JP3405280B2 - AC generator for vehicles - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle AC generator driven by an internal combustion engine of a vehicle, and more particularly to a vehicle AC generator mounted on a passenger car, a truck or the like.

[0002]

2. Description of the Related Art With the need for slant nose to reduce vehicle running resistance and the need to secure a living space inside the vehicle, the engine room has become smaller and smaller in recent years. It's gone. on the other hand,
To improve fuel efficiency, the engine rotation has been reduced and the vehicle AC generator has also reduced rotation. On the other hand, however, an increase in the electric load of safety control devices and the like is demanded, and further improvement in power generation capacity is required. That is, it is required to provide a small-sized and high-output vehicle AC generator at low cost.

In addition, engine noise has been decreasing more and more recently in recent years due to social demands for reducing vehicle exterior noise, and for the purpose of improving the product quality by improving quietness in the vehicle interior. Machine fan noise and magnetic noise are becoming more noticeable.

Japanese Patent Application Laid-Open No. 62-272836 and Japanese Patent Application Laid-Open No. 63-2 have disclosed that a stator winding of an automotive alternator is constructed by using a U-shaped electric conductor called a conductor bar.
74335 and JP-A-64-5340 have been proposed. However, in such a configuration, since the stator cores are laminated along the circumferential direction to form a cylindrical shape, magnetic resistance increases in the magnetic flux passage direction, and desired performance cannot be realized. In addition, there are many problems to be solved such as ensuring practical strength.

WO92 / 06527 also proposes a structure using a conductor bar for a stator of an automotive alternator. According to the configuration shown here, four electric conductors are arranged in a square in one slot.

Further, US Pat. No. 2,928,963 proposes an AC generator using a conductor bar for a stator and having a Landel type field rotor. However, with the configuration disclosed herein, the number of conductors per slot is two, and it is difficult to obtain an output at low rotation.

[0007]

SUMMARY OF THE INVENTION In view of the above problems of the prior art, the present invention is an improved vehicle having a high degree of practicality capable of satisfying the performance required of today's vehicle AC generators. The purpose of the present invention is to provide an AC generator.

Another object of the present invention is to provide a vehicle AC generator having a small size, high output and low noise.

[0009]

According to the present invention, it is possible to obtain the output characteristics required for a vehicle.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Next, a vehicle AC generator to which the present invention is applied will be described based on an embodiment shown in the drawings. (Structure of First Embodiment) FIGS. 1 to 8 show a first embodiment of the present invention. FIG. 1 is a view showing a main part of a vehicle alternator particularly adapted for an automobile. Figure 2
8 to 8 are explanatory views of the stator of this embodiment.

This vehicular AC generator 1 is formed in a stator 2 that functions as an armature, a rotor 3 that functions as a field, a frame 4 that supports the rotor 3 and the stator 2, and a stator 2. It has a rectifier 5 for converting AC power to DC power. The output of this rectifier 5 is connected to a 12V battery. The rotor 3 rotates integrally with the shaft 6, and is composed of a pair of Lundell type pole cores 7, a cooling fan 11, a field coil 8, slip rings 9, 10 and 16 permanent magnets 51. There is.

The permanent magnets 51 are connected by a magnet holder (not shown).

Permanent magnet 51 interposed between pole core claws
Uses a rectangular parallelepiped ferrite magnet. The dimensions are set such that the width between magnetic poles is 8 mm, the axial length is 24 mm, and the radial length is 9 mm. Further, the field coil uses a rectangular conductor, and the resistance value is set to 1.8Ω and the number of turns (T) is set to 330T. A wet anisotropic magnet is used as the permanent magnet 51, and a magnet material that can suppress demagnetization characteristics of 5% or less when fully excited at −30 ° C. is used.

The diameter of the boss portion of the pole core is 50 m
m, and the diameter of the shaft 6 is set to φ17 mm. The magnetic pole cross-sectional areas of the respective parts are set to be substantially the same with reference to a cross-sectional area obtained by subtracting the cross-sectional area of the shaft 6 from the cross-sectional area of the boss portion of the pole core divided by the number of pole pairs.

A pulley is fixed to the end of the shaft 6. The pulley is rotationally driven by a traveling engine (not shown) mounted on the automobile.

The Lundell-type core 7 is composed of a pair of pole cores. The core 7 has a boss portion 71 attached to the shaft 6, two disc portions 72 extending in the radial direction from both ends of the boss portion, and 16 claw-shaped magnetic poles 73 arranged at the tip of the disc portion 72.

The frame 4 is provided with cooling air suction holes 41 and 42 at both axial ends thereof. further,
On the outer periphery of the frame 4, the cooling air discharge holes 4 are provided.
3,44 have been opened. The discharge holes 43 and 44 are arranged in two rows of annular shapes facing the coil end 31.
The outer diameter of the pulley is set larger than the outer diameter of the suction hole 41 on the axial end surface of the frame 4.

The stator 2 is composed of a stator core 32, a plurality of conductor segments 33 that form a stator winding, and an insulator 34 that electrically insulates the stator core 32 and the conductor segments 33 from each other. It is supported by M4. The stator core 32 is a laminated type in which thin steel plates are laminated, and a plurality of slots 35 are formed on the inner peripheral surface thereof.

In one slot 35, two rectangular electric conductors are inserted as an inner layer conductor and an outer layer conductor. These electrical conductors are provided by conductor segments 33. The conductor segment 33 has a shape that can be called a U-shape or a V-shape.

The stator winding is composed of a large number of electrically connected conductor segments 33. The turn portion 33 of the conductor segment 33 is provided on one of the axial end faces of the stator core 32.
c is arranged, and the joint portion 33d is arranged on the other side. The joint portion 33d is formed by connecting the ends of different conductor segments 33. The conductor segments 33 project at both ends of the stator core 32 and form coil ends 31 respectively. And a plurality of conductor segments 3
As a result of the 3's being annularly arranged on the stator core 32, an annular coil end group is formed.

Of the conductor segments 33, the stator core 3
The ridge line portion 33e extending from 2 is inclined in the opposite direction in the outer layer and the inner layer. A predetermined gap is provided between adjacent conductor segments 33 in the coil end group so as to ensure electrical insulation.

The disk end 72 of the pole core 7 of the rotor 3 faces the coil end 31.

The conductor segment 33 may or may not have an insulating film.

The insulator 34 is provided between the stator core 32 and the conductor segment 33, as shown in FIG.
It is arranged in an S shape so as to insulate between the electric conductors in the slots.

The tip teeth of the stator core 32 are work-hardened when the stator core 32 is manufactured or by pushing and bending after inserting the conductor segment 33.

The stator winding has three phase windings of X, Y and Z. One winding end 33f of each phase extends in the axial direction and is electrically connected directly to the electrode portion 53 of the rectifying element 52 provided in the rectifier 5 by fusing welding or the like. A portion 33g having a narrowed cross-sectional area is formed at the winding end 33f in order to absorb vibration and relieve transmission of stress.

The other winding end of each phase is electrically connected as a neutral point 33k as shown in FIG. 22, either directly or through a conductor.

The manufacturing process of the stator winding will be described.

