JP7204412B2 - toroidal wound motor - Google Patents

Description

The present invention corresponds to a stator core in which a plurality of inner teeth and outer teeth protrude from the inner circumference and outer circumference of an annular yoke, respectively; a yoke corresponding portion disposed at a portion corresponding to the yoke; and the inner teeth. an insulating member that covers an end portion along the axial direction of the stator core, and has a plurality of inner tooth corresponding portions arranged in a portion and a plurality of outer tooth corresponding portions arranged in a portion corresponding to the outer teeth; A first-phase coil portion, a second-phase coil portion, and a third-phase coil portion are wound by toroidal winding in order in the circumferential direction on the yoke and the yoke-corresponding portion between the inner teeth corresponding portions and between the outer teeth corresponding portions, respectively. A phase coil portion, a plurality of first phase transition wires connecting the first phase coil portions, a plurality of second phase transition wires connecting the second phase coil portions, and a plurality of third phase coil portions connecting the The present invention relates to a toroidal wound electric motor comprising: a first phase winding, a second phase winding, and a third phase winding each having a plurality of third phase crossover wires and connected in a Y-connection system.

Such a toroidal wound electric motor is already known from Patent Document 1 and the like.

Japanese Patent No. 4788769

In the technique disclosed in Patent Document 1, the insulating member is provided with a plurality of grooves and a plurality of guide posts, and the connecting wire of the first phase winding passes through the grooves to the coils of the second and third phase windings. The connecting wire of the second phase winding is guided by a guide post and passes outside the coil portion of the first phase winding, and passes inside the coil portion of the third phase winding by means of a groove. The crossover wire of the three-phase winding is guided by a guide post and passes outside the coil parts of the first and second phase windings. They are wired so as to intersect each other at the portions corresponding to the yokes. Such an arrangement structure of the crossover wire is permitted in the case of a single wire winding as disclosed in Patent Document 1 and the protruding length of the teeth is smaller than the width of the yoke. In the case of using, for example, a parallel-wound wire material in which 10 wires are bundled in order to allow a large current to flow through the yoke, problems arise in that the yoke becomes larger in the width direction and interference between the connecting wires. In addition, the connecting wire of the third phase winding is guided by the guide post and exposed to the outer peripheral side of the stator core. The connecting wire exposed on the outer peripheral side of the stator core becomes an obstacle, making it difficult to configure the cooling jacket.

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances. It is an object of the present invention to provide a toroidal wound motor that can avoid

In order to achieve the above object, the present invention provides a stator core comprising a plurality of inner teeth and outer teeth protruding from the inner and outer peripheries of an annular yoke;
A yoke corresponding portion arranged in the portion corresponding to the yoke, a plurality of inner teeth corresponding portions arranged in the portion corresponding to the inner teeth, and a plurality of outer teeth corresponding portions arranged in the portions corresponding to the outer teeth and an insulating member covering the axial end of the stator core;
A first-phase coil portion, a second-phase coil portion, and a second-phase coil portion, which are wound by toroidal winding in order in the circumferential direction on the yoke and the yoke-corresponding portions between the inner tooth-corresponding portions and the outer tooth-corresponding portions, respectively. a three-phase coil portion, a plurality of first-phase crossover wires connecting the first-phase coil portions, a plurality of second-phase crossover wires connecting the second-phase coil portions, and a plurality of third-phase coil portions. A first-phase winding, a second-phase winding, and a third-phase winding connected in a Y-connection system, each having a plurality of connecting third-phase crossover wires:
In a toroidal wound motor comprising
The first phase winding, the second phase winding and the third phase winding are made of parallel winding wire,
Projecting lengths of the inner teeth and the outer teeth from the yoke are set larger than the width of the yoke,
The inner tooth corresponding portion is provided with an inner protruding portion that protrudes further outward than the yoke corresponding portion in the direction along the axis and has a protruding end portion at an outer end along the radial direction of the stator core, the inner protruding portion corresponding to the outer tooth. an outer protruding portion protruding outwardly from the yoke corresponding portion in the direction along the axis and having a protruding end at the outer end along the radial direction of the stator core ;
The yoke includes a first guide portion that guides the first phase connecting wire extending from the first phase coil portion so as to pass through insides of the second phase coil portion and the third phase coil portion in a direction along the axis. formed in the corresponding part,
A second guide portion is formed in the yoke corresponding portion to guide the second phase connecting wire extending from the second phase coil portion so as to pass through the inner side of the third phase coil portion in a direction along the axis, and The second phase-crossing wire is connected from the second guide portion to one of the inner protruding portion and the outer protruding portion arranged between the third-phase coil portion and the first-phase coil portion. is inclined so as to approach the outer end surface of the inner tooth corresponding portion or the outer tooth corresponding portion in the direction along the axis line as it approaches the protruding end . A direction along the axis is formed on an outer end surface of one of the protruding ends of the inner protruding portion and the outer protruding portion formed on both sides of the first phase coil portion in the direction along the axis. forming a fourth guide portion that guides the second phase connecting wire from the third guide portion so as to straddle the first phase coil portion from the outside,
A fifth guide portion guides the third-phase connecting wire extending from the third-phase coil portion so as to straddle the first-phase coil portion and the second-phase coil portion from the outside in a direction along the axis. The inner side arranged between the three-phase coil section and the first-phase coil section, between the first-phase coil section and the second-phase coil section, and between the second-phase coil section and the third-phase coil section, respectively A first feature is that the protrusion is formed on the outer end surface of the protruding end of the other of the protruding portion and the outer protruding portion in the direction along the axis.

In addition to the configuration of the first characteristic, the present invention is characterized in that the first guide portion and the second guide portion are composed of the yoke corresponding portion and the first phase connecting wire and the second phase connecting wire made of a parallel winding material. Together with a wall portion which is higher than the thickness of the connecting wire and integrally formed with the insulating member so as to stand up from the yoke corresponding portion, it is formed in a gutter shape and is adjacent to the yoke corresponding portion radially inside and outside. A second feature is that the

A third feature of the present invention is that, in addition to the configuration of the second feature, the wall portion is formed integrally with at least one of the inner protruding portion and the outer protruding portion.

