JP6969034B2 - Rotating machine and stator for rotating machine - Google Patents

Description

Cross-reference of related applications

This application is based on Patent Application No. 2019-172400 filed in Japan on September 23, 2019, and the content of the basic application is incorporated by reference in its entirety.

The description of the present specification relates to a rotary electric machine that can be used as a generator or starter for a two-wheeled vehicle, and a stator thereof.

It is disclosed in Patent Document 1 and Patent Document 2 that a three-phase brushless motor is used as a rotary electric machine that can be used as a generator or a starter for a two-wheeled vehicle.

Japanese Unexamined Patent Publication No. 2002-291183 International Publication No. 2019/156136 Pamphlet

The rotary electric machine described in Patent Document 1 discloses a technique in which a stator core is divided into two and a coil is wound around each of the divided stator cores. In the two-divided stator core described in Patent Document 1, no gap is formed between the annular portion and the teeth portion. Further, in the two-divided stator core described in Patent Document 1, a coil is wound around the teeth portion. However, the number of turns of the coil and the shape of the winding were the same in any of the stator cores divided into two.

The rotary electric machine described in Patent Document 2 discloses a technique in which a stator core is divided into three and a coil is wound around each of the three divided stator cores. The three-divided stator core described in Patent Document 2 forms a gap that mechanically provides a loose bond between the annular portion and the tooth portion. Further, in the three-divided stator core described in Patent Document 2, a coil is wound around the teeth portion. However, as in Patent Document 1, the number of coil turns was the same for all the stator cores divided into three parts. The number of turns of the coil and the shape of the winding were the same for each of the three-divided stator cores.

As described above, neither the disclosure of Patent Document 1 nor the disclosure of Patent Document 2 formed a gap in the stator core between the annular portion and the teeth portion to cut off the magnetic circuit. Moreover, in both the disclosure of Patent Document 1 and the disclosure of Patent Document 2, coils having the same number of turns are wound around each of the divided stator cores. The shape of the stator core with the coil wound was the same for each of the divided stator cores.

Further improvements are required for rotary electric machines and stators for rotary electric machines in the above-mentioned viewpoints or in other viewpoints not mentioned.

The disclosure of this case provides a rotary electric machine and a stator for a rotary electric machine having an improved space factor of the coil.
The disclosure of this case additionally or alternately provides a rotary electric machine and a stator for a rotary electric machine in which magnetic noise is suppressed.

The first disclosure is a rotary electric machine. The rotary electric machine includes a stator and a rotor. The stator includes a stator core made of a magnetic steel material and a coil wound around a tooth portion of the stator core. The rotor has magnets arranged opposite to the coil and is rotatably arranged around the stator.

The stator core is divided into a first stator core and a second stator core. The number of turns and the shape of the winding are different between the first coil wound around the first stator core and the second coil wound around the second stator core.

The first stator core and the second stator core are each formed by laminating a plurality of stator core layer materials.

The stator core is made of a stator core layer material substrate in which an annular portion and a teeth portion extending radially outward from the annular portion are integrally formed, and a teeth layer material laminated on the teeth portion of the stator core layer material substrate. It constitutes a stator core layer material. The coil is wound around the teeth portion of the stator core layer material substrate and the outside of the teeth layer material.

The stator core is a state in which the first stator core and the second stator core are combined. A gap is formed between the annular portion of the stator core layer material substrate of the first stator core and the teeth layer material of the second stator core. A gap is formed between the annular portion of the stator core layer material substrate of the second stator core and the teeth layer material of the first stator core. That is, between the annular portion of the stator core layer material substrate of the first stator core and the teeth layer material of the second stator core, and between the annular portion of the stator core layer material substrate of the second stator core and the teeth layer material of the first stator core. A gap is formed in each.

In the first disclosure, the coil is wound outside the teeth portion of the stator core layer material substrate and the teeth layer material, and the winding of the first coil wound around the first stator core has the same number of stages over the entire radial direction. The winding of the second coil wound around the second stator core has a larger number of steps on the outer side in the radial direction than the number of windings on the inner side in the radial direction, and the space factor in a state where the first stator core and the second stator core are combined. Is increasing.

