JP6900790B2 - Rotating machine - Google Patents

Description

The present specification discloses a technique relating to a rotary electric machine in which at least one laminated steel plate of a stator core and a mover core is skewed.

In the motor described in Patent Document 1, the stator core is skewed. The stator core is formed by laminating a first iron plate sheet of thin plates, and is provided with an insulating sheet that insulates between the winding and the stator core slot portion. Further, the stator core is provided with a second iron plate sheet thicker than the first iron plate sheet on the burr side of the stator core at the opening in the stacking direction of the stator core slot portion. The first iron plate sheet and the second iron plate sheet are mounted in a direction in which the burr directions coincide with each other. As a result, the invention described in Patent Document 1 attempts to prevent the insulating sheet from rubbing against the burrs of the stator core and damaging the insulating sheet at the opening in the stacking direction of the stator core slot portion.

Japanese Unexamined Patent Publication No. 2006-223065

However, in the electric motor described in Patent Document 1, the burr of the first iron plate sheet is in contact with the insulating sheet, and the insulating sheet, the insulating layer of the winding, and the winding may be damaged. In order to suppress these breakages, for example, it is necessary to make the insulating sheet thicker, the space factor of the windings in the stator core slot portion decreases, and the motor may become larger.

In view of such circumstances, the present specification discloses a rotary electric machine capable of reducing damage to the accommodating member due to the corners of the skewed laminated steel sheet.

The rotary electric machine disclosed in the present specification includes a stator and a mover, and a plurality of steel plates of at least one of the stator core and the mover iron core are skewed. The stator includes a stator core formed by laminating a plurality of thin plate-shaped steel plates and having a plurality of slots, and a stator winding inserted through the plurality of slots. The stator includes a mover iron core formed by laminating a plurality of thin plate-shaped steel plates and having a plurality of magnet accommodating portions, and a plurality of permanent magnets accommodating in the plurality of magnet accommodating portions. On the other hand, it is supported so that it can be moved. The moving direction of the mover with respect to the stator is the first direction, the opposite direction of the stator and the mover is the second direction, and the direction is orthogonal to both the first direction and the second direction. The direction to do is the third direction. The end face of the stator core forming each of the plurality of slots and the end face of the mover core forming each of the plurality of magnet accommodating portions are on the side of one of the first directions. The end face is the first end face, and the end face on the side in the other one direction of the first direction is the second end face. At this time, each of the plurality of the skewed steel sheets includes a first cut portion, a second cut portion, a first corner portion, and a second corner portion. The first cut portion forms a part of the first end surface and is sheared from one end side to the other end side in the third direction. The second cut portion forms a part of the second end surface and is sheared from the other end side in the third direction to the one end side. The first corner portion includes a portion where the end surface on one end side in the third direction and the first cutting portion intersect, and the end surface on the other end side in the third direction and the second cutting portion. It is formed at each intersecting part. The second corner portion includes a portion where the end surface on the other end side in the third direction intersects the first cutting portion, and the end surface on the one end side in the third direction and the second cutting portion. It is formed at each intersecting part. The first envelope connecting the first corners formed by the first cut and the second envelope connecting the first corners formed by the second cut. The inclination angles with respect to the three directions are the same as the inclination angles of the skew with respect to the third direction.

According to the above-mentioned rotary electric machine, the inclination angles of the first envelope and the second envelope with respect to the third direction are the same as the inclination angles of the skew with respect to the third direction. As a result, the accommodating member (for example, at least one of the stator winding and the plurality of permanent magnets) is skewed in contact with the first corner, which is smoother than the second corner. It is housed in a laminated steel plate (multiple steel plates). Therefore, the rotary electric machine can reduce damage to the accommodating member due to the corners of the skewed laminated steel plate (plurality of steel plates).