In addition to any one of the first to third characteristics, the present invention provides the stator core in such a manner that a first phase connecting wire extending from the first phase coil portion is guided to the first guide portion side. a first guide surface extending so as to obliquely intersect with the radial direction is formed on the other of the inner raised portion and the outer raised portion between the first phase coil portion and the second phase coil portion; A second guide surface extending to obliquely intersect with the radial direction of the stator core so as to guide a second phase transition wire extending from the second phase coil portion toward the second guide portion side is provided with the second guide surface. A fourth feature is that it is formed in either one of the inner raised portion and the outer raised portion between the phase coil portion and the third phase coil portion.

Further, in addition to any one of the configurations of the first to fourth characteristics, the present invention is characterized in that the stator core is shrink-fitted in a cylindrical cooling sleeve, and the outer tooth corresponding portion selected from the plurality of outer tooth corresponding portions is selected. A U-shaped notch portion is formed in the protruding end portion of the portion, and the first phase transition wire, the second phase transition wire and the third phase transition wire are positioned so as to avoid overlapping with the notch portion. A fifth feature is that it is arranged in the .

According to the first feature of the present invention, the insulating member covering the end portion along the axial direction of the stator core in which the inner teeth and the outer teeth protrude from the yoke is longer than the width of the yoke. A plurality of inner tooth correspondences each corresponding to the inner teeth and the outer teeth having an arranged yoke corresponding portion and an inner protruding portion and an outer protruding portion protruding outwardly from the yoke corresponding portion in a direction along the axis. and outer tooth corresponding portions are provided, the first, second and third phase windings are made of parallel winding wire material, and the first phase connecting wire is passed through the inside of the second phase coil portion and the third phase coil portion. A first guide portion is formed in the yoke corresponding portion to guide the second phase connecting wire so as to pass through the inside of the third phase coil portion, and a second guide portion is formed in the yoke corresponding portion to guide the second phase connecting wire so as to pass through the inside of the third phase coil portion. and a second phase crossover wire on one of the inner protuberant portion and the outer protuberant portion, which are arranged between the third phase coil portions and have a protruding end portion at the outer end along the radial direction of the stator core. A third guide portion that guides from the second guide portion to the protruding end portion side of the one protruding portion moves the inner teeth corresponding portion or the outer teeth corresponding portion outward in the direction along the axis line as it approaches the protruding end portion. on the outer end surface in the direction along the axis line of one of the protruding ends of the inner protruding portion and the outer protruding portion formed on both sides of the third phase coil portion and formed so as to be inclined toward the end face; A fourth guide portion that guides the second phase crossover wire from the third guide portion is formed so as to straddle the first phase coil portion from the outside in the direction along the axis, and the third phase crossover wire extends from the first phase coil portion and the third phase crossover wire. The fifth guide portion that guides the two-phase coil portion so as to straddle the two-phase coil portion from the outside is formed on the outer end surface of the protruding end portion of the other of the inner protruding portion and the outer protruding portion in the direction along the axis . There is no point where the phase, second phase, and third phase connecting wires cross each other, and there is a step between the yoke corresponding portion and the inner and outer protrusions, so the second phase coil portion and the third phase coil The first phase crossover wire passing inside the part and the part of the second phase crossover wire passing inside the third phase coil part are prevented from interfering with the second phase coil part and the third phase coil part, Interference between crossover wires can be avoided, and an increase in size of the yoke can be avoided even if parallel windings are used. Moreover, the third phase crossover wire is also not exposed on the outer peripheral side of the stator core.

According to the second feature of the present invention, the first guide portion and the second guide portion are formed by a wall portion higher than the thickness of the first phase transition wire and the second phase transition wire, and a yoke corresponding portion. In the narrow space of the yoke-corresponding portion, the first phase-crossing wire and the second phase-crossing wire can be affixed with an insulating sheet or the like while avoiding mutual interference. can be efficiently arranged as unnecessary.

According to the third feature of the present invention, since the wall is integrally connected to at least one of the inner raised portion and the outer raised portion, the rigidity of the yoke corresponding portion and the wall can be ensured.

According to the fourth feature of the present invention, the first guide surface that guides the first phase connecting wire toward the first guide portion obliquely intersects the radial direction of the stator core is the first phase coil portion. and the other of the inner protruding portion and the outer protruding portion between the second phase coil portions, and intersects diagonally with the radial direction of the stator core so as to guide the second phase transition line toward the second guide portion side Since the second guide surface is formed on one of the inner protruding portion and the outer protruding portion between the second phase coil portion and the third phase coil portion, the first phase connecting wire and the second phase connecting wire are The phase coil portion and the second phase coil portion can be smoothly guided to the first guide portion and the second guide portion.

Furthermore, according to a fifth feature of the present invention, the stator core is shrink-fitted in a cylindrical cooling sleeve, and a plurality of outer tooth corresponding portions selected from among the plurality of outer tooth corresponding portions have U-shaped protruding ends. The notches are formed, and the first, second, and third phase transition wires are arranged in positions to avoid overlapping with the notches, so that the stator core with the insulating member attached can be It can be easily pushed into the cooling sleeve with a jig inserted into the notch.

1 is a longitudinal sectional view of a toroidal wound electric motor; FIG. FIG. 4 is a front view of the stator with a part of the insulating member cut away; It is a figure which shows some insulating members. It is a figure which shows the winding process of a 1st phase winding, a 2nd phase winding, and a 3rd phase winding one by one.

An embodiment of the present invention will be described with reference to the attached FIGS. 1 to 4. First, in FIG. A casing 8 that houses the rotor 6 and the stator 7 is provided.