According to the first disclosure, a gap is formed between the stator core layer material substrate and the teeth layer material. As a result, it is possible to suppress the generation of magnetic noise due to the difference in winding between the first stator core and the second stator core.

In the second disclosure, the number of turns of the second coil wound around the second stator core is larger than the number of turns of the first coil wound around the first stator core.

The first disclosure increases the space factor in the state where the first stator core and the second stator core are combined. For this purpose, the first coil wound around the first stator core is formed in a cylindrical shape, and the second coil wound around the second stator core is formed in a fan shape extending outward in the radial direction.

In the third disclosure, the coil is provided by an aluminum wire. The aluminum wire has a relatively large wire diameter, and it is difficult to form the first coil and the second coil into the same shape. Therefore, in order to increase the space factor in the state where the first stator core and the second stator core are combined, it is desirable to make the number of turns and the shape of the winding different.

In the fourth disclosure, the teeth portion of the stator core layer material substrate and the teeth layer material form a laminated caulking portion at the same portion. The stator core layer material substrate and the teeth layer material are caulked and fixed by the laminated caulking portion.

According to the fourth disclosure, not only between the teeth portions of the stator core layer material substrate and between the teeth layer materials, but also between the teeth portions and the teeth layer materials of the stator core layer material substrate are caulked and fixed. Therefore, the laminated caulking portion can be used for efficient caulking and fixing.

In the fifth disclosure, the annular portion of the stator core layer material substrate of the first stator core and the annular portion of the stator core layer material substrate of the second stator core form a laminated caulking portion at the same portion.

According to the fifth disclosure, the laminated caulking portion is caulked and fixed between the stator core layer material substrates of the first stator core and between the stator core layer material substrates of the second stator core. In addition, the first stator core and the second stator core are caulked and fixed even in the annular portion. Therefore, efficient fixing is possible.

In the sixth disclosure, the total number of layers of the stator core layer material substrate and the number of layers of the tooth layer material is the same in the first stator core and the second stator core. In addition, the number of layers of the stator core layer material substrate is the same for the first stator core and the second stator core.

In the sixth disclosure, the number of turns and the shape of the winding are different between the first coil and the second coil, whereas the first stator core and the second stator core have the same shape.

In the seventh disclosure, the number of layers of the stator core layer material substrate of the stator core layer material of the first stator core and the number of layers of the stator core layer material substrate of the stator core layer material of the second stator core are different.

Also in the seventh disclosure, the number of turns and the shape of the winding are different between the first coil and the second coil. In addition, the number of layers of the stator core layer material substrate of the first stator core and the number of layers of the stator core layer material substrate of the second stator core are different. As a result of the difference in the number of turns and the shape of the winding, an imbalance of magnetic flux between the first coil and the second coil occurs. On the other hand, the imbalance of the magnetic flux may be adjusted by the difference in the number of layers of the stator core layer material substrate between the first stator core and the second stator core.

In the eighth disclosure, the number of layers of the teeth layer material of the stator core layer material of the first stator core and the number of layers of the teeth layer material of the stator core layer material of the second stator core are different.

Also in the eighth disclosure, the number of turns and the shape of the winding are different between the first coil and the second coil. In addition, the number of layers of the teeth layer material of the first stator core and the number of layers of the teeth layer material of the second stator core are different. As a result of the difference in the number of turns and the shape of the winding, an imbalance of magnetic flux between the first coil and the second coil occurs. On the other hand, the imbalance of the magnetic flux may be adjusted by the difference in the number of layers of the tooth layer material between the first stator core and the second stator core.

In the ninth disclosure, the stator core is divided into a first stator core and a second stator core. The first stator core and the second stator core are each formed by laminating a plurality of stator core layer materials.

The first stator core and the second stator core are formed by laminating a stator core layer material. The stator core layer material includes a stator core layer material substrate in which an annular portion and a tooth portion extending radially outward from the annular portion are integrally formed. Additionally, the stator core layer material includes a teeth layer material laminated on the teeth portion of the stator core layer material substrate. The coil is wound in three phases of U phase, V phase, and W phase on the outside of the teeth portion of the stator core layer material substrate and the teeth layer material.