FIG. 5 is a cross-sectional view showing a part of a cross section of the rotary electric machine 10 cut in a plane perpendicular to the third direction (arrow Z direction) according to the first embodiment. FIG. 5 is a cross-sectional view showing an example of a cross section of the mover 30 cut in a plane perpendicular to the third direction (arrow Z direction). FIG. 5 is a cross-sectional view showing an example of a cross section in which the stator winding 24 and the insulator 25 inserted in the slot 23c after skewing are cut in a plane perpendicular to the second direction (arrow Y direction) according to the first embodiment. .. FIG. 5 is a cross-sectional view showing an example of a cross section in which the stator winding 24 and the insulator 25 inserted into the skewed slot 23c are cut in a plane perpendicular to the second direction (arrow Y direction) according to the reference form. FIG. 5 is a cross-sectional view showing an example of a cross section in which the stator winding 24 and the insulator 25 inserted in the slot 23c before skewing are cut in a plane perpendicular to the second direction (arrow Y direction) according to the reference form. According to the reference embodiment, the stator winding 24 and the insulator 25 inserted in the slot 23c when skewed in the direction opposite to the skew direction of the first embodiment are cut in a plane perpendicular to the second direction (arrow Y direction). It is sectional drawing which shows an example of the cross section. FIG. 5 is a cross-sectional view showing an example of a cross section in which the stator winding 24 and the insulator 25 inserted in the slot 23c before skewing are cut in a plane perpendicular to the second direction (arrow Y direction) according to the modified form. FIG. 5 is a cross-sectional view showing an example of a cross section in which the stator winding 24 and the insulator 25 inserted into the skewed slot 23c are cut in a plane perpendicular to the second direction (arrow Y direction) according to the second embodiment. .. FIG. 5 is a cross-sectional view showing an example of a cross section in which the stator winding 24 and the insulator 25 inserted in the slot 23c before skewing are cut in a plane perpendicular to the second direction (arrow Y direction) according to the modified form. FIG. 5 is a cross-sectional view showing an example of a cross section in which the stator winding 24 and the insulator 25 inserted into the skewed slot 23c are cut in a plane perpendicular to the second direction (arrow Y direction) according to the third embodiment. .. According to the reference embodiment, the stator winding 24 and the insulator 25 inserted in the slot 23c when skewed in the direction opposite to the skew direction of the third embodiment are cut in a plane perpendicular to the second direction (arrow Y direction). It is sectional drawing which shows an example of the cross section. FIG. 5 is a cross-sectional view showing an example of a cross section in which the stator winding 24 and the insulator 25 inserted in the slot 23c before skewing are cut in a plane perpendicular to the second direction (arrow Y direction) according to the modified form.

In this specification, embodiments are described with reference to the drawings. In the drawings, common reference numerals are given to common parts for each embodiment, and duplicate description is omitted in the present specification. Moreover, what is described in one embodiment can be applied to other embodiments as appropriate. Further, the drawings are conceptual drawings and do not specify the dimensions of the detailed structure.

<First Embodiment>
(Rough configuration of rotary electric machine 10)
As shown in FIG. 1, the rotary electric machine 10 includes a stator 20 and a mover 30. The stator 20 includes a stator core 21 and a stator winding 24. The stator core 21 has a plurality of (60 in this embodiment) slots 23c, and a stator winding 24 is inserted through the plurality of (60) slots 23c. An insulator 25 is provided between the end face 23c1 of the stator core 21 forming each of the plurality of (60) slots 23c and the stator winding 24.

As shown in FIG. 2, the mover 30 includes a mover iron core 31 and a plurality of permanent magnets 34 (two per magnetic pole, 16 in total in this embodiment) with respect to the stator 20. It is supported so that it can be moved. The mover iron core 31 has a plurality of magnet accommodating portions 33 (two per magnetic pole, 16 in total in this embodiment), and the plurality (16) magnet accommodating portions 33 have a plurality of (16) magnet accommodating portions 33. () Permanent magnets 34 are housed. As described above, the rotary electric machine 10 of the present embodiment is a rotary electric machine having an 8-pole 60-slot configuration (a rotary electric machine having a basic configuration in which the number of magnetic poles of the mover 30 is 2 and the number of slots of the stator 20 is 15 slots). is there. The number of magnetic poles of the mover 30 (the number of magnetic poles of the permanent magnet 34), the number of the permanent magnets 34 per magnetic pole, and the number of slots of the stator 20 (the number of slots 23c) are not limited.

Here, the moving direction of the mover 30 with respect to the stator 20 is the first direction (arrow X direction). Further, the direction in which the stator 20 and the mover 30 face each other is the second direction (arrow Y direction). Further, the direction from the stator 20 side to the mover 30 side in the second direction (arrow Y direction) is defined as the second direction mover side (arrow Y1 direction side). Further, the direction from the mover 30 side to the stator 20 side in the second direction (arrow Y direction) is defined as the second direction stator side (arrow Y2 direction side). Further, the direction orthogonal to both the first direction (arrow X direction) and the second direction (arrow Y direction) is defined as the third direction (arrow Z direction).

As shown in FIGS. 1 and 2, the rotary electric machine 10 of the present embodiment is a radial void type cylindrical rotary electric machine in which the stator 20 and the mover 30 are coaxially arranged. Therefore, the first direction (arrow X direction) corresponds to the circumferential direction of the rotary electric machine 10 and corresponds to the rotation direction of the mover 30 with respect to the stator 20. The second direction (arrow Y direction) corresponds to the radial direction of the rotary electric machine 10. Further, the third direction (arrow Z direction) corresponds to the axial direction of the rotary electric machine 10.