The casing 8 includes a cylindrical portion 8a coaxial with the axis of the stator 7, a first inward brim portion 8b projecting radially inward from one end (left end in FIG. 1) of the cylindrical portion 8a, A short cylindrical first bearing housing portion 8c continues to the inner periphery of the first inward flange portion 8b, and projects radially outward from the other end portion (right end portion in FIG. 1) of the cylindrical portion 8a. A first outward flange portion 8d, reinforcing ribs 8e protruding at a plurality of locations (for example, eight locations) at equal intervals in the circumferential direction of the outer periphery of the cylindrical portion 8a, and circumferentially extending the cylindrical portion 8a. Support projections 8f projecting radially outward from the first outward brim 8d at a plurality of equally spaced locations (for example, four locations) are integrally formed of a light metal such as aluminum. .

The reinforcing rib 8e is formed on the first outward flange portion 8d so that the radially outward protrusion amount from the cylindrical portion 8a increases from one end to the other end of the cylindrical portion 8a. The support protrusions 8f extend from the first outward flange portion 8d between the reinforcing ribs 8e that form a pair adjacent to each other in the circumferential direction of the first outward flange portion 8d. Projects radially outward.

One end of a rotary shaft 10 provided coaxially with the rotor 6 passes through the central portion of the first inward brim portion 8b. A ball bearing 11 is interposed. A resolver 12 surrounding the protrusion of the rotating shaft 10 from the first inward brim portion 8b is supported in the central portion of the first inward brim portion 8b. A cover 13 for covering one end of from the outside is attached to the central outer surface of the first inward brim portion 8b.

A cylindrical cooling sleeve 14 is inserted between the cylindrical portion 8 a of the casing 8 and the stator 7 . At the end of the cooling sleeve 14 opposite to the first inward flange 8b, a second inward flange 14a projecting radially inward from the end of the cooling sleeve 14; A second outward flange portion 14b projecting radially outward so as to overlap the first outward flange portion 8d of the casing 8 is integrally connected to the second outward flange portion 8d. A short cylindrical second bearing housing portion 14c to which a second ball bearing 20 interposed between the flange portion 14a and the rotating shaft 10 is mounted is integrally formed on the inner periphery of the flange portion 14a. At a plurality of locations (for example, four locations) equidistantly spaced in the circumferential direction of the outward flange 14b, there are mounting projections projecting radially outward so as to overlap the support projections 8f of the casing 8 from the outside. A portion 14d is integrally protruded. The mounting protrusions 14d are fastened to the support protrusions 8f with a plurality of bolts 15 each.

On the outer surface of the cooling sleeve 14, an annular first seal projection is fitted on the outer periphery of the annular first seal member 16 that elastically contacts the inner surface of one end of the cylindrical portion 8a of the casing 8. 18 and an annular second seal member 19 which is in elastic contact with the inner surface of the other end of the cylindrical portion 8a are fitted to the outer periphery of the second annular seal member 19 which is connected to the second outward flange portion 14b. , and a plurality of, for example five, cooling fins 22 extending in the circumferential direction are arranged at equal intervals between the first and second seal projections 18 and 21 .

The cooling fins 22 protrude from the outer surface of the cooling sleeve 14 so as to abut, approach, or face the inner surface of the cylindrical portion 8 a of the casing 8 . By inserting between the cylindrical portion 8a and the stator 7, a plurality of, for example, six, cooling channels 23 are formed between the cooling sleeve 14 and the cylindrical portion 8a for circulating the cooling fluid along the cooling fins 22. be done.

In the cylindrical portion 8a of the casing 8, a cooling fluid introduction pipe 24 for introducing a cooling body to one end in the circumferential direction of the cooling channel 23 and a cooling body to lead out from the other end in the circumferential direction of the cooling channel 23. A cooling fluid lead-out pipe 25 is connected to the cylindrical portion 8a so as to protrude sideways from the cylindrical portion 8a.

Also referring to FIG. 2, the stator 7 includes a stator core 26, a pair of insulating members 27 that cover axial ends of the stator core 26, and a pair of insulating members 27 that are wound around the stator core 26 via the insulating members 27. and a first phase winding 28, a second phase winding 29 and a third phase winding 30 which are connected in a Y-connection system. It consists of a para-wound wire rod bundled with a wire rod.

The stator core 26 is formed by stacking a plurality of iron core plates, and includes an annular yoke 31 surrounding the rotor 6 and a plurality of locations (this Inner teeth 32 projecting from 36 locations in the embodiment) and outer teeth 33 projecting from a plurality of locations (36 locations in this embodiment) corresponding to the inner teeth 32 on the outer circumference of the yoke 31. are integrally provided, and lengths LA and LB of protrusions of the inner teeth 32 and the outer teeth 33 from the yoke 31 are set larger than the width W of the yoke 31 . Moreover, the stator core 26 is composed of three equally divided core pieces 34 in the circumferential direction, that is, the core pieces 34 formed in an arc shape of 120 degrees in the circumferential direction are connected to each other on the dashed line L shown in FIG. It consists of

Also referring to FIG. 3, the insulating members 27 are fitted and attached to both ends of the stator core 26 in the axial direction. Six insulating member pieces 35 are mounted on both ends of the stator core 26 at both ends in the axial direction.

The insulating member piece 35 includes a yoke corresponding portion 40 arranged at a portion corresponding to the yoke 31 of the stator core 26, and a portion corresponding to the inner teeth 32 and projecting from the yoke corresponding portion 40. The first, second, third, fourth and fifth inner tooth corresponding portions 41A, 41B, 41C, 41D and 41E are the same as the distances between the first to fifth inner tooth corresponding portions 41A to 41E. a first semi-inner teeth corresponding portion 43A protruding from the yoke corresponding portion 40 with a space of . A second semi-inner teeth corresponding portion 43B protruding from the yoke corresponding portion 40 with the same distance as the interval between 41A to 41E between itself and the fifth inner teeth corresponding portion 41E, and the outer side. first, second, third, fourth and fifth outer teeth corresponding portions 42A, 42B, 42C, 42D and 42E arranged at portions corresponding to the teeth 33 and projecting from the yoke corresponding portion 40; The first outer tooth corresponding portion 42A is spaced from the first outer tooth corresponding portion 42A at the same interval as the first to fifth outer tooth corresponding portions 42A to 42E. The half-outer teeth corresponding portion 44A and the first to fifth outer teeth corresponding portions 42A to 42E are spaced apart from the fifth outer teeth corresponding portion 42E to form the yoke corresponding portion. 40 and a second semi-outer tooth corresponding portion 44B protruding from 40 .