As shown in FIG. 3, the U-shaped conductor segment 33 is composed of an inner layer side conductor portion 33a, an outer layer side conductor portion 33b and a turn portion 33c. This segment 3
3 is manufactured by bending a copper plate and pressing.

The plurality of conductor segments 33 are stacked so that the plurality of turn portions 33c are aligned on the same side of the axial end surface of the stator core 32. Then, as shown in FIG. 4, the outer-layer-side conductor portion 33b is inserted so that the inner-layer-side conductor portion 33a is located on the inner side in the depth direction of the slot 35 and the inner-layer-side conductor portion 33a is located on the front side in the depth direction of the slot 35. As a result, the side walls of the slots 35 that are substantially parallel to each other are provided on both sides of the electrical conductor.
It is press-fitted so as to face each other.

On the other hand, on the other end side of the stator core 32, the end portions of the plurality of conductor segments 33 are arranged so as to project as an inner layer and an outer layer. Then, as shown in FIG. 5, the inner layer and the outer layer are bent in opposite directions in the circumferential direction. The inner layer and the outer layer are bent by a predetermined number of slots. After that, the ends of the different conductor segments 33 in different layers are joined together to form a joint 33d. As the joint portion 33d,
Ultrasonic welding, arc welding, brazing, etc. can be adopted so as to conduct electricity.

In this embodiment, the number of magnetic poles of the rotor 3 is set to 16, the number of slots of the stator core 32 is set to 96, and the stator winding constitutes a three-phase winding. The outer diameter of the stator is 130 mm and the inner diameter is 102 mm. The laminated thickness of this stator core 23 is 34 mm,
SPCC materials having a plate thickness of 0.5 mm are laminated and fixed by laser welding or the like. The slots are set at equal intervals at a 3.75 ° pitch corresponding to an electrical angle of 30 °. The shape is a substantially rectangular shape whose side surfaces are parallel to each other, and the side surface width is 1.8 mm, the depth is 10 mm, the back thickness is 3.5 mm, and the opening width is 0.8 mm. Further, the radial thickness of the tip tooth tip portion is set to 0.5 mm.

The electric conductor inserted in this slot is
The thickness is 1.6 mm, the width is 4.5 mm, and the corners are 0.6 mm.
R of mm or less is taken. An insulator 34 having a thickness of about 100 μm is interposed between the slot and the electric conductor.

A concrete connection example will be described with reference to FIGS. 6, 7 and 8. The lower crossover portion of FIGS. 6 and 7 is the turn portion 33c of the segment, and the upper portion thereof is the joining portion 33d.
In the figure, the solid line shows the electric conductor of the inner layer, and the alternate long and short dash line shows the electric conductor of the outer layer.

First, the X phase of the three-phase winding will be described. The slot numbers from 4 to 94 (4th, 10th, 16th ... 94th) at every 6th slot form the first slot group. Adjacent to these, from No. 5 to No. 95 every 6 slots (No. 5, No. 11, No. 17 ... 95
No.) forms the second slot group.

The first winding formed by the plurality of conductor segments 33 housed in the first slot group includes two wave windings. The second winding formed by the plurality of conductor segments 33 housed in the second slot group includes two wave windings.

The first winding and the second winding are connected in series via two connecting portions 102 and one connecting portion 103. The two wave windings of the second winding are the connection parts 1
It is inverted by 03 and connected in series. The wave winding of the first winding is connected in series to each of both ends thereof by the connecting portion 102. Then, the two ends of the first winding are drawn out as a winding end X and a winding end X ′.

The connecting portion 102 connects the inner layer electric conductor and the outer layer electric conductor which are accommodated in the slots separated by 5 slots. The connection portion 103 connects the electric conductors of the same layer housed in the slots separated by 6 slots.

As a result, the X phase is constructed by serially connecting the first winding and the second winding that are out of phase by 30 ° in electrical angle. Since the first winding is 2T and the second winding is 2T, a 4T stator winding is formed. Similarly,
Y phases and Z phases are formed at an electrical angle of 120 °, and these three phases are star-connected as shown in FIG.

In the above embodiment, the X-phase first slot group, the Y-phase first slot group, and the Z-phase first slot group belong to the first slot set, and the X-phase second slot group. When,
The Y-phase second slot group and the Z-phase second slot group belong to the second slot set. All of the windings installed in these slot sets are evenly exposed to the outside at the coil ends, and are evenly exposed to the cooling air. Two electrically adjacent windings are connected in series and combined as an alternating current, and six windings provided by two slot sets are connected in three phases. Further, since these windings have a gap between the coil ends, even the coil end arranged on the leeward side is sufficiently exposed to the wind. For this reason, there is almost no difference in surface area that contributes to heat dissipation between the windings. In other words, as a three-phase polyphase AC generator,
All windings are placed in equal cooling conditions, despite including windings corresponding to 6 phases, which is twice the number of phases.

In the stator windings shown in FIGS. 5, 6 and 7, the turn portion 33c of the conductor segment 33 is arranged on one end surface side of the stator core 32 and connected to the rectifier 5. The wire end 33f is drawn out from the other end surface side of the stator core 32. (Effects of Embodiment) With the above-described structure, the ridge line portions 33e of the conductor segments 33 located in the inner layer can be inclined in the same direction, and the conductor segments 33 located in the outer layer can be inclined. The ridges 33e can be inclined in the same direction.

Therefore, the multi-phase stator windings can be arranged at the coil ends without interference. Therefore, the space factor of the electric conductor in the slot can be improved and the output can be increased. Moreover,
Since a gap that ensures electrical insulation is provided between the adjacent electric conductors at the coil end, the temperature rise is significantly suppressed. Particularly, in this embodiment, the cooling fan 11 as an inner fan fan is provided at the axial end of the Lundell type rotor, and the discharge holes 43, 44 as ventilation holes are provided in the frame 4 corresponding to the outer peripheral side of the coil end 31. Since it is provided, the ventilation resistance of the cooling air passing through the coil end group toward the outer peripheral portion of the frame can be extremely reduced, and the cooling performance can be greatly improved.

By connecting the windings of adjacent slot groups in series to form a stator winding, the number of electric conductors per slot is reduced to secure a gap between the conductors at the coil end, and It is possible to obtain the T number required for the power generator.

In the case of the conventional method of designing the stator with the number of slots which is three times the number of magnetic poles of the rotor, it is not possible to obtain a T number that is greater than the number of electric conductors in the slots. Generally, a vehicle AC generator having a rating of 0.5 to 2.5 kw is used. Such output, the limitation of a predetermined physique that can be mounted on the vehicle,
When attempting to realize it under the limitation of the engine speed, at least the stator winding needs to have 3T or more. When a T number smaller than this is set, output is not output at low speed rotation as shown by the broken line in FIG. 9, and output is high only at high speed, which is an unsuitable characteristic for a vehicle AC generator.