The first stator core and the second stator core are combined. In the combined state, the first coil of the first stator core has the U phase, the W phase, and the V phase arranged in order, and the second coil of the second stator core has the U phase, the V phase, and the W phase arranged in order. ing. Further , a gap is formed between the annular portion of the stator core layer material substrate of the first stator core and the teeth layer material of the second stator core. In addition, a gap is formed between the annular portion of the stator core layer material substrate of the second stator core and the teeth layer material of the first stator core.

According to the ninth disclosure, a gap for blocking the magnetic circuit is formed between the stator core layer material substrate and the teeth layer material. As a result, it is possible to suppress the generation of magnetic noise caused by the first coil and the second coil.

In the tenth disclosure, the size of the gap is at least 0.3 mm. A high effect can be expected regarding the suppression of magnetic noise.

The eleventh disclosure of the present specification provides a stator for a rotary electric machine.

FIG. 1 is a front view of a rotary electric machine. FIG. 2 is a right side view of FIG. FIG. 3 is a front view of the stator. FIG. 4 is a front view of the first stator. FIG. 5 is a front view of the second stator. FIG. 6 is a front view of the stator core layer material substrate. FIG. 7 is a front view of the teeth layer material. FIG. 8 is a cross-sectional view of the teeth layer material. FIG. 9 is a front view showing a state in which the teeth layer material is combined with the teeth portion of the stator core layer material substrate. FIG. 10 is a perspective view showing a state in which the teeth layer material is combined with the teeth portion of the stator core layer material substrate. FIG. 11 is a cross-sectional view of the teeth portion. FIG. 12 is a cross-sectional view of a state in which the first stator core and the second stator core are combined. FIG. 13 is a front view showing a state in which the first stator core and the first stator core are combined. FIG. 14 is an explanatory diagram showing the relationship between the gap and the decrease in output voltage. FIG. 15 is an explanatory diagram showing the magnetic flux density. FIG. 16 is a cross-sectional view showing another embodiment of the first coil. FIG. 17 is a cross-sectional view showing another embodiment of the second coil. FIG. 18 is a cross-sectional view showing the relationship between the first coil and the second coil. FIG. 19 is a cross-sectional view of a modified example showing the relationship between the first coil and the second coil. FIG. 20 is a cross-sectional view of a modified example showing the relationship between the first coil and the second coil.

As shown in FIGS. 1 and 2, the rotary electric machine 10 includes a stator 100 fixed to a housing and a rotor 200 rotatably supported in the housing. The stator 100 includes a stator core 110 and a coil 120 around which an aluminum wire rod is wound. The coil 120 generates a magnetic force when a U-phase, V-phase, and W-phase three-phase alternating current is supplied.

The rotor 200 covers the radial outside of the coil 120, and the magnet 210 is arranged at a position facing the coil 120. In the magnet 210, S poles 211 and N poles 212 are alternately arranged. The rotor 200 rotates around the stator 100 when the magnetic force of the coil 120 and the magnet 210 attract and repel each other.

The rotary electric machine 10 may be used as a generator motor for a two-wheeled vehicle. In this case, the two-wheeled vehicle includes a battery (not shown) and an inverter circuit (not shown). When the rotary electric machine 10 functions as an electric motor, the DC power supplied from the battery is converted into three-phase alternating current by the inverter circuit and supplied to the coil 120. When the coil 120 is excited, the rotor 200 rotates, and the rotational force of the rotor 200 is used as an engine starter. When the engine is rotating, the rotary electric machine 10 functions as a generator. In this case, the rotor 200 is rotated by the output of the engine, and the coil 120 generates electricity by receiving the magnetic force of the magnet 210. The generated power is rectified by an inverter circuit and supplied to the load of the motorcycle including the battery.

The stator core 110 includes a ring-shaped annular portion 130 and a teeth portion 140 around which the coil 120 is wound. A sensor 300 is fixed to the annulus 130. The Hall IC is arranged inside the sensor 300, and detects a change in the magnetic force of the magnet 210 and outputs the rotation speed.

FIG. 3 is a front view of the stator 100 from which the rotor 200 and the sensor 300 are removed from FIG. The stator 100 is divided into a first stator core 101 shown in FIG. 4 and a second stator core 102 shown in FIG.