The first semi-inner teeth corresponding portion 43A and the second semi-inner teeth corresponding portion 43B cooperate to form a sixth inner teeth corresponding portion 41F when the insulating member pieces 35 are coupled to each other. The first half-outer teeth corresponding portion 44A and the second half-outer teeth corresponding portion 44B cooperate with the sixth outer teeth corresponding portion 42F when the insulating member pieces 35 are coupled to each other. configuration.

Each of the first to sixth inner teeth corresponding portions 41A to 41F protrudes further outward than the yoke corresponding portion 40 in the direction along the axis of the stator core 26 , and has an outer end along the radial direction of the stator core 26. Each of the first to sixth outer tooth corresponding portions 42A to 42F is provided with an inner protruding portion 45 having a projecting end portion, and extends outward from the yoke corresponding portion 40 in the direction along the axis of the stator core 26. Outer protuberances 46 are respectively provided that protrude and have projecting ends at the outer ends along the radial direction of the stator core 26 .

The first-phase winding 28, the second-phase winding 29, and the third-phase winding 30 are arranged in a state in which a pair of the insulating member pieces 35 are attached to both ends of the core piece 34 in the axial direction. be wrapped around.

A first phase winding 28, a second phase winding 29 and a third phase winding 30 are arranged between the first to sixth inner teeth corresponding portions 41A to 41F and between the first to sixth outer teeth corresponding portions. A first-phase coil portion 28a and a second-phase coil are toroidally wound in order in the circumferential direction, for example, counterclockwise in FIGS. portion 29a and a third-phase coil portion 30a, a plurality of first-phase transition wires 28b connecting between the first-phase coil portions 28a, a plurality of second-phase transition wires 29b connecting between the second-phase coil portions 29a, and Each has a plurality of third-phase crossover wires 30b that connect between the plurality of third-phase coil portions 30a, and is connected by a Y-connection method.

In this embodiment, as shown in FIG. 4A, the first phase coil portion 28a is arranged between the sixth and first inner teeth corresponding portions 41F, 41A and between the sixth and first outer teeth corresponding portions 42F. , 42A between the yoke 31 and the yoke corresponding portion 40, and between the third and fourth inner tooth corresponding portions 41C and 41D and between the third and fourth outer tooth corresponding portions 41C and 41D. Between 42C and 42D, the yoke 31 and the yoke corresponding portion 40 are wound by toroidal winding, and the second phase coil portion 29a corresponds to the first and second inner teeth as shown in FIG. The yoke 31 and the yoke corresponding portion 40 are toroidally wound between the portions 41A and 41B and between the first and second outer tooth corresponding portions 42A and 42B, and the fourth and fifth inner teeth are wound. The yoke 31 and the yoke corresponding portion 40 are toroidally wound between the corresponding portions 41D and 41E and between the fourth and fifth outer tooth corresponding portions 42D and 42E. As shown in 4(c), the yoke 31 and the yoke corresponding portion 40 are arranged between the second and third inner tooth corresponding portions 41B and 41C and between the second and third outer tooth corresponding portions 42B and 42C. , and the yoke 31 and the yoke corresponding portion are wound between the fifth and sixth inner tooth corresponding portions 41E and 41F and between the fifth and sixth outer tooth corresponding portions 42E and 42F. 40 with toroidal winding.

In the yoke corresponding portion 40, the first phase connecting wire 28b extending from the first phase coil portion 28a is connected in a direction along the axis of the stator core 26 to the second phase coil portion 29a and the third phase coil portion. First guide portions 47A and 47B are formed to guide the inside of 30a. In this embodiment, winding ends of the first phase coil portion 28a located between the sixth and first inner teeth corresponding portions 41F, 41A and between the sixth and first outer teeth corresponding portions 42F, 42A are located on the side of the first inner teeth corresponding portion 41A, between the sixth and first inner teeth corresponding portions 41F, 41A and between the sixth and first outer teeth corresponding portions 42F, 42A. A first guide portion 47A that guides the first phase transition wire 28b extending from the first phase coil portion 28a is arranged near the inner periphery of the yoke corresponding portion 40. As shown in FIG. Further, the winding end portion of the first phase coil portion 28a between the third and fourth inner tooth corresponding portions 41C and 41D and between the third and fourth outer tooth corresponding portions 42C and 42D is the third coil portion. 4, between the third and fourth inner tooth corresponding portions 41C and 41D and between the third and fourth outer tooth corresponding portions 42C and 42D. A first guide portion 47B for guiding the first phase connecting wire 28b extending from the coil portion 28a is arranged near the outer circumference of the yoke corresponding portion 40. As shown in FIG.

Further, the second phase connecting wire 29b extending from the second phase coil portion 29a is passed through the yoke corresponding portion 40 in the direction along the axis of the stator core 26 inside the third phase coil portion 30a. Second guide portions 48A and 48B are formed for guiding. In this embodiment, winding end portions of the second phase coil portion 29a located between the first and second inner tooth corresponding portions 41A, 41B and between the first and second outer tooth corresponding portions 42A, 42B is on the side of the second outer tooth corresponding portion 42B, and is present between the first and second inner tooth corresponding portions 41A and 41B and between the first and second outer tooth corresponding portions 42A and 42B. A second guide portion 48B for guiding the second phase transition wire 29b extending from the coil portion 29a extends radially of the stator core 26 in the first and second guide portions 48B in the portions corresponding to the second and third outer teeth corresponding portions 42B and 42C. It is arranged near the outer periphery of the yoke portion 40 so as to be arranged adjacent to the outside of the guide portion 47A. Further, the winding end portion of the second phase coil portion 29a between the fourth and fifth inner tooth corresponding portions 41D and 41E and between the fourth and fifth outer tooth corresponding portions 42D and 42E is the fifth inner tooth corresponding portion. Extending from the second phase coil portion 29a located on the tooth corresponding portion 41E side and between the fourth and fifth inner tooth corresponding portions 41D and 41E and between the fourth and fifth outer tooth corresponding portions 42D and 42E. The second guide portion 48A, which guides the output second phase transition wire 29b, is arranged inside the first guide portion 47B in the radial direction of the stator core 26 at portions corresponding to the fifth and sixth inner teeth corresponding portions 41E, 41F. is arranged near the inner circumference of the yoke portion 40 so as to be arranged adjacent to the .