For example, the number of slots is 3 times the number of magnetic poles of the rotor.
The output characteristics of the comparative example and the comparative example in which the number of electric conductors per slot is two, the T number of the stator winding is 2T, and the output characteristics of the present example are shown by the broken line and the solid line in FIG. In the conventional method, a significant decrease occurs in the vicinity of the vehicle idle speed, which has a high rotation frequency, and cannot be realized as a vehicle generator. Inevitably, the number of electrical conductors per slot must be increased. However, as long as the cross-sectional area of one electric conductor is the same, there arises a problem that the ventilation property is deteriorated and the cooling property is deteriorated due to the reduction of the gap between the coil ends. Further, there is a problem that the manufacturing cost increases with the increase in the number of assembling steps of the electric conductor. On the contrary, if the cross-sectional area of one electric conductor is reduced and the number of T's is increased, the impedance of the winding becomes high, and it becomes impossible to increase the output.

On the other hand, in the present embodiment, the number of slots is three times or more the number of poles and the portion for connecting the conductors of the adjacent slots in series is provided. Therefore, the number of conductors per slot is the minimum 2. It can be a book. In particular,
The number of slots is 96, which is twice as many as the number of slots, which is three times the number of slots required for a three-phase generator with respect to the number of magnetic poles of 16 poles. For example, 3 for 12 poles
72 slots may be employed in a phase. As a result, a gap can be formed at the coil end to ensure the cooling performance by ventilation, the space factor in the slot can be improved without increasing the manufacturing cost, and the output characteristics required for the vehicle can be obtained from low rotation. .

Further, the first winding and the second winding whose electrical angles are deviated by 30 °
Since the windings are connected in series, the magnetomotive pulsation power can be reduced, so that magnetic noise can be significantly reduced.

Moreover, the first winding and the second winding are evenly exposed to the outside at the coil end and are evenly exposed to the cooling air. Moreover, between the coil ends,
Since a gap is provided to allow ventilation to pass therethrough, high cooling performance can be obtained. This relationship is realized for all six windings housed in the six slot groups, and all windings are cooled evenly.

Further, in the wire connection method of FIGS. 6 and 7, since the two-layered inner layer side electric conductors and the outer layer side electric conductors are alternately connected, the lengths of the crossover portions of each phase are eventually the same. Therefore, the electric resistance value of the winding of each phase becomes uniform.
In addition, the inductance of the stator winding differs depending on the position in the slot, but in this embodiment, the number of inner layer side electrical conductors and the number of outer layer side electrical conductors are the same for each phase, so the inductances are substantially the same. be able to. That is, since the impedance can be made uniform, local heat generation can be prevented.

Further, the axial height of the coil end can be remarkably reduced, and as a result, the resistance value can be reduced to about half that of the conventional stator winding. As a result, it is possible to achieve small size and high output by reducing the impedance, and also achieve temperature reduction and high efficiency by reducing the amount of heat generation.

Further, as the coil end height is reduced,
The axial length of the stator 2 can be suppressed. As a result, the roundness of the corners of the frame 4 can be increased. As a result, a vehicle AC generator having a round body can be configured, and mechanical rigidity can be improved. Further, there is an effect that it is possible to avoid interference with other components when mounted on a vehicle.

Further, since the cooling performance of the coil end is greatly improved, the fan can be downsized. further,
As for the coil end group, the surface unevenness is smoothed, uniform repeating patterns are formed, and the cooling air traverses the inside of the coil end, which significantly reduces fan noise generated between the coil end and the cooling air. Can be reduced to

The turn portion 33 of the conductor segment 33
Since the winding end 33f is taken out from the side opposite to c, the turn portion 33c can have the same shape. Therefore, the length of the linear portion other than the turn portion 33c can be changed to accommodate the formation of the winding end 33f and the connection portions 102 and 103. Therefore, since it suffices to manufacture the conductor segments 33 that differ only in the length of the straight line portion, the number of production steps can be greatly reduced,
Can be handled with inexpensive equipment.

By making the cross section of the electric conductor rectangular,
The space factor can be increased, and the conductor segment can be formed by pressing or the like, so that the material and the processing cost can be reduced.

Further, since the facing area between the electric conductor and the stator core becomes large, the heat transfer becomes good and the temperature of the electric conductor can be further reduced. In addition, since the rigidity of the entire stator is increased, it also has the effect of suppressing magnetic noise. Also,
Since the rigidity of the electric conductor itself is increased, it is easy to manage the gap between the coils. As a result, it is possible to eliminate the insulating film of the electric conductor and the fixing material of the electric conductor, and it is possible to provide a generator with high reliability and low cost. Further, since the rigidity of the winding end portion is increased, the terminal block of the rectifier 5 which has been conventionally required can be eliminated, and it is possible to directly connect to the rectifying element 52, so that the cost can be further reduced.

In the slot, a single wire electric conductor is
As it is housed in two layers inside and outside, assembly becomes easy. Moreover, since there is only one joining portion in the radial direction, there is no overlap with other joining portions, the steps such as welding are facilitated, and productivity is improved. Therefore, a low cost generator can be provided. Furthermore, since it can be configured with one set of rectifiers, electrical parts can be simplified and the cost can be reduced.

Since it is a Lundell type rotor,
Since iron material can be used for the cooling fan, the durability against high speed rotation is superior to that of the Celent type rotor. This is because the magnetic poles are lined up on the axial end face in the Celent type rotor, so that a member provided on the axial end face must use a non-magnetic material such as aluminum or resin to prevent a magnetic flux short circuit. Due to such high speed durability, the pull ratio can be set high, so that the rotational speed of the rotor during idling rotation of the engine can be increased to improve the output.
Further, since the material cost of the fan and the processing cost are low, and the cheap fusing welding or the like can be adopted as the joining means with the pole core, the manufacturing cost can be reduced. (Second Embodiment) FIGS. 10 to 12 show a second embodiment.
In the first embodiment, the turn portion 33c of the conductor segment 33 is provided on one side of the end surface of the stator core 32, but in the second embodiment, the conductor segment separated by the turn portion 33c is used. The difference is that the joint portions are arranged on both sides of the stator core 32.

As shown in FIG. 11, the conductor segment 33 includes an inner conductor 33h, which is a substantially linear portion inserted into the slot 35, and both sides of this inner conductor in the axial direction of the stator core 32. It has an outer conductor 33i which is a substantially linear portion extending to the.

The outer conductor 33i has an angle and a length that go around a distance of about half the magnetic pole pitch. Outer conductor 3
3i forms a ridge portion as the coil end 31 as shown in FIG. Then, the ridge line portion 33 of the inner layer and the outer layer
A plurality of conductor segments 33 are inserted in the slots so that the inclination of i is reversed. In addition, the stator core 32
Is manufactured from a semi-finished product in which the tip 32a of the tooth tip is U-shaped or J-shaped as shown in FIG. After inserting the plurality of conductor segments 33 into the slots, the stator core 32 applies plastic working to the tooth tip 32a by pressing a machining jig against the tooth tip 32a from the radial direction,
It is manufactured by narrowing the opening on the inner peripheral side of the slot. By doing so, the conductor segment 33 can be inserted from the inner side in the radial direction, the conductor segment can be processed into the final shape in advance, and the assembling becomes easy.