The first coil 121 of the first stator core 101 has the same number of turns from the inside to the outside in the radial direction, and is wound 27 times on each tooth portion 140. As shown in FIG. 4, the first coil 121 has a cylindrical shape of a square pillar. In this embodiment, the first coil 121 is wound in two stages.

The number of turns of the second coil 122 of the second stator core 102 is small on the inner side in the radial direction, and the number of turns is increased in two stages on the central portion and the outer side. Each tooth portion 140 is wound 35 times in total. As shown in FIG. 5, the shape is a tubular shape whose diameter expands toward the outside. In this embodiment, it is wound in two stages on the inner side in the radial direction, in three stages in the middle, and in four stages on the outer side in the radial direction.

In the state where the first stator core 101 and the second stator core 102 are combined, the first coil 121 and the second coil 122 are adjacent to each other as shown in FIG. By adjoining both coils 121 and 122 in a non-contact state, the space factor of the coil 120 is increased.

The first stator core 101 and the second stator core 102 are both formed by laminating a plurality of stator core layer material substrates 150 (shown in FIG. 6) and teeth layer material 160 (shown in FIG. 7). In this example, the stator core layer material 180 is composed of the stator core layer material substrate 150 and the teeth layer material 160.

In the stator core layer material substrate 150, the annular portion 130 and the teeth portion 140 are integrally formed. Then, a laminated caulking portion 151 is formed in each of the annulus portion 130 and the teeth portion 140.

The teeth layer material 160 is laminated on the teeth portion 140 of the stator core layer material substrate 150. The laminated caulking portion 161 is also formed on the tooth layer material 160. As shown in FIG. 8, the laminated caulking portion 161 is formed by press-molding a part of the tooth layer material 160 made of a magnetic steel plate, and the convex portion 163 on one surface and the concave portion 162 on the other surface have the same shape. In the state where the teeth layer material 160 is laminated, the convex portion 163 of one tooth layer material 160 is fitted into the concave portion 162 of the other tooth layer material 160. As a result, the adjacent teeth layer materials 160 are caulked and fixed.

The caulking fixing function of the laminated caulking portion 161 is the same between the laminated caulking portion 161 of the tooth layer material 160 and the laminated caulking portion 151 of the stator core layer material substrate 150. Further, between the laminated caulking portions 151 of the adjacent stator core layer material substrates 150, caulking is similarly performed by fitting one convex portion into the other concave portion.

As described above, the stator core layer material 180 is composed of the stator core layer material substrate 150 and the teeth layer material 160. In this embodiment, 18 pieces of the stator core layer material substrate 150 are combined, and 18 pieces of the tooth layer material 160 are also combined. That is, in this embodiment, the number of stator core layer members 180 is 36.

FIG. 9 is a front view showing a state in which the teeth layer material 160 is combined with the teeth portion 140 of the stator core layer material substrate 150. FIG. 10 is a perspective view showing a state in which the teeth layer material 160 is combined with the teeth portion 140 of the stator core layer material substrate 150.

As shown in FIG. 11, an insulator 125 made of an insulating resin is arranged on the tooth portion 140, and a coil 120 is wound around the insulator 125. As shown in the figure, the thickness of the teeth portion 140 (for 36 sheets) of the first stator core 101 is double that of the thickness of the annular portion 130 (for 18 sheets). Although FIG. 11 shows the first stator core 101 wound with the first coil 121, the same applies to the second stator core 102.

FIG. 11 shows only the first stator core 101. FIG. 12 shows a state in which the stator core layer material substrate 150 of the first stator core 101 and the stator core layer material substrate 150 of the second stator core 102 are combined. In the cross section of FIG. 12, both the annular portion 130 and the teeth portion 140 appear in the first stator core 101, and only the annular portion 130 appears in the second stator core 102.

As shown in FIG. 12, the first stator core 101 and the second stator core 102 are caulked and fixed in the same manner as any of the stator core layer material substrates 150. That is, the stator core layer material substrate 150 of the first stator core 101 and the stator core layer material substrate 150 of the second stator core 102 are caulked and fixed in the same manner as the caulking fixing between the stator core layer material substrates 150 of the first stator core 101.