Further , the second phase connecting wire 29b is connected to either one of the inner protruding portion 45 and the outer protruding portion 46 arranged between the third phase coil portion 30a and the first phase coil portion 28a. The third guide portions 49A, 49B leading from 47A, 47B to the protruding end side of the one protruding portion move toward the inner teeth corresponding portions 41C, 41F or the outer teeth corresponding portions 42C, 42F as they approach the protruding end. It is inclined so as to approach the outer end surface in the direction along the axis . In this embodiment, between the third phase coil portion 30a and the first phase coil portion 28a are the third and sixth inner teeth corresponding portions 41C and 41F and the third and sixth outer teeth corresponding portions 41C and 41F. Teeth corresponding portions 42C and 42F are arranged, a third guide portion 49B is formed on the outer raised portion 46 of the third outer teeth corresponding portion 42C, and an inner raised portion 45 of the sixth inner teeth corresponding portion 41F is formed. A third guide portion 49A is formed in the .

Further, the outer end face in the direction along the axis of the stator core 26 of the projecting end of one of the inner protruding portion 45 and the outer protruding portion 46 arranged on both sides of the first phase coil portion 28a has the above-mentioned Fourth guide portions 50A and 50B are formed to guide the second phase connecting wire 29b from the third guide portions 49A and 49B so as to straddle the first phase coil portion 28a from the outside in the direction along the axis of the stator core 26. . In this embodiment, on both sides of the first phase coil portion 29a, the sixth inner tooth corresponding portion 41F and the first inner tooth corresponding portion 41A, the sixth outer tooth corresponding portion 42F and the first One outer teeth corresponding portion 42A, the third inner teeth corresponding portion 41C, the fourth inner teeth corresponding portion 41D, the third outer teeth corresponding portion 42C, and the fourth outer teeth corresponding portion 42D. A fourth guide portion 50A is formed at the projecting end portion of the inner raised portion 45 of the sixth and first inner teeth corresponding portions 41F, 41A, and the third and fourth outer teeth corresponding portions 42C, 42D. A fourth guide portion 50B is formed at the protruding end portion of the outer raised portion 46 of .

Between the third phase coil portion 30a and the first phase coil portion 28a, between the first phase coil portion 28a and the second phase coil portion 29a, and between the second phase coil portion 29a and the third phase coil portion 30a On the outer end surface in the direction along the axis of the stator core 26 of the other protruding end of the inner protruding portion 45 and the outer protruding portion 46 respectively arranged therebetween, from the third phase coil portion 30a. Fifth guide portions 51A and 51B are formed to guide the extended third phase transition wire 30b so as to straddle the first phase coil portion 28a and the second phase coil portion 29a from the outside in the direction along the axis. In this embodiment, the inner sides of the third, fourth and fifth inner tooth corresponding portions 41C, 41D and 41E arranged between the third phase coil portion 30a and the first phase coil portion 28a A fifth guide portion 51A is formed in a groove shape at the protruding end of the protruding portion 45, and protruding ends of the outer protruding portions 46 of the sixth, first and second outer tooth corresponding portions 42F, 42A, 42B A groove-shaped fifth guide portion 51B is formed in the portion.

By the way, the first guide portions 47A, 47B and the second guide portions 48A, 48B are determined by the thickness of the yoke corresponding portion 40 and the first phase connecting wire 28b and the second phase connecting wire 29b made of parallel winding material. The first, second, and second insulating member pieces 35 of the insulating member 27 are formed integrally with the insulating member piece 35 of the insulating member 27 so as to rise from the yoke-corresponding portion and continue to at least one of the inner protruding portion 45 and the outer protruding portion 46 . The third and fourth walls 52 , 53 , 54 , 55 form a wire gutter shape and are arranged adjacent to each other in the radial direction of the yoke corresponding portion 40 . Moreover, the first to fourth wall portions 52 to 55 are formed integrally with at least one of the inner raised portion 45 and the outer raised portion 46 .

The first guide portions 47A, 47B are formed by first, second and third wall portions 52A, 52B; 53A, 53B; In this embodiment, the first phase coil portion 28a is located between the sixth and first inner teeth corresponding portions 41F, 41A and between the sixth and first outer teeth corresponding portions 42F, 42A. The first guide portion 47A, which guides the first transition wire 28b, has both ends integrally connected to the outer raised portion 46 of the first outer tooth corresponding portion 42A and the outer raised portion 46 of the third outer tooth corresponding portion 42C. A first wall portion 52B, which is tapered, and a second wall portion 53A, both ends of which are integrally connected to the inner raised portions 45 of the first and second inner tooth corresponding portions 41A, 41B, and the second and second wall portions 53A and 53A. A third wall portion 54</b>A having both ends integrally connected to the inner raised portions 45 of the inner teeth corresponding portions 41</b>B and 41</b>C of No. 3 and the yoke corresponding portion 40 . Further, the first phase derived from the first phase coil portion 28a between the third and fourth inner tooth corresponding portions 41C and 41D and between the third and fourth outer tooth corresponding portions 42C and 42D The first guide portion 47B, which guides the crossover wire 28b, has both ends integrally connected to the inner raised portion 45 of the fourth inner teeth corresponding portion 41D and the inner raised portion 45 of the sixth inner teeth corresponding portion 41F. The second wall portion 53B and the fifth and sixth outer tooth corresponding portions are integrally connected at both ends to the wall portion 52A, the outer raised portions 46 of the fourth and fifth outer tooth corresponding portions 42D and 42E. It is formed by the third wall portion 54B having both ends integrally connected to the outer raised portions 46 of the portions 42E and 42F, and the portion 40 corresponding to the yoke.