The stator core 21 is formed by laminating a plurality of thin plate-shaped steel plates 22 in the third direction (arrow Z direction). As the plurality of steel plates 22, for example, an electromagnetic steel plate such as a silicon steel plate can be used. As shown in FIG. 1, the stator core 21 includes a yoke portion 23a and a plurality of (60 in this embodiment) tooth portions 23b integrally formed with the yoke portion 23a.

The yoke portion 23a is formed along the first direction (arrow X direction). The plurality of (60) tooth portions 23b are formed so as to project from the yoke portion 23a toward the second direction mover side (arrow Y1 direction side). Further, slots 23c are formed by tooth portions 23b and 23b adjacent to the first direction (arrow X direction), and stator windings 24 are inserted into a plurality of (60) slots 23c. Further, each of the plurality (60 pieces) of the teeth portions 23b includes a teeth tip portion 23d. The tooth tip portion 23d refers to the tip portion of the tooth portion 23b on the second direction mover side (arrow Y1 direction side), and is formed wide in the first direction (arrow X direction).

In the stator winding 24, for example, the surface of a conductor such as copper is coated with an insulating layer such as enamel. The cross-sectional shape of the stator winding 24 is not particularly limited, and may be any cross-sectional shape. For example, windings having various cross-sectional shapes such as a round wire having a circular cross-section and a square wire having a polygonal cross-section can be used. It is also possible to use parallel thin wires in which a plurality of finer winding strands are combined. When the parallel thin wire is used, the eddy current loss generated in the stator winding 24 can be reduced as compared with the case of the single wire, and the efficiency of the rotary electric machine 10 is improved. Further, since the force required for winding molding can be reduced, the moldability is improved and the manufacturing becomes easy.

The winding method of the stator winding 24 is not limited. The stator winding 24 can be wound by, for example, concentric winding, corrugated winding, lap winding, or the like. Further, the winding method of the stator winding 24 is not limited to the distributed winding, and may be a centralized winding. Further, the rotary electric machine 10 of the present embodiment is, for example, a three-phase machine, and the stator winding 24 includes a plurality of (three) phase coils (not shown) having different phases. A plurality of (three) phase coils can be electrically connected by, for example, a Y connection. Further, a plurality of (three) phase coils can be electrically connected by a Δ connection. The rotary electric machine 10 is not limited to the three-phase machine, and may be a single-phase machine or a multi-phase machine other than the three-phase machine.

Further, as shown in FIG. 1, an insulator 25 is provided between the end face 23c1 of the stator core 21 forming each of the plurality of (60) slots 23c and the stator winding 24. The insulator 25 electrically insulates between the end face 23c1 of the stator core 21 forming each of the plurality of (60) slots 23c and the stator winding 24. As the insulator 25, for example, insulating paper or the like can be used.

The mover iron core 31 is formed by laminating a plurality of thin plate-shaped steel plates 32 in the third direction (arrow Z direction). As the plurality of steel plates 32, for example, an electromagnetic steel plate such as a silicon steel plate can be used. The rotary electric machine 10 of the present embodiment is a cylindrical rotary electric machine, and the movable iron core 31 is formed in a cylindrical shape. Further, as shown in FIG. 2, the movable iron core 31 is provided with a plurality of magnet accommodating portions 33 (two per magnetic pole, 16 in total).

A plurality of (2 per magnetic pole, 16 in total) permanent magnets 34 are embedded in the plurality of (16) magnet accommodating portions 33, and the plurality (16) permanent magnets 34 and the stator 20 are embedded. The mover 30 is movable (rotatable) by the generated rotating magnetic field. In FIG. 2, for convenience of illustration, the plurality (two) magnet accommodating portions 33 for one magnetic pole and the plurality (two) permanent magnets 34 are assigned code numbers corresponding to the portions described later. , The other magnet accommodating portion 33 and the permanent magnet 34 also have the same portions. Further, the number and arrangement of the plurality (16) magnet accommodating portions 33 and the plurality (16) permanent magnets 34 are not limited. For example, as shown in FIG. 2, the plurality of magnet accommodating portions 33 and the plurality of permanent magnets 34 can be arranged in a V shape in a third direction (arrow Z direction). Further, the plurality of magnet accommodating portions 33 and the plurality of permanent magnets 34 may be arranged along the first direction (arrow X direction). Further, the plurality of magnet accommodating portions 33 and the plurality of permanent magnets 34 may be arranged in combination thereof.