Then, as shown in FIG. 12, a gap 170 is formed between the annular portion 130 of the second stator core 102 and the teeth portion 140 of the first stator core 101.

The second stator core 102 of FIG. 12 is shown only in the annular portion 130. As shown in FIG. 13, the first stator core 101 and the second stator core 102 are arranged so that the annular portions 130 are all in contact with each other and the teeth portions 140 are alternately present. Therefore, in FIG. 13, the gap 170 between the teeth layer material 160 and the stator core layer material substrate 150 can be seen in every other teeth portion 140.

There is a gap 170 between the stator core layer material substrate 150 of either the first stator core 101 and the second stator core 102 and the tooth layer material 160 of the other. The gap 170 cuts off the magnetic circuit of the first stator core 101 and the magnetic circuit of the second stator core 102.

Breaking off magnetic circuits is generally considered undesirable. In FIG. 14, the vertical axis indicates the output voltage (Vout), and the horizontal axis indicates the depth of the gap 170 (DP170). As shown in FIG. 14, the output voltage drops due to the gap 170. The output voltage drops sharply up to 0.2 mm in the gap 170, and after that, the degree of the drop becomes gentle even if the gap 170 is widened. It is judged that the magnetic circuit is interrupted with a gap of about 0.2 mm. Therefore, it is desirable that the size of the gap 170 is at least 0.3 mm. In this embodiment, the gap 170 is set to 0.5 mm, and the magnetic circuit can be cut off.

FIG. 15 shows the magnetic flux density, and it can be confirmed that the magnetic flux is blocked by the gap 170. Note that FIG. 15 shows a cross section different from that of FIG. 12, and a gap 170 between the annulus portion 130 and the teeth portion 140 is formed in the first stator core 101.

Although the gap is also used in Patent Document 2, the gap in Patent Document 2 mechanically causes a loose gap coupling, and does not cut off the magnetic circuit as in this example. Moreover, the stator core of Patent Document 2 is divided into three parts. Each of the divided stator cores is a stator core having a U-phase only coil, a stator core having a V-phase only coil, and a stator core having a W-phase only coil. Generally, in a three-phase brushless motor, vibration due to a three-phase phase shift becomes a problem. From this point of view, in Patent Document 2, since each stator core is divided into three phases as described above, the gap acts in a direction that promotes vibration even if the coupling is loose, which is not desirable.

On the other hand, in the first coil 121 of the first stator core 101 of this embodiment, the U phase, the W phase, and the V phase are arranged in order (FIG. 4). Similarly, in the second coil 122 of the second stator core 102 of this embodiment, the U phase, the V phase, and the W phase are arranged in order (FIG. 5). Therefore, even if the gap 170 is formed, the vibration due to the deviation of the three phases is significantly reduced as compared with Patent Document 2.

On the other hand, Patent Document 1 discloses a two-divided stator core, but in Patent Document 1, there is no gap between the annular portion of the stator core and the teeth. Therefore, if one stator core and the other stator core differ within tolerances, the force of the teeth of one stator core will be non-uniformly transmitted to the other stator core. As a result, the balance in both stator cores was lost, causing noise.

On the other hand, in this embodiment, a gap 170 is formed between the first stator core 101 and the second stator core 102. As a result, the deviation within the tolerance range can be absorbed by the gap 170.

In the first place, it was considered that the gap leads to a decrease in output and is not desirable (FIG. 14), so that it is not necessary to bother to form a gap in the two-divided stator core of Patent Document 1. Even if the gap of Patent Document 2 is applied to Patent Document 1, since the gap of Patent Document 2 is mechanically loosely coupled, it is not possible to absorb the deviation within the tolerance range as in the gap 170 of this example. Can not.

In addition, both Patent Document 1 and Patent Document 2 have the same number of turns and shapes of the coils wound around the divided stator cores. In this embodiment, as described above, the first coil 121 of the first stator core 101 and the second coil 122 of the second stator core 102 have different windings, and the number of turns and the shape are different. In this embodiment, the space factor of the coil is increased by making the number of turns and the winding shape different.