Further, after inserting the conductor segment, the conductor segment is compressed from the inner side in the radial direction to be deformed according to the slot shape, so that a higher space factor can be obtained. Further, since the tip of the tooth tip is work hardened by the plastic working, there is an effect that the tooth tip deformation due to the spring back of the conductor segment 33 can be prevented.

Although the conductor segment 33 is preliminarily processed, it may be bent after it is housed in the slot. (Third Embodiment) In the first and second embodiments, only one pair of electric conductors in the inner and outer layers, that is, the number of electric conductors per slot is 2T, but the electric conductors may be formed by repeating the conductor segment insertion step. May be two or more pairs. Also in this case, as shown in FIG. 13, interference between coil ends of different phases can be avoided as in the first embodiment. Therefore, similar to the above-described embodiment, effects such as a high space factor, high cooling efficiency, and low noise can be obtained. Furthermore, since the number of electric conductors per slot increases, power generation can be started from a low engine speed, and the amount of power generation at low speed rotation can be increased.

FIG. 14 shows the arrangement of the insulators when two pairs of electric conductors for the inner and outer layers, that is, the number of conductors per slot is 4T.

Furthermore, by providing two or more pairs of electric conductors for the inner and outer layers, it is possible to configure an arbitrary T number by changing the setting of the number of slots, the connecting point, and the like. (Fourth Embodiment) In the first to third embodiments, the electrical angle is 30.
By connecting the windings housed in two slot groups having a phase difference of ° in series, the number of Ts per slot is increased and the 6th order component of the number of pole pairs, which is the main component of magnetic sound, is canceled. We are trying to reduce noise. That is, the outputs of the two windings are combined in the AC state.

On the other hand, as shown in the stator winding development views of FIGS. 15 and 16 and the circuit diagram of FIG.
The difference is that two sets of three-phase windings having a phase difference of 0 ° are rectified by respective rectifiers, and then combined and output. That is,
The outputs of the two windings are combined in the DC state.

A concrete connection example will be described with reference to FIGS. 15, 16 and 17. The crossover portion on the lower side of FIGS. 15 and 16 becomes the segment turn portion 33c, and the upper portion on the connecting portion 33d.
Becomes In the figure, the solid line indicates the inner layer electric conductor, and the alternate long and short dash line indicates the outer layer electric conductor.

First, the X-phase first winding and the second winding will be described. Slot number 4 to 9 every 6th slot
Up to the 4th (4th, 10th, 16th ... 94th) form the first slot group. 5 to 6 adjacent to these
Up to 95 every other slot (5th, 11th, 17th ...
No. 95) forms the second slot group.

The first winding formed in the first slot group is
It has a winding end X1 and X1 ′ shown in FIG. The first winding includes two wave windings that are connected in series by an inverting connection portion that is laid between the winding end X1 and X1 ′.

The second winding formed in the second slot group is
It has winding ends X2 and X2 ′ shown in FIG. 16, and is formed in the same manner as the first winding.

Further, in the same manner, Y-phase and Z-phase are formed at an electrical angle of 120 ° apart. The first winding and the second winding are also formed for each of these phases.

Then, these six windings are connected as shown in FIG. Three X-, Y-, and Z-phase first windings are star-connected and connected to the first rectifier. Three X-, Y-, and Z-phase second windings are star-connected and connected to the second rectifier. The DC output of the first rectifier and the DC output of the second rectifier are connected in parallel, and the DC outputs are combined.

Thus, the DC outputs of the 2T three-phase windings are summed and taken out, so that the output shortage in the low rotation range can be improved. Furthermore, by combining with the third embodiment in which two or more pairs of inner and outer layer electric conductors are arranged, 4T or more can be realized and the problem of insufficient power generation in the low rotation range can be solved. Further, since it is not necessary to connect two windings having different electric angles in series, the conductor segments can have the same shape, and the production efficiency of the conductor segments can be further improved.
The effect of canceling the sixth-order component of the number of pole pairs, which is the main component of magnetic sound, to achieve noise reduction is also obtained.

In the above embodiment, the X-phase first slot group, the Y-phase first slot group, and the Z-phase first slot group belong to the first slot set, and the X-phase second slot group. When,
The Y-phase second slot group and the Z-phase second slot group belong to the second slot set. The windings provided in these slot sets are multi-phase connected as different multi-phase stator windings, respectively rectified separately, and then connected in parallel as direct current to be combined. (Other Embodiments) In the first embodiment, the conductor segments are joined only on one side of the end surface of the stator 2, but they may be joined on both sides. For example, the turn portions of the plurality of conductor segments may be dispersedly arranged on both sides of the stator core 32. In this case, the distance between the joints can be widened, and the joining process such as welding is facilitated.

The stator core 32 shown in FIG. 12 used in the second embodiment and the conductor segment 33 shown in FIG. 3 used in the first embodiment can be combined.

When the stator core 32 of FIG. 12 is adopted, the conductor segments can be inserted into the slots, and plastic working can be performed in order from the slots where the insertion is completed. This can dramatically improve the production efficiency.

As the electric conductor, an electric conductor having a rectangular cross section composed of a plurality of strands can be adopted.

In the above example, the electrical conductor is made of copper. Instead of this, aluminum, iron or the like can be used. By selecting such a material, the material cost can be reduced, and the conductor segment can be manufactured by casting or die casting, and the production process can be facilitated.

Although the cross section of the electric conductor is rectangular,
It may have a round cross section. Alternatively, a combination of a rectangle and a circle may be used. For example, the inside of the slot can be rectangular and the outside of the slot can be circular. In this case, the effects of high space factor and high cooling performance can be obtained. On the contrary, if the inside of the slot is round and the outside of the slot is rectangular, a sufficient gap can be secured between the electric conductors at the coil ends, the ventilation resistance of the cooling air can be reduced, and the cooling performance can be greatly improved. The electric conductor having a rectangular cross section has a shape that can be called a flat shape.

An insulating film may be provided on the conductor segment 33, and the insulator may be arranged in a U shape along the inner wall of the slot. In this case, there is an effect that the shape of the insulator can be simplified. Further, the stator core 32 may be insulated to eliminate the insulator. In this case, when inserting the conductor segment 33 into the slot, it is possible to prevent the insulator from shifting and causing insulation failure.

The stator winding may be a multi-phase winding having three or more phases. Even with a multi-phase winding, windings can be regularly formed on the stator core 32 and the winding shape is not complicated. By using three or more phases, it is possible to further reduce the noise and ripple of the output voltage.

The stator windings may be triangularly connected. This can be appropriately selected according to the characteristics of the power generation amount required by the vehicle.

A rotor having no permanent magnet may be adopted as the rotor. Further, it may be a rotor only by exciting a permanent magnet.

Cooling fans may be provided on both end faces of the rotor. For example, the configuration shown in FIG. 18 can be adopted. In this embodiment, the cooling fan 12 is also mounted on the front end surface of the rotor. With this configuration, good cooling characteristics can be obtained. In the Lundell type rotor, since the wind is generated at the disk portion of the pole core, the required cooling performance can be obtained by using only one cooling fan 11 shown in FIG. 1. There is an effect that the physique as an AC generator for automobiles can be downsized.