As the plurality of permanent magnets 34, for example, known ferrite magnets or rare earth magnets can be used. Further, the manufacturing method of the plurality of permanent magnets 34 is not limited. As the plurality of permanent magnets 34, for example, a resin bond magnet or a sintered magnet can be used. The resin-bonded magnet can be formed by, for example, mixing a ferrite-based raw material magnet powder and a resin, and casting the resin-bonded magnet into the movable core 31 by injection molding or the like. The sintered magnet can be formed, for example, by forming a rare earth-based raw material magnet powder under pressure in a magnetic field and baking it at a high temperature. The mover 30 can also have a surface magnet shape. In the surface magnet type mover 30, a plurality of permanent magnets 34 are provided on the surface (outer surface) of the mover core 31 facing each tooth tip portion 23d of the stator core 21.

In the present embodiment, the mover 30 is provided inside the stator 20 (on the axial side of the rotary electric machine 10), and is movably supported (rotatably) with respect to the stator 20. Specifically, as shown in FIG. 2, the movable core 31 is provided with a shaft 35, and the shaft 35 aligns the axis of the movable iron core 31 along the third direction (arrow Z direction). It penetrates. Both ends of the shaft 35 in the third direction (arrow Z direction) are rotatably supported by bearing members (not shown). As a result, the mover 30 is movable (rotatable) with respect to the stator 20.

(Skew)
In the rotary electric machine 10, at least one of the stator core 21 and the movable core 31 (in this embodiment, the stator core 21) is skewed on the laminated steel plates (plurality of steel plates 22). FIG. 3 shows an example of a cross section in which the stator winding 24 and the insulator 25 inserted into the skewed slot 23c are cut in a plane perpendicular to the second direction (arrow Y direction). In the figure, in order to show the cross-sectional state of the laminated steel plate in detail, for convenience of explanation, a laminated steel plate in which a plurality of (8 sheets) steel plates 22 are laminated in the third direction (arrow Z direction) is shown. In an actual rotary electric machine 10, the number of laminated steel plates 22 is often more than eight, and even in that case, the matters described in the present specification can be applied. Further, in the figure, for convenience of illustration, one steel plate 22 is given a code number corresponding to a portion described later, but the other steel plate 22 also has the same portion. The same can be said for the cross-sectional view described later.

As shown in FIG. 3, the stator core 21 includes a first reference portion 41 and a continuous skew portion 42. The first reference portion 41 refers to a portion that serves as a reference for skewing. The continuous skew portion 42 refers to a portion that is gradually shifted in the first direction (arrow X direction) with respect to the first reference portion 41 and is arranged in the third direction (arrow Z direction). In the present embodiment, the first reference portion 41 is provided on the steel plate 22 forming the end surface of the stator core 21 on one end side (arrow Z1 direction side) in the third direction (arrow Z direction). Further, in the continuous skew portion 42, the maximum value of the relative skew amount between the stator core 21 and the movable core 31 is set to one slot pitch (1sp) of a plurality of (60 in this embodiment) slots 23c. The maximum value of the skew amount with respect to the first reference portion 41 is set in 1.

As shown in the figure, for example, with respect to one steel plate 22 (first reference portion 41) forming the stator core 21, the remaining plurality (7 in the figure) forming the stator core 21. The steel plate 22 (continuous skew portion 42) is arranged (laminated) in the third direction (arrow Z direction) gradually shifted to the right of the paper surface. Further, in the present embodiment, the stator core 21 includes a first reference portion 41 and a continuous skew portion 42, and the stator core 31 does not include these. Therefore, the skew amount in the movable core 31 is 0, and the continuous skew portion 42 of the stator core 21 has a maximum value of the skew amount with respect to the first reference portion 41, which is one slot pitch of a plurality of (60) slots 23c. It is set to (1sp) minutes.

As a result, the steel plate 22 forming the end surface of the stator core 21 on the other end side (arrow Z2 direction side) in the third direction (arrow Z direction) has one slot in the right direction of the paper surface with respect to the first reference portion 41. They are arranged so as to be shifted by the pitch (1 sp). The rotary electric machine 10 of the present embodiment is a rotary electric machine having an 8-pole 60-slot configuration (a rotary electric machine having a basic configuration in which the number of magnetic poles of the mover 30 is 2 and the number of slots of the stator 20 is 15 slots). One slot pitch (1sp) corresponds to an electric angle of 24 ° (= 360 ° / 15 slots).

The reference position P0 shown in the figure indicates the reference position of the skew. The reference position P0 may be referred to any position in the first direction (arrow X direction). Further, the product thickness of the stator core 21 in the third direction (arrow Z direction) is defined as the product thickness L. Further, the thickness obtained by subtracting the plate thickness of one steel plate 22 from the product thickness L is defined as the thickness L1. The maximum value of the skew amount with respect to the first reference portion 41 in the continuous skew portion 42 of the stator core 21 is defined as the skew amount W. Further, the inclination angle of the skew with respect to the third direction (arrow Z direction), which ^{is represented by tan -1} (W / L1), is defined as the stator side inclination angle θa.