The second guide portions 48A, 48B are formed by the first and fourth wall portions 52A, 52B; 55A, 55B and the yoke corresponding portion 40 . In this embodiment, the second phase coil portion 29a between the first and second inner tooth corresponding portions 41A and 41B and between the first and second outer tooth corresponding portions 42A and 42B is extended from the second phase coil portion 29a. The second guide portion 48B for guiding the second phase transition wire 29b is formed with a fourth wall portion 55B having both ends integrally connected to the outer raised portions 46 of the second and third outer teeth corresponding portions 42B and 42C. , the first wall portion 52B having both ends integrally connected to the outer raised portion 46 of the first outer teeth corresponding portion 42A and the outer raised portion 46 of the third outer teeth corresponding portion 42C; From the second phase coil portion 29a formed with the yoke corresponding portion 40 and located between the fourth and fifth inner tooth corresponding portions 41D and 41E and between the fourth and fifth outer tooth corresponding portions 42D and 42E A second guide portion 48A for guiding the extended second phase transition wire 29b is a fourth wall having both ends integrally connected to the inner raised portions 45 of the fifth and sixth inner teeth corresponding portions 41E and 41F. the portion 55A, the first wall 52A having both ends integrally connected to the inner raised portion 45 of the fourth inner teeth corresponding portion 41D and the inner raised portion 45 of the sixth inner teeth corresponding portion 41F; It is formed with the yoke corresponding portion 40 .

Further, the first phase connecting wire 28b extending from the first phase coil portion 28a is guided toward the first guide portions 47A and 47B so as to obliquely cross the radial direction of the stator core 26. Guide surfaces 56A and 56B are formed on the other of the inner raised portion 45 and the outer raised portion 46 between the first phase coil portion 28a and the second phase coil portion 29a. A first guide surface 56A is formed on the inner raised portion 45 of the first inner teeth corresponding portion 41A, and a first guide surface 56B is formed on the outer raised portion 46 of the fourth outer teeth corresponding portion 42D.

Further, a second phase connecting wire 29b extending from the second phase coil portion 29a is guided toward the second guide portions 48A and 48B so as to obliquely cross the radial direction of the stator core 26. Guide surfaces 57A and 57B are formed on either one of the inner raised portion 45 and the outer raised portion 46 between the second phase coil portion 29a and the third phase coil portion 30a. A second guide surface 57B is formed on the outer raised portion 46 of the second outer teeth corresponding portion 42B, and a second guide surface 57A is formed on the inner raised portion 45 of the fifth inner teeth corresponding portion 41E.

By the way, the first phase winding 28, the second phase winding 29 and the third phase winding 30 are wound with the insulating member pieces 35 mounted in pairs on both ends of the core piece 34, respectively. First, second and third sub-assembly units 58A, 58B and 58C constructed by 3 sub-units 58A to 58C, the end of the first phase crossover wire 28b of the first phase winding 28, the end of the second phase crossover wire 29b of the second phase winding 29, and the end of the third phase winding 30 The termination of the three-phase crossover line 30b is connected at connection portions 59A, 59B, 59C arranged in the vicinity of the connecting portions of the first to third sub-assembly units 58A to 58C, that is, in the vicinity of the dashed line L shown in FIG.

A lead wire 60A connected to the first phase coil portion 28a at one end in the circumferential direction of each of the first to third sub-assembled units 58A to 58C is connected to a first phase winding terminal 61A. A lead wire 60B connected to the second phase coil portion 29a at one circumferential end of each of the sub-assembled units 58A to 58C is connected to a second phase winding terminal 61B. The lead wires 60C, which are connected to the third-phase coil portions 30a at one end in the circumferential direction, are connected to the third-phase winding terminals 61C.

The stator core 26 of the stator 7 is shrink-fitted to the cylindrical cooling sleeve 14, and the stator core 26 selected from the plurality of outer tooth corresponding portions 42A to 42F of the insulating member 27 of the stator 7 is selected from the outer tooth corresponding portions 42A to 42F. A jig for pushing in the stator core 26 with the insulating member 27 attached thereto is inserted into the protruding end portions of the outer teeth corresponding portions, which are the second and fifth outer teeth corresponding portions 42B and 42E in this embodiment. A U-shaped cutout portion 62 is formed to allow the placed in position.

Next, the operation of this embodiment will be described. First to sixth inner teeth corresponding portions 41A to 41F arranged at portions corresponding to the inner teeth 32 of the stator core 26, and first to sixth outer teeth corresponding to portions corresponding to the outer teeth 33 of the stator core 26. The inner side has tooth corresponding portions 42A to 42F, protrudes outward from the yoke corresponding portion 40 in the direction along the axis of the stator core 26, and has a projecting end at the outer end along the radial direction of the stator core 26. Protruding portions 45 are provided on the first to sixth inner teeth corresponding portions 41A to 41F, and protrude outward from the yoke corresponding portions 40 in the direction along the axis of the stator core 26 and in the radial direction of the stator core 26. The first to sixth outer tooth corresponding portions 42A to 42F are provided with outer raised portions 46 having protruding ends at the outer ends along the The yoke corresponding portion 40 is formed with first guide portions 47A and 47B which are made of parallel wire material and guide the first phase transition wire 28b so as to pass through the insides of the second phase coil portion 29a and the third phase coil portion 30a, Second guide portions 48A and 48B are formed in the yoke corresponding portion 40 to guide the second phase transition wire 29b so as to pass through the inside of the third phase coil portion 30a. Any one of the inner raised portion 45 and the outer raised portion 46 disposed therebetween (in this embodiment, the outer raised portion 46 of the third outer teeth corresponding portion 42C and the sixth inner teeth corresponding portion Third guide portions 49A and 49B are formed on the inner raised portion 45) of 41F to guide the second transition line 29b from the second guide portions 48A and 48B to the projecting end side of the one raised portion. and any one of the inner raised portion 45 and the outer raised portion 46 arranged on both sides of the first phase coil portion 28a (in this embodiment, the inner raised portions of the sixth and first inner teeth corresponding portions 41F and 41A) 45 and the third and fourth outer tooth corresponding portions 42C and 42D, the outer protruding portions 46) of the outer teeth corresponding portions 42C and 42D have their outer end surfaces in the direction along the axis of the first phase coil A fourth guide portion that guides the second phase connecting wire 29b from the third guide portions 49A and 49B so as to straddle the portion 28a from the outside. 50A and 50B are formed, and the fifth guide portions 51A and 51B that guide the third phase transition wire 30b so as to straddle the first phase coil portion 28a and the second phase coil portion 29a from the outside are formed by the inner raised portion 45 and the outer raised portion. 46 (in this embodiment, the inner raised portions 45 of the third, fourth and fifth inner tooth corresponding portions 41C, 41D and 41E and the sixth, first and second outer tooth corresponding portions 42F , 42A and 42B are formed on the outer end faces in the direction along the axis of the projecting ends of the outer raised portions 46).