Further, the structure shown in FIG. 19 may be adopted. On the end face where the cooling fan of the rotor 3 is not installed,
Inner wall surfaces 45 of the outer peripheral portion of the suction hole 41 of the frame 4 are closely arranged and opposed. As a result, the inner wall surface 45 plays the role of a shroud by using the disk portion 72 of the pole core 7 as a fan. Therefore, the air blowing capacity of the disc portion 72 is increased. Therefore, as compared with the case where cooling fans are provided on both sides, the same cooling performance can be achieved without increasing the number of parts and the number of processing steps, and the size can be further reduced.

As shown in FIG. 23, the winding end 33f may be provided on the same side as the turn portion 33c. Accordingly, in the joining process such as welding at the joining portion, the winding end 33
Since f does not get in the way and the repeated bonding of the same pattern is performed, the production process becomes easy.

In the embodiments described above, the number of slots is six times the number of magnetic poles of the rotor. The number of turns of a series of windings was set to 4T by providing a place where the electric conductors housed in two adjacent slots are connected in series. This can be referred to as a three-phase double slot series winding. Instead of this, for example, the number of slots is 9
It may be doubled. Then, by providing a location where the electric conductors housed in the three adjacent slots are connected in series,
It can be 6T. This can be referred to as a three phase triple slot series winding. It is also possible to set the number of turns to an odd number, such as 5T, by providing a place for parallel connection without connecting the conductors in the same slot in series. A larger number of turns may be set by increasing the number of slots.

The number of slots provided in the stator core 32 may be increased by one slot as compared with the double slot configuration. For example, 97 slots are used for the stator core 3
2 may be formed. 20 and 21 are developed views for explaining the connection in this case. In the figure, the solid line is the inner layer electric conductor,
The alternate long and short dash line indicates the outer layer electric conductor. According to this configuration, the shape, particularly the height, of the wire connection portions 104 and 105 can be made the same for the other coil ends. In the wire connections shown in FIGS. 6 and 7, the wire connection portions 102 and 103 have different heights from the other coil ends, require electric conductors of different shapes, and complicate the joining process. Invite.

The connecting portion 104 connecting the electric conductors forming the different layers of the adjacent slots has the same inclination and height as the other coil ends. Therefore, when manufacturing the U-shaped conductor segment, the length of the straight line portion can be unified, and the production process of the conductor segment can be facilitated. Further, since the wire connection portion 105 for connecting the electric conductors of the same layer can have the same shape as that of the normal repetition, the wire connection process is facilitated.

With this configuration, the winding end X shown in FIGS.
The turn portion of the U-shaped conductor segment may be arranged on the pull-out side such as. Since the spread of the turn portion is unified to all six slots, there is also an effect that the production process of the segment is facilitated.

Further, the stator may be coated with an insulating resin for ensuring electric insulation. Such resins are also called impregnating resins. Such a resin is effective for improving the electric insulation of the winding or for fixing and fixing the stator-like segments to each other. In addition,
When coating the resin, it is desirable to apply it so as not to impair the ventilation of the coil end group.
However, the resin may close the gap between the coil ends to some extent. Even with this configuration,
By maintaining a gap between each segment in the coil end group, it is possible to secure a large surface area that contributes to heat dissipation and obtain high cooling performance.

According to the above-described embodiment, the coil end interference can be suppressed, the space factor of the stator winding can be increased, and the output can be improved. Furthermore, since the conductors located in the inner and outer layers of different slots are connected in series, the conductor length of each phase winding and the leakage inductance due to the position in the slot are made uniform in each phase. Therefore, the current flowing through the coil is made uniform, and the amount of heat generated in each phase is also the same.
It is possible to prevent local heat generation of the stator winding and imbalance of magnetomotive force, thereby reducing temperature and noise. In addition, by using a stator winding that connects adjacent slots in series, the number of conductors per slot is reduced to secure a gap between the conductors at the coil end, and at the time of low rotation required for a vehicle generator. You can get the number of turns to get the output. In particular, in the above-described embodiment, since two sets of three-phase stator windings having different electrical angles of 30 degrees are configured, it has an effect of suppressing electromagnetic noise, and is substantially electric. Since the outputs of the six windings with different phases are combined, the ripple component contained in the rectified DC power is small, and high-quality power can be supplied. Moreover, the stator winding is formed by using the segments, and the electric conductors are stacked and accommodated only in the depth direction in the slots. For this reason, a plurality of coil ends having a uniform shape can be uniformly arranged, and a plurality of windings having electrically different phases are evenly exposed to the outside at the coil ends, respectively. Can be evenly exposed to. Moreover, since the plurality of conductor segments are separated from each other at the coil end,
A sufficient surface area for heat dissipation is ensured. Furthermore, excellent heat dissipation is realized by the cooling air flowing across.
Due to these effects, it is possible to achieve high heat dissipation and cooling while eliminating the variation in cooling for each of the plurality of windings, and in combination with the reduction in electrical resistance due to the improvement in the cross-sectional area of the electrical conductor, downsizing, Provided is a vehicle AC generator that can be adapted to high output.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a first embodiment of the present invention.

FIG. 2 is an external view of a stator according to the first embodiment.

FIG. 3 is a perspective view of a conductor segment 33 of the first embodiment.

FIG. 4 is a partial cross-sectional view of the stator of the first embodiment.

FIG. 5 is a perspective view showing coil ends on both end faces of the stator of the first embodiment.

FIG. 6 is a development view showing a connection state of stator windings, showing first to 48th slots.

FIG. 7 is a development view showing a connection state of stator windings, showing slots 49 to 96;
FIGS. 6 and 7 show a series of stator windings connected in a ring by VV and VI-VI lines.

FIG. 8 is a circuit diagram of a vehicle AC generator.

FIG. 9 is a graph showing the output characteristics of the vehicle alternator.

FIG. 10 is a partial external view of the stator of the second embodiment.

FIG. 11 is a perspective view of a conductor segment 33 of the second embodiment.

FIG. 12 is a partial cross-sectional view of the stator of the second embodiment.

FIG. 13 is a perspective view showing a coil end of a stator of a third embodiment.

FIG. 14 is a partial cross-sectional view of the stator of the third embodiment.

FIG. 15 is a development view showing a connection state of a stator winding of the fourth embodiment.

FIG. 16 is a development view showing a connection state of a stator winding of the fourth embodiment. 15 and 16 show VII-V.
A line II and a line VIII-VIII are connected in a ring to show a series of stator windings.

FIG. 17 is a circuit diagram of a vehicle AC generator according to a fourth embodiment.

FIG. 18 is a vertical cross-sectional view of another embodiment.

FIG. 19 is a vertical cross-sectional view of another embodiment.

FIG. 20 is a development view showing a connection state of a stator winding of another embodiment.

FIG. 21 is a development view showing a connection state of a stator winding of another embodiment. 20 and 21 are IX-IX.
A line, XX line, is connected in a ring to show a series of stator windings.

FIG. 22 is a perspective view showing a stator winding end of the first embodiment.

FIG. 23 is a perspective view showing a stator winding end of another embodiment.