When the rotary electric machine 10 is a cylindrical rotary electric machine, the number of slots is the number of slots s, and the radius in the gap where the stator 20 and the mover 30 face each other is the radius r. Can be represented by. Further, in the rotary electric machine 10 (inner rotor type rotary electric machine) in which the mover 30 is provided inside the stator 20, the radius r may be the inner diameter of the stator 20. At this time, tan θa, which is the tangent of the stator side inclination angle θa, can be represented by the following equation 2. In the inner rotor type rotary electric machine, when skewing the mover iron core 31, the outer diameter of the mover 30 may be used as the radius r.
(Number 1)
W = 2 × π × r / s
(Number 2)
tanθa = W / L1 = 2 × π × r / s / L1

Generally, as the radius r increases, the number of slots s increases, so the number of slots s is proportional to the radius r. Therefore, the increase / decrease in the number of slots s and the increase / decrease in the radius r cancel each other out, and tanθa is proportional to 2 × π / L1. That is, the larger the thickness L1, the smaller the stator side inclination angle θa, and the smaller the thickness L1, the larger the stator side inclination angle θa.

According to the rotary electric machine 10 of the present embodiment, the stator core 21 includes a first reference portion 41 and a continuous skew portion 42. Further, the continuous skew portion 42 is a first reference portion so that the maximum value of the relative skew amount between the stator core 21 and the movable core 31 is one slot pitch (1sp) of a plurality of (60) slots 23c. The maximum value of the skew amount with respect to 41 (in this embodiment, one slot pitch (1 sp)) is set. As a result, the rotary electric machine 10 of the present embodiment can reduce the noise and vibration of the rotary electric machine 10. Further, the rotary electric machine 10 of the present embodiment can reduce torque ripple as well as reduce noise and vibration of the rotary electric machine 10.

Further, it is preferable that the inclination angle (in the present embodiment, the stator side inclination angle θa) with respect to the third direction (arrow Z direction) of the skew is set to be constant. As a result, the leakage flux in the third direction (arrow Z direction) can be mainly reduced as compared with the case where the inclination angle (stator side inclination angle θa) changes. In FIG. 3, the skew direction is set to the right direction of the paper surface (the other one direction (arrow X2 direction) of the first direction (arrow X direction)), but the left direction of the paper surface (first direction). It can also be set in one of (arrow X direction) (arrow X1 direction). Also in this case, it is preferable that the inclination angle (stator-side inclination angle θa) with respect to the third direction (arrow Z direction) of the skew is set to be constant.

(Relationship between skew and stator winding 24 and insulator 25)
As shown in FIG. 1, with respect to the end face 23c1 of the stator core 21 forming each of the plurality of (60) slots 23c, the side in one of the first directions (arrow X direction) (arrow X1 direction). Let the end surface be the first end surface 51a. Further, with respect to the end face 23c1 of the stator core 21 forming each of the plurality of (60) slots 23c, the end face on the side in the other one direction (arrow X2 direction) of the first direction (arrow X direction). The second end surface 52a. Further, as shown in FIG. 2, with respect to the end surface 33a of the movable iron core 31 forming each of the plurality of (16) magnet accommodating portions 33, one direction (arrow X1) of the first direction (arrow X direction). The end face on the side (direction) is defined as the first end face 51b. Further, with respect to the end surface 33a of the mover iron core 31 forming each of the plurality of (16) magnet accommodating portions 33, the side in the other one direction (arrow X2 direction) of the first direction (arrow X direction). The end face is the second end face 52b.

As shown in FIG. 4A, in the reference mode, both the first end surface 51a and the second end surface 52a of the stator core 210 forming each of the plurality (60) slots 23c are in the third direction (arrow Z direction). Is sheared from one end side (arrow Z1 direction side) to the other end side (arrow Z2 direction side). As a result, in the reference form, each of the plurality of steel plates 220 (8 in the figure) of the stator core 210 includes a cut portion 22x. The cut portion 22x forms a part of the first end surface 51a and the second end surface 52a of the stator core 210, and forms a part from one end side (arrow Z1 direction side) to the other end side (arrow Z2) in the third direction (arrow Z direction). The part that is sheared in the direction side).