Therefore, there are no points where the first-phase, second-phase and third-phase connecting wires 28b, 29b, 30b cross each other, and there is a step between the yoke corresponding portion 40 and the inner and outer raised portions 45, 46. Therefore, the first phase transition wire 28b passing inside the second phase coil portion 29a and the third phase coil portion 30a and the portion of the second phase transition wire 29b passing inside the third phase coil portion 30a are the second Interference with the phase coil portion 29a and the third phase coil portion 30a is avoided, interference between the first to third phase crossover wires 28b, 29b, and 30b is avoided, and parallel windings are used. Also, it is possible to avoid an increase in size of the yoke 31 . Moreover, the third phase connecting wire 30b is not exposed to the outer peripheral side of the stator core 26 either.

Further, the first guide portions 47A, 47B and the second guide portions 48A, 48B are determined by the thicknesses of the yoke corresponding portion 40 and the first phase connecting wire 28b and the second phase connecting wire 29b made of parallel winding material. First to fourth wall portions 52A, 52B; 53A, 53B; 54A, 54B; , 55B are arranged adjacent to each other in the radial direction of the yoke corresponding portion 40 while being formed in a gutter-like shape. The wires 29b can be arranged efficiently while avoiding mutual interference and eliminating the need to attach an insulating sheet or the like.

Moreover, the first to fourth wall portions 52A, 52B; 53A, 53B; 54A, 54B; , the rigidity of the yoke corresponding portion 40 and the first to fourth wall portions 52 to 55 can be ensured.

Further, the first phase connecting wire 28b extending from the first phase coil portion 28a is guided toward the first guide portions 47A and 47B so as to obliquely cross the radial direction of the stator core 26. The guide surfaces 56A and 56B are positioned between the first phase coil portion 28a and the second phase coil portion 29a and the other of the inner protruding portion 45 and the outer protruding portion 46 (in this embodiment, the first inner side). The second phase transition wire 29b formed on the inner raised portion 45 of the tooth corresponding portion 41A and the outer raised portion 46 of the fourth outer tooth corresponding portion 42D and extending from the second phase coil portion 29a is guided by the second guide. Second guide surfaces 57A and 57B extending so as to obliquely intersect the radial direction of the stator core 26 so as to lead toward the portions 48A and 48B are provided between the second phase coil portion 29a and the third phase coil portion 30a. (in this embodiment, the outer protruding portion 46 of the second outer teeth corresponding portion 42B and the inner protruding portion 45 of the fifth inner teeth corresponding portion 41E ), the first phase transition wire 28b and the second phase transition wire 29b are routed from the first phase coil portion 28a and the second phase coil portion 29a to the first guide portions 47A and 47B and the second guide portions 48A and 48B. can smoothly lead to

Further, the stator core 26 is shrink-fitted to the cylindrical cooling sleeve 14, and a plurality of outer teeth corresponding portions selected from the first to sixth outer teeth corresponding portions 42A to 42F in the insulating member 27. A U-shaped notch portion 62 is formed at the protruding end portion of the second and fourth outer tooth corresponding portions 42B, 42E, and the first phase connecting wire 28b, the second phase connecting wire 29b and the third phase connecting wire 29b are formed. Since the connecting wire 30b is arranged at a position to avoid overlapping with the notch portion 62, the stator core 26 with the insulating member 27 mounted thereon is inserted into the notch portion 62 by a jig for inserting the cooling sleeve. 14 can be easily pushed.

Furthermore, the first phase winding 28, the second phase winding 29, and the third phase winding 30 are wound in a state in which a pair of insulating member pieces 35 are attached to both ends of the core piece 34, respectively. The stator 7 is assembled by connecting the configured first, second and third sub-assembly units 58A, 58B and 58C to each other. The end of the first phase crossover wire 28b of the first phase winding 28, the end of the second phase crossover wire 29b of the second phase winding 29, and the end of the third phase crossover wire 30b of the third phase winding 30 are the Since the connections are made at the connection portions 59A, 59B, 59C arranged near the connection portions of the first to third sub-assembly units 58A to 58C, the first, second and third phase windings 28 to 30 of the stator 7 are connected to each other. The space factor of the toroidal winding can be increased, and the core pieces 34 formed by winding the first, second and third phase windings 28 to 30 with a uniform length can be joined together.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various design changes may be made without departing from the scope of the present invention described in the claims. is possible.