On the other hand, the winding shape is different between the first coil 121 and the second coil 122. As a result, the magnitude of the magnetic force differs between the magnetic circuit of the first stator core 101 and the magnetic circuit of the second stator core 102. It is not desirable that the magnetic force of the magnetic circuit is different because it causes magnetic noise due to magnetic vibration.

On the other hand, in this embodiment, since the gap 170 is formed between the first stator core 101 and the second stator core 102, the magnetic circuit can be cut off. Therefore, it is possible to suppress the generation of magnetic noise.

Although the above example is a desirable example, it can be variously changed within the scope of the claims. For example, in the above example, the number of stator core layer members 180 is 36, but the number can be increased or decreased.

The first stator core 101 and the second stator core 102 have the same shape. The first coil 121 and the second coil 122 are different in terms of the number of turns or the winding shape. However, the stator core 110 of the first stator core 101 and the stator core 110 of the second stator core 102 may be made different in accordance with the difference between the first coil 121 and the second coil 122.

For example, the number of the stator core layer material substrate 150 and the number of teeth layer materials 160 may be different. While the total number of the stator core layer materials 180 is the same for the first stator core 101 and the second stator core 102, the number of the stator core layer material substrates 150 of the stator core 110 having the larger number of turns of the coil 120 is the same as the number of turns of the coil 120. The number of stator cores 110 may be larger than the number of stator core layer material substrates 150, or conversely, the number may be smaller.

FIG. 16 shows the first coil 121 as an example in which 42 pieces of the stator core layer material 180 are used. The magnetic poles provided by the first coil 121 and the teeth 140 are also referred to as first magnetic poles. The number of teeth layer materials 160 and the number of stator core layer material substrates 150 are both 42. The number of the stator core layer material substrates 150 in the annular portion 130 is different between the first stator core 101 and the second stator core 102. The number of first stator cores 101 is 24. The number of the second stator cores 102 is 18. The thickness of the teeth portion 140 in the axial direction corresponds to 42 sheets of the teeth layer material 160. The gap 170 extends to an axial depth corresponding to 18 tooth layer members 160.

On the other hand, FIG. 17 shows the second coil 122 used together with the first coil 121 of FIG. The magnetic poles provided by the second coil 122 and the teeth 140 are also referred to as second magnetic poles. The first magnetic pole and the second magnetic pole are arranged alternately. The number of annular portions 130 of the stator core layer material substrate 150 in the first stator core 101 is 24. In the annulus 130, the number of sheets at the first magnetic pole and the number of sheets at the second magnetic pole are the same. The number of annular portions 130 of the stator core layer material substrate 150 in the second stator core 102 is 18. In the annulus 130, the number of sheets at the first magnetic pole and the number of sheets at the second magnetic pole are the same. However, the number of teeth layer members 160 in the first stator core 101 is 18. The number of stator core layer material substrates 150 in the second stator core 102 is 18. Therefore, the number of teeth layer materials 160 in the first stator core 101 and the number of teeth portions 140 of the stator core layer material substrate 150 in the second stator core 102 are the same. The axial thickness of the teeth portion 140 corresponds to 36 teeth layer members 160. The gap 170 extends to an axial depth corresponding to 18 tooth layer members 160. That is, in the portion where the first coil 121 is wound, the thickness of the tooth portion 140 is relatively thicker than the portion where the second coil 122 is wound. The ratio of the depth of the gap 170 in the first magnetic pole to the stator core is less than 50%. The ratio of the depth of the gap 170 in the second magnetic pole to the stator core is 50% or more. Therefore, in the portion where the first coil 121 is wound, the presence ratio of the gap 170 in the stator core layer material 180 is relatively smaller than the portion where the second coil 122 is wound.

As a result, the thickness of the teeth portion 140 of the second coil 122 having a large number of turns is smaller than that of the first coil 121 having a small number of turns. Moreover, the ratio of the gap 170 to the teeth portion 140 is also relatively larger than that of the teeth portion 140 of the first coil 121.