Further, a corner portion 22y is formed at a portion where the end surface 22a on one end side (arrow Z1 direction side) in the third direction (arrow Z direction) and the cutting portion 22x intersect. A corner portion 22z is formed at a portion where the end surface 22b on the other end side (arrow Z2 direction side) of the third direction (arrow Z direction) and the cutting portion 22x intersect. In the reference embodiment, both the first end surface 51a and the second end surface 52a of the stator core 210 move from one end side (arrow Z1 direction side) to the other end side (arrow Z2 direction side) in the third direction (arrow Z direction). Since it is sheared, the corner portion 22z is sharper than the corner portion 22y. The corner portion 22y corresponds to a sagging portion in shearing. The corner portion 22z corresponds to the burr portion in the shearing process, but includes the case where the burr portion is deleted after the shearing process.

In the first end surface 51a, the stator winding 24 is inserted in a state where the corner portion 22y is in contact with the insulator 25. Since the corner portion 22y is smoother than the corner portion 22z, it is unlikely that the insulator 25 and the stator winding 24 will be damaged on the first end surface 51a. On the other hand, in the second end surface 52a, the stator winding 24 is inserted in a state where the corner portion 22z is in contact with the insulator 25. Since the corner portion 22z is sharper than the corner portion 22y and the contact surface pressure is high, there is a high possibility that the insulator 25 and the stator winding 24 will be damaged at the second end surface 52a.

As shown in FIG. 4A, when the stator winding 24 is inserted after skewing the stator core 210, the stator winding 24 is on one end side (arrow Z1 direction) in the third direction (arrow Z direction). It can be inserted from either the side) or the other end side (arrow Z2 direction side). However, it is necessary to pay attention to the damage to the insulator 25 and the stator winding 24 due to the corner portion 22z of the second end surface 52a described above.

As shown in FIG. 4B, when the stator winding 24 is inserted before skewing the stator core 210, the stator winding 24 is on one end side (arrow Z1 direction side) in the third direction (arrow Z direction). It is good to insert from. In this case, the corner portion 22y easily comes into contact with the insulator 25 on both the first end surface 51a and the second end surface 52a. This is particularly remarkable in the laminated steel sheet on one end side (arrow Z1 direction side) in the third direction (arrow Z direction). Therefore, damage to the insulator 25 and the stator winding 24 during the insertion work of the stator winding 24 can be suppressed. On the contrary, when the stator winding 24 is inserted from the other end side (arrow Z2 direction side) in the third direction (arrow Z direction), the corner portion 22z is the insulator 25 on both the first end surface 51a and the second end surface 52a. It becomes easier to come in contact with. This is particularly remarkable in the laminated steel sheet on the other end side (arrow Z2 direction side) in the third direction (arrow Z direction). Therefore, the insulator 25 and the stator winding 24 may be damaged in the insertion operation of the stator winding 24.

From the state shown in FIG. 4B, for example, with respect to one steel plate 220 (first reference portion 41) forming the stator core 210, the remaining plurality (7 in the same figure) forming the stator core 210. It is assumed that the steel plate 220 (continuous skew portion 42) of the above is gradually shifted to the right of the paper surface. In this case, a plurality of steel plates 220 (7 in the figure) forming the stator core 210 are skewed in a state where the corner portion 22z is in contact with the insulator 25 on both the first end surface 51a and the second end surface 52a. To. Since the corner portion 22z is sharper and has a higher contact surface pressure than the corner portion 22y, the insulator 25 and the stator winding 24 may be damaged on both the first end surface 51a and the second end surface 52a. is there. The same can be said for the case where a plurality of (7 sheets in the figure) steel plates 220 (continuous skewed portions 42) are gradually shifted to the left on the paper surface. As described above, in the reference embodiment, in either case of skewing the stator core 210 and then inserting the stator winding 24, or in the case of skewing the stator core 210 after inserting the stator winding 24. Also, the insulator 25 and the stator winding 24 may be damaged.

On the other hand, in the present embodiment, as shown in FIG. 3, each of the plurality of (8 sheets in the figure) steel plates 22 of the stator cores 21 that have been skewed has the first cut portion 22c and the second. It includes a cutting portion 22d, a first corner portion 22e, and a second corner portion 22f. Further, it is preferable that the first cutting portion 22c and the second cutting portion 22d are formed along the third direction (arrow Z direction), respectively. The first cut portion 22c forms a part of the first end surface 51a and is sheared from one end side (arrow Z1 direction side) to the other end side (arrow Z2 direction side) in the third direction (arrow Z direction). Refers to the part. The second cut portion 22d forms a part of the second end surface 52a and is sheared from the other end side (arrow Z2 direction side) in the third direction (arrow Z direction) to one end side (arrow Z1 direction side). Refers to the part.