[Explanation of symbols] 1 Vehicle AC generator 2 stator 3 rotor 31 coil end 32 Stator core 33 conductor segment 34 insulator 35 slots 4 frames 5 rectifier 6 shafts 7 pole core 8 field coil

─────────────────────────────────────────────────── --Continued front page (56) References JP-A-8-205441 (JP, A) JP-A-9-182337 (JP, A) International Publication 92/006527 (WO, A1) US Patent 1826295 (US, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) H02K 19/22 H02K 3/04

Claims (8)

(57) [Claims] 1. A field rotor that forms NS poles alternately along the circumferential direction of rotation, a stator core arranged to face the rotor, and a multi-phase stator winding mounted on the stator core. A stator having a wire and a frame supporting the rotor and the stator.
In the vehicular alternator, the field rotor includes a Landel-type iron core having a plurality of claw-shaped magnetic poles that provide the N pole and the S pole, and the stator iron core is a laminated plate. Comprising a laminated iron core having a plurality of slots extending therethrough, the multi-phase stator winding comprising a plurality of conductor segments,
The plurality of conductor segments are arranged in the slot in the depth direction of the slot.
For the inner and outer layers, one or more pairs are arranged.
And are housed in the slots insulated from each other.
Ri, in the outside of the slot, on the end face side of the stator core
It is extended and arranged, and the NS magnetic pole pick of the rotor is arranged.
Series connection of different layers in spaced slots
The coil end is formed by the connection pattern
As a result, the connecting pattern is formed on the end face side of the stator core.
The coil end group that mainly repeats
In addition, the plurality of conductor segments at the coil end are
And the ventilation direction of the cooling air in the frame.
They are arranged so that they extend in a crossed manner, and are also spaced apart from each other.
Are arranged in rows to form a plurality of conductor cells at the coil end.
A configuration is provided in which cooling air flows across the magnets and the plurality of slots are aligned with the magnetic pole pitch of the field rotor.
Correspondingly spaced multiple slots for one phase slot group
As a first slot set consisting of slots for multiple phases
And further, a predetermined electrical angle deviation from the first slot set
And a second slot set, the multi-phase stator winding
Are stored in the slot group included in the first slot set.
The plurality of conductor segments contained in the first winding
The slot formed and included in the second slot set
The a plurality of the conductor segments accommodated in the group 2
A winding is formed, and the first winding and the second winding are connected in series.
A plurality of the slots included in the first slot set.
The outputs of the polyphase first windings housed in the slot group,
The plurality of slot groups included in the second slot set
The output of the accommodated polyphase second winding is combined and output
In addition, the number of slots of the stator core is set to 96, and the alternator for vehicles is characterized. 2. A field rotor that forms NS poles alternately along the circumferential direction of rotation, a stator core arranged to face the rotor, and a multi-phase stator winding mounted on the stator core. A stator having a wire and a frame supporting the rotor and the stator.
In the vehicular alternator, the field rotor includes a Landel-type iron core having a plurality of claw-shaped magnetic poles that provide the N pole and the S pole, and the stator core is a laminated plate. Comprising a laminated iron core having a plurality of slots extending therethrough, the multi-phase stator winding comprising a plurality of conductor segments,
The plurality of conductor segments are arranged in the slot in the depth direction of the slot.
For the inner and outer layers, one or more pairs are arranged.
And are housed in the slots insulated from each other.
Ri, in the outside of the slot, on the end face side of the stator core
It is extended and arranged, and the NS magnetic pole pick of the rotor is arranged.
Series connection of different layers in spaced slots
The coil end is formed by the connection pattern
As a result, the connecting pattern is formed on the end face side of the stator core.
The coil end group that mainly repeats
In addition, the plurality of conductor segments at the coil end are
And the ventilation direction of the cooling air in the frame.
They are arranged so that they extend in a crossed manner, and are also spaced apart from each other.
Are arranged in rows to form a plurality of conductor cells at the coil end.
A configuration is provided in which cooling air flows across the magnets and the plurality of slots are aligned with the magnetic pole pitch of the field rotor.
Correspondingly spaced multiple slots for one phase slot group
As a first slot set consisting of slots for multiple phases
And further, a predetermined electrical angle deviation from the first slot set
And a second slot set, the multi-phase stator winding
Are stored in the slot group included in the first slot set.
The plurality of conductor segments contained in the first winding
The slot formed and included in the second slot set
Second by a plurality of said conductor segments housed in a group
A winding is formed, and the first winding and the second winding are connected in series.
A plurality of the slots included in the first slot set.
The outputs of the polyphase first windings housed in the slot group,
The plurality of slot groups included in the second slot set
The output of the accommodated polyphase second winding is combined and output
At the same time, the number of slots of the stator core is set to 97, and an alternator for a vehicle is provided. 3. NS poles are formed alternately along the circumferential direction of rotation.
Field rotor and stator iron arranged to face the rotor
The core and the multi-phase stator windings equipped on this stator core
The stator provided and the frame supporting the rotor and the stator.
In a vehicular alternator, the field rotor provides the north pole and the south pole.
A field-type rotor having a plurality of claw-shaped magnetic poles is provided.
The air is blown toward the outer side in the centrifugal direction by the rotation, and
Flow across multiple conductor segments in the
The stator core is provided with a plurality of slots extending through the laminated plate.
A multi-layer stator winding , wherein the multi-phase stator winding includes a plurality of conductor segments,
The plurality of conductor segments are separated from each other in correspondence with the NS magnetic pole pitch of the rotor.
Substantially U having two straight portions accommodated in the slot
A V-shaped segment, in the slot, in the depth direction of the slot
Arrayed only in the inner layer and the depth direction of the slot.
And arranged as two or more pairs as an outer layer,
They are housed in a lot insulated from each other. Outside the slot, a plurality of U-shaped segment
The turn part of the rotor is the coil end of the stator core.
It is arranged so as to project in the axial direction from one end face side, and
Are spaced apart from each other to form a first coil end group.
In addition, the ends of the plurality of U-shaped segments are
Is arranged so as to extend to the other end face side of the
Different layers in slots spaced corresponding to S pole pitch
The coil end is shaped by a connection pattern that connects in series.
As a result, on the other end face side of the stator core
Is a second coil end that mainly repeats the connection pattern
A plurality of U-shaped segments are formed at the ends of the second coil.
The ends of the U-shaped segment that are different from each other in the end group
Are joined to form a plurality of joints,
The joint portions are arranged in a multiple ring shape, and the second joint
Within the il-end group, they are
Are spaced apart from each other, and further, the plurality of conductor segments at the coil end are arranged.
And the ventilation direction of the cooling air in the frame.
They are arranged so that they extend in a crossed manner, and are also spaced apart from each other.
Are arranged in rows to form a plurality of conductor cells at the coil end.
A configuration is provided in which cooling air flows across the magnets and the plurality of slots are aligned with the magnetic pole pitch of the field rotor.
Correspondingly spaced multiple slots for one phase slot group
As a first slot set consisting of slots for multiple phases
And further, a predetermined electrical angle deviation from the first slot set
A second slot set and the multi-phase stator winding is included in the first slot set.
The plurality of conductor segments housed in the slot group
Form a first winding and include a second winding in the second slot set.
A plurality of conductor segments housed in the slot group
The second winding is formed by the ment and the plurality of slot groups included in the first slot set are