14... Cooling sleeve 26... Stator core 27... Insulating member 28... First phase winding 28a... First phase coil portion 28b... First phase connecting wire 29... Second Phase winding 29a Second phase coil portion 29b Second phase transition wire 30 Third phase winding 30a Third phase coil portion 30b Third phase transition wire 31 Yoke 32 inner teeth 33 outer teeth 40 yoke corresponding portions 41A, 41B, 41C, 41D, 41E, 41F inner teeth corresponding portions 42A, 42B, 42C, 42D, 42E, 42F... Outer teeth corresponding part 45... Inner protruding part 46... Outer protruding part 47A, 47B... First guide parts 48A, 48B... Second guide parts 49A, 49B... Third Guide portions 50A, 50B Fourth guide portions 51A, 51B Fifth guide portions 52A, 52B, 53A, 53B, 54A, 54B, 55A, 55B Wall portions 56A, 56B First Guide surfaces 57A, 57B Second guide surface 62 Notch LA Projection length of inner teeth from yoke LB Projection length of outer teeth from yoke W Yoke width of

Claims (5)

a stator core (26) comprising a plurality of inner teeth (32) and outer teeth (33) protruding from the inner and outer circumferences of an annular yoke (31);
A yoke corresponding portion (40) arranged in a portion corresponding to the yoke (31), a plurality of inner teeth corresponding portions (41A, 41B, 41C, 41D, 41E) arranged in portions corresponding to the inner teeth (32). , 41F) and a plurality of outer teeth corresponding portions (42A, 42B, 42C, 42D, 42E, 42F) arranged in portions corresponding to the outer teeth (33), and extend in the axial direction of the stator core (26). an insulating member (27) covering the edges along;
The yoke (31) and the yoke-corresponding portion (40) between the inner teeth corresponding portions (41A to 41F) and between the outer teeth corresponding portions (42A to 42F) are sequentially wound in the circumferential direction by toroidal winding. A plurality of first-phase crossover wires connecting the first-phase coil portion (28a), the second-phase coil portion (29a), the third-phase coil portion (30a), and the first-phase coil portion (28a). (28b), a plurality of second phase transition wires (29b) connecting between the second phase coil portions (29a), and a plurality of third phase transition wires (30b) connecting between the plurality of third phase coil portions (30a) ) respectively and connected in a wye-connection scheme with a first phase winding (28), a second phase winding (29) and a third phase winding (30):
In a toroidal wound motor comprising
The first phase winding (28), the second phase winding (29) and the third phase winding (30) are made of parallel winding wire,
Projecting lengths (LA, LB) of the inner teeth (32) and the outer teeth (33) from the yoke (31) are set larger than the width (W) of the yoke (31),
The inner teeth corresponding portions (41A to 41F) are protruded outwardly from the yoke corresponding portions (40) in the direction along the axis and have protruding ends at the outer ends along the radial direction of the stator core (26). The outer teeth corresponding portions (42A to 42F) are provided with inner protruding portions (45) which protrude further outward than the yoke corresponding portions (40) in the direction along the axis, and the stator core (26) an outer ridge (46) having a protruding end at its radially outer end ,
The first phase crossover wire (28b) extending from the first phase coil portion (28a) extends inside the second phase coil portion (29a) and the third phase coil portion (30a) in the direction along the axis. A first guide portion (47A, 47B) is formed in the yoke corresponding portion (40) to guide the
A second guide part ( 48A, 48B) are formed in the yoke corresponding portion (40), and the inner raised portion (45) and the outer side are arranged between the third phase coil portion (30a) and the first phase coil portion (28a). A third guide portion that guides the second phase transition wire (29b) from the second guide portions (48A, 48B) to one of the raised portions (46) toward the projecting end portion of the one raised portion (46). (49A, 49B) are inclined so as to approach the outer end surfaces of the inner teeth corresponding portions (41C, 41F) or the outer teeth corresponding portions (42C, 42F) in the direction along the axis as they approach the protruding ends. along the axis line of one of the protruding ends of the inner protruding portion (45) and the outer protruding portion (46) arranged on both sides of the first phase coil portion (28a). The second phase connecting wire (29b) is guided from the third guide portions (49A, 49B) so as to straddle the first phase coil portion (28a) from the outside in the direction along the axial line on the outer end face in the direction of the 4 guide parts (50A, 50B) are formed,
The third-phase connecting wire (30b) extending from the third-phase coil portion (30a) extends from the outside of the first-phase coil portion (28a) and the second-phase coil portion (29a) in the direction along the axis. Between the third phase coil portion (30a) and the first phase coil portion (28a), the first phase coil portion (28a) and the second phase any of the inner raised portion (45) and the outer raised portion (46) arranged between the coil portions (29a) and between the second phase coil portion (29a) and the third phase coil portion (30a), respectively a toroidal-wound electric motor, wherein the protruding end is formed on the outer end face in the direction along the axis of the other protruding end. The first guide portions (47A, 47B) and the second guide portions (48A, 48B) are composed of the yoke corresponding portion (40), the first phase connecting wire (28b) made of parallel winding material, and the second phase connecting wire (28b). Wall portions (52A, 5B; 53A, 53B; 54A, 54A, 54A, 52A, 5B; 53A, 53B; 2. The toroidal winding motor according to claim 1, wherein the yoke corresponding portion (40) is arranged radially inwardly and outwardly of the yoke corresponding portion (40). The walls (52A, 5B; 53A, 53B; 54A, 54B; 56A, 55B) are formed integrally with at least one of the inner protrusion (45) and the outer protrusion (46). 3. A toroidal wound electric motor according to claim 2. A first phase transition wire (28b) extending from the first phase coil portion (28a) is guided toward the first guide portions (47A, 47B) so as to be oblique to the radial direction of the stator core (26). The first guide surfaces (56A, 56B) extending so as to intersect are arranged between the first phase coil portion (28a) and the second phase coil portion (29a), the inner protruding portion (45) and the outer protruding portion ( 46), and the second phase crossover wire (29b) extending from the second phase coil portion (29a) is guided toward the second guide portions (48A, 48B). Second guide surfaces (57A, 57B) extending so as to obliquely intersect with the radial direction of the stator core (26) form the inner side between the second phase coil portion (29a) and the third phase coil portion (30a). The toroidal wound electric motor according to any one of claims 1 to 3, characterized in that it is formed on either one of the raised portion (45) and the outer raised portion (46). The stator core (26) is shrink-fitted to the cylindrical cooling sleeve (14), and the projecting ends of the outer teeth corresponding portions (42B, 42E) selected from the plurality of outer teeth corresponding portions (42A to 42F) A U-shaped notch portion (62) is formed in the portion, and the first phase transition wire (28b), the second phase transition wire (29b) and the third phase transition wire (30b) are connected to the notch. The toroidal wound electric motor according to any one of claims 1 to 4, characterized in that it is arranged in a position to avoid overlapping with the portion (62).

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