In FIGS. 16 and 17, the first coil 121 and the second coil 122 are described separately, but in FIG. 18, the first coil 121 and the second coil 122 are described at the same time. The width of the second coil 122 is larger than the width of the first coil 121 (the length in the vertical direction in FIG. 18) so as to increase the space factor.

In the example of FIG. 18, the stator is designed and formed as in the above embodiment. That is, in the second stator core 102, the number of stator core layer material substrates 150 is the same for the portion having the teeth portion 140 (the portion A in FIG. 18) and the portion not including the teeth portion 140 (the portion B in FIG. 18). be. Further, also in the first stator core 101, the number of the stator core layer material substrates 150 is the same in the portion provided with the teeth portion 140 (the portion C in FIG. 18) and the portion not provided with the teeth portion 140.

In the example of FIG. 19, the second stator core 102 has a stator designed and formed in the same manner as in the example of FIG. That is, in the second stator core 102, the number of the stator core layer material substrates 150 is the same in the portion including the teeth portion 140 (the portion A in FIG. 18) and the portion not including the teeth portion 140 (the portion B in FIG. 18). be. On the other hand, in the first stator core 101, the number of stator core layer material substrates 150 is designed and formed so that the portion provided with the teeth portion 140 (the portion C in FIG. 18) is larger than the portion not provided with the teeth portion 140. doing.

On the contrary, in the example of FIG. 20, in the first stator core 101, the number of the stator core layer material substrates 150 is the same in the portion having the teeth portion 140 (the portion C in FIG. 20) and the portion not including the teeth portion 140. It is designed and formed so as to be. In the second stator core 102, the number of the stator core layer material substrates 150 is larger in the portion provided with the teeth portion 140 (part A in FIG. 20) than in the portion not provided with the teeth portion 140 (part B in FIG. 20). It is designed and formed so as to be.

By adjusting the number of stator core layer material substrates 150 in this way, it is possible to adjust the imbalance in the amount of magnetic flux due to the difference in the number of turns and the winding shape between the first coil 121 and the second coil 122. ..

Further, in the above example, the wire rod made of aluminum is used for the coil 120, but a wire rod made of copper may be used instead of aluminum. It is effective when the coil 120 is made of aluminum wire to increase the space factor by making the first coil 121 and the second coil 122 different from each other, but it can also be adopted even if it is made of copper.

In the above example, the first coil 121 is wound in two stages, and the second coil 122 is wound in four stages in which the number of stages increases outward in the radial direction. However, the number of stages itself can be changed. If the number of winding stages of the second coil 122 is larger than the number of winding stages of the first coil 121, it can contribute to the improvement of the space factor.

In the above example, the stator core layer material substrate 150 and the tooth layer material 160 are caulked and fixed, but an adhesive may be used instead of caulking fixing or together with caulking fixing. Alternatively, it may be fixed by rivets.

Claims (11)