Rectify and output the ac output of the stored multiphase first winding
The first rectifier that operates, and the second rectifier included in the second slot set.
Number of the multi-phase second windings housed in the slot group
A second rectifier that rectifies and outputs an AC output,
The rectified output of the first rectifier and the rectified output of the second rectifier
It is synthesized and output, and the number of slots of the stator core is set to 96.
AC generator for vehicles to collect. 4. NS poles are alternately formed along the circumferential direction of rotation.
Field rotor and stator iron arranged to face the rotor
The core and the multi-phase stator windings equipped on this stator core
The stator provided and the frame supporting the rotor and the stator.
In a vehicular alternator, the field rotor provides the north pole and the south pole.
A field-type rotor having a plurality of claw-shaped magnetic poles is provided.
The air is blown toward the outer side in the centrifugal direction by the rotation, and
Flow across multiple conductor segments in the
The stator core is provided with a plurality of slots extending through the laminated plate.
A multi-layer stator winding , wherein the multi-phase stator winding includes a plurality of conductor segments,
The plurality of conductor segments are separated from each other in correspondence with the NS magnetic pole pitch of the rotor.
Substantially U having two straight portions accommodated in the slot
A V-shaped segment, in the slot, in the depth direction of the slot
Arrayed only in the inner layer and the depth direction of the slot.
And arranged as two or more pairs as an outer layer,
They are housed in a lot insulated from each other. Outside the slot, a plurality of U-shaped segment
The turn part of the rotor is the coil end of the stator core.
It is arranged so as to project in the axial direction from one end face side, and
Are spaced apart from each other to form a first coil end group.
In addition, the ends of the plurality of U-shaped segments are
Is arranged so as to extend to the other end face side of the
Different layers in slots spaced corresponding to S pole pitch
The coil end is shaped by a connection pattern that connects in series.
As a result, on the other end face side of the stator core
Is a second coil end that mainly repeats the connection pattern
A plurality of U-shaped segments are formed at the ends of the second coil.
End of the other of said U-shaped segments of each other in the end group
Are joined to form a plurality of joints,
The joint portions are arranged in a multiple ring shape, and the second joint
Within the il-end group, they are
Are spaced apart from each other, and further, the plurality of conductor segments at the coil end are arranged.
And the ventilation direction of the cooling air in the frame.
They are arranged so that they extend in a crossed manner, and are also spaced apart from each other.
Are arranged in rows to form a plurality of conductor cells at the coil end.
A configuration is provided in which cooling air flows across the magnets and the plurality of slots are aligned with the magnetic pole pitch of the field rotor.
Correspondingly spaced multiple slots for one phase slot group
As a first slot set consisting of slots for multiple phases
And further, a predetermined electrical angle deviation from the first slot set
A second slot set and the multi-phase stator winding is included in the first slot set.
The plurality of conductor segments housed in the slot group
Form a first winding and include a second winding in the second slot set.
A plurality of conductor segments housed in the slot group
The second winding is formed by the ment and the plurality of slot groups included in the first slot set are
Rectify and output the ac output of the stored multiphase first winding
The first rectifier that operates, and the second rectifier included in the second slot set.
Number of the multi-phase second windings housed in the slot group
A second rectifier that rectifies and outputs an AC output,
The rectified output of the first rectifier and the rectified output of the second rectifier
It is synthesized and output, and the number of slots of the stator core is set to 97.
AC generator for vehicles to collect. 5. NS poles are formed alternately along the circumferential direction of rotation.
Field rotor and stator iron arranged to face the rotor
The core and the multi-phase stator windings equipped on this stator core
The stator provided and the frame supporting the rotor and the stator.
In a vehicular alternator, the field rotor provides the north pole and the south pole.
The stator core comprises a Lundell-type iron core having a plurality of claw-shaped magnetic poles, and the stator iron core includes a plurality of slots extending through the laminated plates.
Comprising a laminated iron heart bets is formed, the polyphase stator winding comprises a plurality of conductor segments,
The plurality of conductor segments are arranged in the slot in the depth direction of the slot.
For the inner and outer layers, one or more pairs are arranged.
And are housed in the slots insulated from each other.
Ri, in the outside of the slot, on the end face side of the stator core
It is extended and arranged, and the NS magnetic pole pick of the rotor is arranged.
Series connection of different layers in spaced slots
The coil end is formed by the connection pattern
As a result, the connecting pattern is formed on the end face side of the stator core.
The coil end group that mainly repeats
In addition, the plurality of conductor segments at the coil end are
And the ventilation direction of the cooling air in the frame.
They are arranged so that they extend in a crossed manner, and are also spaced apart from each other.
Are arranged in rows to form a plurality of conductor cells at the coil end.
A configuration is provided in which cooling air flows across the magnets and the plurality of slots are aligned with the magnetic pole pitch of the field rotor.
Correspondingly spaced multiple slots for one phase slot group
As a first slot set consisting of slots for multiple phases
And further, a predetermined electrical angle deviation from the first slot set
A second slot set and the multi-phase stator winding is included in the first slot set.
The plurality of conductor segments housed in the slot group
Form a first winding and include a second winding in the second slot set.
A plurality of conductor segments housed in the slot group
The second slot is formed by the
Of the multi-phase contained in the plurality of slot groups included in the set
Included in the output of the first winding and the second slot set
The polyphase second winding housed in the plurality of slot groups
The output of the coil end is combined and output, and the coil end is formed as a predetermined layer in the first slot.
From the arranged first electrical conductor and said first slot,
Separated according to the magnetic pole pitch of the NS pole of the field magnet rotor
As a layer different from the first electric conductor in the second slot
Connection pattern for connecting in series with the arranged second electric conductor
And formed from the first slot
An end of the first electrical conductor that extends and the second slot
The end portion of the second electric conductor extending from
And the first electrical conductor and the second electrical conductor
Is provided by a separate conductor segment,
The distance between the ends of one electric conductor is half the magnetic pole pitch.
Has an angle and a length that circulate at least about 2 and the conductor segments project from both sides of the slot.
It is a segment with two ends,
At one end, as the end of the first electric conductor,
One end of the first segment and the end of the second electric conductor
To join with one end of the second segment as a part
One coil end is formed as a connection pattern,
At the other end of the stator core, the first electrical conductor is
The other end of the first segment as the end of the body and the other
The other of the third segment as the end of the second electric conductor
The joint with the end of the
The number of slots in the stator core is set to 96 while the loop end is formed.
AC generator for vehicles to collect. 6. NS poles are alternately formed along the circumferential direction of rotation.
Field rotor and stator iron arranged to face the rotor
The core and the multi-phase stator windings equipped on this stator core
The stator provided and the frame supporting the rotor and the stator.
In a vehicular alternator, the field rotor provides the north pole and the south pole.
The stator core comprises a Lundell-type iron core having a plurality of claw-shaped magnetic poles, and the stator iron core includes a plurality of slots extending through the laminated plates.
A multi-layer stator winding , wherein the multi-phase stator winding includes a plurality of conductor segments,
The plurality of conductor segments are arranged in the slot in the depth direction of the slot.
For the inner and outer layers, one or more pairs are arranged.