The first corner portion 22e is a portion where the end surface 22a on one end side (arrow Z1 direction side) in the third direction (arrow Z direction) and the first cutting portion 22c intersect, and the third direction (arrow Z direction). It is formed at a portion where the end surface 22b on the other end side (the side in the direction of arrow Z2) and the second cutting portion 22d intersect. The second corner portion 22f is a portion where the end surface 22b on the other end side (arrow Z2 direction side) of the third direction (arrow Z direction) and the first cutting portion 22c intersect, and the third direction (arrow Z direction). Is formed at a portion where the end surface 22a on one end side (arrow Z1 direction side) and the second cutting portion 22d intersect. The first corner portion 22e corresponds to a sagging portion in shearing. The second corner portion 22f corresponds to the burr portion in the shearing process, but includes the case where the burr portion is deleted after the shearing process.

Further, as shown in FIG. 3, the inclination angles θev1 and θev2 of the first envelope ev1 and the second envelope ev2 with respect to the third direction (arrow Z direction) are the inclination angles of the skew with respect to the third direction (arrow Z direction). (In this embodiment, the angle of inclination on the stator side θa) is consistent with the above. The first envelope ev1 refers to an envelope connecting a plurality of (eight in the figure) first corner portions 22e formed by the first cut portion 22c. The second envelope ev2 refers to an envelope connecting a plurality of (eight in the figure) first corner portions 22e formed by the second cut portion 22d.

As shown in FIG. 5A, when skewing is performed in the direction opposite to the skew direction of the first embodiment (to the left of the paper surface), the second corner portion 22f is in contact with the insulator 25 on both the first end surface 51a and the second end surface 52a. In this state, the stator winding 24 is inserted. Since the second corner portion 22f is sharper and has a higher contact surface pressure than the first corner portion 22e, the insulator 25 and the stator winding 24 are damaged on both the first end surface 51a and the second end surface 52a. there's a possibility that.

On the other hand, in the present embodiment, as shown in FIG. 3, the inclination angles θev1 and θev2 with respect to the third direction (arrow Z direction) of the first envelope ev1 and the second envelope ev2 are the third direction of skew (arrow Z). All of them match the inclination angle (inclination angle θa on the stator side) with respect to the direction). As a result, the stator winding 24 is inserted in both the first end surface 51a and the second end surface 52a with the first corner portion 22e in contact with the insulator 25. Since the first corner portion 22e is smoother and has a lower contact surface pressure than the second corner portion 22f, the insulator 25 and the stator winding 24 are damaged on both the first end surface 51a and the second end surface 52a. Is suppressed.

Further, in the present embodiment, the first cutting portion 22c and the second cutting portion 22d are formed along the third direction (arrow Z direction), respectively. This facilitates the formation of the first cutting portion 22c and the second cutting portion 22d. For example, the stator core 21 is punched from one end side (arrow Z1 direction side) in the third direction (arrow Z direction) to form the first end surface 51a, and the stator core 21 is formed in the third direction (arrow Z). The second end surface 52a can be formed by punching from the other end side (arrow Z2 direction side) of the direction) by press processing or the like. The same can be said for the first end surface 51b and the second end surface 52b of the movable element core 31, which will be described later.

As shown in FIG. 3, when the stator winding 24 is inserted after skewing the stator core 21, the stator winding 24 is on one end side (arrow Z1 direction) in the third direction (arrow Z direction). It can be inserted from either the side) or the other end side (arrow Z2 direction side). However, the laminated steel plate in which a plurality of (8 sheets in the figure) steel plates 22 are laminated is one second on the second end surface 52a on one end side (arrow Z1 direction side) in the third direction (arrow Z direction). There is a corner portion 22f. Further, the laminated steel plate in which a plurality of (8 sheets in the figure) steel plates 22 are laminated is one first one on the first end surface 51a on the other end side (arrow Z2 direction side) in the third direction (arrow Z direction). There is a two-sided portion 22f. These two second corner portions 22f are separated from the insulator 25 and the stator winding 24, but in particular, one end side (arrow Z1 direction side) and the other end side (arrow Z1 direction side) in the third direction (arrow Z direction) and the other end side (arrow Z1 direction side). It is even better to pay attention to the damage to the insulator 25 and the stator winding 24 due to these two second corners 22f in the laminated steel plate (on the side in the direction of arrow Z2).

Further, as an example of the case where the stator winding 24 is inserted after skewing the stator core 21, for example, a case where a segment conductor such as a square wire is used can be mentioned. A segment conductor such as a square wire has a relatively large cross-sectional size (thick), and it is often difficult to deform the stator winding 24. In this case, since it becomes difficult to skew the stator core 21 after inserting the stator winding 24, it is preferable to insert the stator winding 24 after skewing the stator core 21.