A stator core made of magnetic steel and having a ring-shaped annulus portion and a teeth portion extending radially from the annulus portion, and a stator having a coil wound around the teeth portion of the stator core.
A rotary electric machine having magnets arranged opposite to the coil and having a rotor rotatably arranged around the stator.
The stator core is divided into a first stator core and a second stator core.
The first stator core and the second stator core are each formed by laminating a plurality of stator core layer materials.
The stator core layer material is composed of a stator core layer material substrate in which the annulus portion and the teeth portion are integrally formed, and a teeth layer material laminated on the teeth portion of the stator core layer material substrate.
The coil is wound around the teeth portion of the stator core layer material substrate and the outside of the teeth layer material, and the winding of the first coil wound around the first stator core has the same number of stages over the entire radial direction. The winding of the second coil wound around the second stator core has a larger number of steps on the outer side in the radial direction than the number of windings on the inner side in the radial direction, and the first stator core and the second stator core are combined. We are increasing the product ratio,
In a state where the first stator core and the second stator core are combined, between the annular portion of the stator core layer material substrate of the first stator core and the teeth layer material of the second stator core, and the second stator core. The magnetic noise caused by the difference in winding between the first stator core and the second stator core, respectively, between the annular portion of the stator core layer material substrate and the teeth layer material of the first stator core. rotating electric machine gap Ru is formed to suppress the generation. The more the number of turns of the first first coil wound around the stator core, the rotary electric machine of the number of turns multi have claim 1, wherein the second coil is wound around the second stator core. The rotary electric machine according to claim 1 or 2, wherein the coil is an aluminum wire rod. A claim that a laminated caulking portion is formed at the same portion as the teeth portion of the stator core layer material substrate and the teeth layer material, and the stator core layer material substrate and the teeth layer material are caulked and fixed by the laminated caulking portion. Item 6. The rotary electric machine according to any one of Items 1 to 3. A laminated caulking portion is formed at the same portion as the annular portion of the stator core layer material substrate of the first stator core and the annular portion of the stator core layer material substrate of the second stator core, and the laminated caulking portion is used. The rotary electric machine according to any one of claims 1 to 4, wherein the annular portion of the stator core layer material substrate of the first stator core and the annular portion of the stator core layer material substrate of the second stator core are caulked and fixed. The sum of the number of layers of the stator core layer material of the stator core layer material of the first stator core and the number of layers of the teeth layer material, and the number of layers of the stator core layer material of the stator core layer material of the second stator core. The total number of layers of the teeth layer material is the same,
4. Rotating electric machine. The rotation according to any one of claims 1 to 5, wherein the number of layers of the stator core layer material substrate of the stator core layer material of the first stator core and the number of layers of the stator core layer material substrate of the stator core layer material of the second stator core are different. Electric. The rotary electric machine according to any one of claims 1 to 5, wherein the number of layers of the teeth layer material of the stator core layer material of the first stator core and the number of layers of the teeth layer material of the stator core layer material of the second stator core are different. A stator core made of magnetic steel and having a ring-shaped annulus portion and a teeth portion extending radially from the annulus portion, and a stator having a coil wound around the teeth portion of the stator core.
A rotary electric machine having magnets arranged opposite to the coil and having a rotor rotatably arranged around the stator.
The stator core is divided into a first stator core and a second stator core.
The first stator core and the second stator core are each formed by laminating a plurality of stator core layer materials.
The stator core layer material is composed of a stator core layer material substrate in which the annulus portion and the teeth portion are integrally formed, and a teeth layer material laminated on the teeth portion of the stator core layer material substrate.
The coil is wound in three phases of U phase, V phase, and W phase on the outside of the teeth portion of the stator core layer material substrate and the teeth layer material.
In a state where the first stator core and the second stator core are combined , the U phase, the W phase, and the V phase are sequentially arranged in the first coil of the first stator core, and the second coil of the second stator core is a second coil. The U phase, the V phase, and the W phase are arranged in order , and between the annular portion of the stator core layer material substrate of the first stator core and the teeth layer material of the second stator core, and the said of the second stator core. A rotary electric machine in which a gap for blocking a magnetic circuit is formed between the annular portion of the stator core layer material substrate and the teeth layer material of the first stator core. The rotary electric machine according to any one of claims 1 to 9, wherein the size of the gap is at least 0.3 mm. The first stator core made of magnetic steel and
The second stator core made of magnetic steel and
The first coil wound around the first stator core and
A second coil wound around the second stator core is provided.
The first stator core and the second stator core are each formed by laminating a plurality of stator core layer materials.
The stator core layer material is laminated on the stator core layer material substrate in which the annular portion and the teeth portion extending radially outward from the annular portion are integrally formed, and the teeth portion of the stator core layer material substrate. Composed of teeth layer material,
The first coil and the second coil are wound outside the teeth portion of the stator core layer material substrate and the teeth layer material, and the winding of the first coil wound around the first stator core is The number of steps is the same over the entire length in the radial direction, and the winding of the second coil wound around the second stator core has a larger number of steps on the outer side in the radial direction than the number of windings on the inner side in the radial direction. The space factor in combination with the stator core is increased, and the space factor is increased.
In a state where the first stator core and the second stator core are combined, between the annular portion of the stator core layer material substrate of the first stator core and the teeth layer material of the second stator core, and the second stator core. The magnetic noise caused by the difference in winding between the first stator core and the second stator core, respectively, between the annular portion of the stator core layer material substrate and the teeth layer material of the first stator core. rotating electrical machine stator for suppressing clearance Ru formed generation.

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