And are housed in the slots insulated from each other.
Ri, in the outside of the slot, on the end face side of the stator core
It is extended and arranged, and the NS magnetic pole pick of the rotor is arranged.
Series connection of different layers in spaced slots
The coil end is formed by the connection pattern
As a result, the connecting pattern is formed on the end face side of the stator core.
The coil end group that mainly repeats
In addition, the plurality of conductor segments at the coil end are
And the ventilation direction of the cooling air in the frame.
They are arranged so that they extend in a crossed manner, and are also spaced apart from each other.
Are arranged in rows to form a plurality of conductor cells at the coil end.
A configuration is provided in which cooling air flows across the magnets and the plurality of slots are aligned with the magnetic pole pitch of the field rotor.
Correspondingly spaced multiple slots for one phase slot group
As a first slot set consisting of slots for multiple phases
And further, a predetermined electrical angle deviation from the first slot set
A second slot set and the multi-phase stator winding is included in the first slot set.
The plurality of conductor segments housed in the slot group
Form a first winding and include a second winding in the second slot set.
A plurality of conductor segments housed in the slot group
The second slot is formed by the
Of the multi-phase contained in the plurality of slot groups included in the set
Included in the output of the first winding and the second slot set
The polyphase second winding housed in the plurality of slot groups
The output of the coil end is combined and output, and the coil end is formed as a predetermined layer in the first slot.
From the arranged first electrical conductor and said first slot,
Separated according to the magnetic pole pitch of the NS pole of the field magnet rotor
As a layer different from the first electric conductor in the second slot
Connection pattern for connecting in series with the arranged second electric conductor
And formed from the first slot
An end of the first electrical conductor that extends and the second slot
The end portion of the second electric conductor extending from
And the first electrical conductor and the second electrical conductor
Is provided by a separate conductor segment,
The distance between the ends of one electric conductor is half the magnetic pole pitch.
Has an angle and a length that circulate at least about 2 and the conductor segments project from both sides of the slot.
It is a segment with two ends,
At one end, as the end of the first electric conductor,
One end of the first segment and the end of the second electric conductor
To join with one end of the second segment as a part
One coil end is formed as a connection pattern,
At the other end of the stator core, the first electrical conductor is
The other end of the first segment as the end of the body and the other
The other of the third segment as the end of the second electric conductor
The joint with the end of the
The number of slots in the stator core is set to 97 while the loop end is formed.
AC generator for vehicles to collect. 7. NS poles are alternately formed along the circumferential direction of rotation.
Field rotor and stator iron arranged to face the rotor
The core and the multi-phase stator windings equipped on this stator core
A stator provided, and supports the rotor and the stator
In a vehicular AC generator having a frame, the stator iron core includes a compound housing the multi-phase stator winding.
Number of slots are formed, and the plurality of slots are defined by the magnetic pole pitch of the field rotor.
Slots for one phase are separated by multiple slots corresponding to
As a group, a first slot group consisting of a multi-phase slot group
And further, a predetermined electrical angle deviation from the first slot set
And a second set of slots, the polyphase stator winding connecting a plurality of conductor segments.
And each of these plurality of conductor segments is
Accommodated in slots separated according to the NS magnetic pole pitch
Is a substantially U-shaped segment having two straight portions
In the slot, in the depth direction of the slot
Only the inner layer and the inner layer are arranged in the slot in the depth direction of the slot.
And the outer layers are arranged in two or more pairs, and
They are housed in a container insulated from each other, and outside the slot, a plurality of U-shaped segment
The turn portion of the rotor is mounted on the shaft from one end surface side of the stator core.
Are arranged so as to project in the same direction and are spaced apart from each other.
To form a plurality of first coil end groups, and the ends of the plurality of U-shaped segments are connected to the stator core.
Is arranged so as to extend to the other end face side of the field rotor.
Different layers in spaced slots corresponding to the pole pitch of
A plurality of second coil end groups connected in series
And the ends of the plurality of U-shaped segments are
The other U-shaped segments on the other end face side of each other
Is joined to the end of the to form a plurality of joints.
The joints of are arranged in multiple rings and
Regarding the circumferential direction and radial direction in the 2 coil end group
And the multiphase stator windings are included in the first slot set.
The plurality of conductor segments housed in the slot group
Form a first winding and include a second winding in the second slot set.
A plurality of conductor segments housed in the slot group
The second slot is formed by the
Of the multi-phase contained in the plurality of slot groups included in the set
Included in the output of the first winding and the second slot set
The polyphase second winding housed in the plurality of slot groups
Is connected so as to be combined with the output of the first coil end, and is further connected by the first and second coil ends.
Substantially equal heat dissipation for all windings of the slot group
The number of slots in the stator core is set to 96.
AC generator for vehicles to collect. 8. NS poles are alternately formed along the circumferential direction of rotation.
Field rotor and stator iron arranged to face the rotor
The core and the multi-phase stator windings equipped on this stator core
A stator provided, and supports the rotor and the stator
In a vehicular AC generator having a frame, the stator iron core includes a compound housing the multi-phase stator winding.
Number of slots are formed, and the plurality of slots are defined by the magnetic pole pitch of the field rotor.
Slots for one phase are separated by multiple slots corresponding to
As a group, a first slot group consisting of a multi-phase slot group
And further, a predetermined electrical angle deviation from the first slot set
And a second set of slots , the polyphase stator winding connecting a plurality of conductor segments.
And each of these plurality of conductor segments is
Accommodated in slots separated according to the NS magnetic pole pitch
Is a substantially U-shaped segment having two straight portions
In the slot, in the depth direction of the slot
Are arranged only in the slot, and within the slot, the slot
Two or more pairs of inner and outer layers in the depth direction
Arranged in pairs and insulated from each other in the slot
A plurality of the U-shaped segments are stored outside the slot.
The turn portion of the rotor is mounted on the shaft from one end surface side of the stator core.
Are arranged so as to project in the same direction and are spaced apart from each other.
To form a plurality of first coil end groups, and the ends of the plurality of U-shaped segments are connected to the stator core.
Is arranged so as to extend to the other end face side of the field rotor.
Different layers in spaced slots corresponding to the pole pitch of
A plurality of second coil end groups connected in series
And the ends of the plurality of U-shaped segments are
The other U-shaped segments on the other end face side of each other
Is joined to the end of the to form a plurality of joints.
The joints of are arranged in multiple rings and
Regarding the circumferential direction and radial direction in the 2 coil end group
And the multiphase stator windings are included in the first slot set.
The plurality of conductor segments housed in the slot group
Form a first winding and include a second winding in the second slot set.
A plurality of conductor segments housed in the slot group
The second slot is formed by the
Of the multi-phase contained in the plurality of slot groups included in the set
Included in the output of the first winding and the second slot set
The polyphase second winding housed in the plurality of slot groups
Is connected so as to be combined with the output of the first coil end, and is further connected by the first and second coil ends.
Substantially equal heat dissipation for all windings of the slot group
In addition to having a surface area that contributes to the
AC onset electric vehicle and butterflies.