As shown in FIG. 5B, when the stator winding 24 is inserted before skewing the stator core 21, the stator winding 24 is on one end side (arrow Z1 direction side) in the third direction (arrow Z direction). It can be inserted from either the other end side (arrow Z2 direction side). However, the laminated steel plate in which a plurality of (8 sheets in the figure) steel plates 22 are laminated is one second on the second end surface 52a on one end side (arrow Z1 direction side) in the third direction (arrow Z direction). There is a corner portion 22f. Further, the laminated steel plate in which a plurality of (8 sheets in the figure) steel plates 22 are laminated is one first one on the first end surface 51a on the other end side (arrow Z2 direction side) in the third direction (arrow Z direction). There is a two-sided portion 22f. When the stator winding 24 is inserted before skewing the stator core 21, these two second corners 22f are in close proximity to the insulator 25 and the stator winding 24, especially in the third direction ( In the laminated steel plate on one end side (arrow Z1 direction side) and the other end side (arrow Z2 direction side) in the arrow Z direction, be careful of damage to the insulator 25 and the stator winding 24 by these two second corners 22f. There is a need to.

From the state shown in FIG. 5B, for example, with respect to one steel plate 22 (first reference portion 41) forming the stator core 21, the remaining plurality (7 in the same figure) forming the stator core 21. It is assumed that the steel plate 22 (continuous skew portion 42) of the above is gradually shifted to the right of the paper surface. As described above, the laminated steel plate in which a plurality of (8 sheets in the figure) steel plates 22 are laminated is formed on the first end surface 51a on the other end side (arrow Z2 direction side) in the third direction (arrow Z direction). There is one second corner 22f. Therefore, when starting skewing of a plurality of (7 sheets in the figure) steel plates 22 (continuous skew portions 42), it is necessary to pay attention to damage to the insulator 25 and the stator winding 24 by the second corner portion 22f. is there. As the skew of the plurality of steel plates 22 (continuous skew portions 42) progresses, the second corner portion 22f is separated from the insulator 25 and the stator winding 24. Therefore, the possibility of damage to the insulator 25 and the stator winding 24 by the second corner portion 22f is reduced.

Further, as an example of the case where the stator core 21 is skewed after the stator winding 24 is inserted, for example, a case where a round wire is used can be mentioned. The round wire has a relatively small cross-sectional size (thin), and the stator winding 24 is often easily deformed. In this case, for example, using a known coil insertion machine (inserter jig), the stator windings 24 are inserted into a plurality of (60) slots 23c, and after the stator windings 24 are inserted, the stator core 21 can be skewed.

As described above, in both the case where the stator winding 24 is inserted after skewing the stator core 21 and the case where the stator core 21 is skewed after the stator winding 24 is inserted, the reference embodiment is used. In comparison with this, damage to the insulator 25 and the stator winding 24 is suppressed.

<Second embodiment>
In this embodiment, mainly, each of the plurality of skewed steel sheets 122 includes a third cut portion 22 g instead of the first cut portion 22c, and a fourth cut portion instead of the second cut portion 22d. It differs from the plurality of steel plates 22 of the first embodiment in that it includes 22 hours. In this embodiment, the points different from those in the first embodiment are mainly described.

As shown in FIG. 6A, each of the plurality of (8 sheets in the same figure) steel plates 122 of the stator core 121 that has been skewed has a third cut portion 22 g, a fourth cut portion 22 h, and a third triangle. A portion 22i and a fourth square portion 22j are provided. The third cut portion 22g is a portion that forms a part of the first end surface 51a and is sheared so as to be inclined at a predetermined inclination angle θ with respect to the third direction (arrow Z direction). The fourth cut portion 22h is a portion that forms a part of the second end surface 52a and is sheared so as to be inclined at a predetermined inclination angle θ with respect to the third direction (arrow Z direction).

In the present embodiment, both the third cutting portion 22g and the fourth cutting portion 22h are sheared from one end side (arrow Z1 direction side) in the third direction (arrow Z direction) to the other end side (arrow Z2 direction side). ing. Therefore, the third triangular portion 22i is a portion where the end surface 22a on one end side (arrow Z1 direction side) in the third direction (arrow Z direction) and the third cutting portion 22g intersect, and the third direction (arrow Z direction). Is formed at a portion where the end surface 22a on one end side (arrow Z1 direction side) and the fourth cutting portion 22h intersect. The fourth square portion 22j is a portion where the end surface 22b on the other end side (arrow Z2 direction side) of the third direction (arrow Z direction) and the third cutting portion 22g intersect, and the third direction (arrow Z direction). Is formed at a portion where the end surface 22b on the other end side (arrow Z2 direction side) and the fourth cutting portion 22h intersect. The third triangular portion 22i corresponds to a sagging portion in shearing. The fourth square portion 22j corresponds to the burr portion in the shearing process, but includes the case where the burr portion is deleted after the shearing process.

Further, as shown in FIG. 6A, the predetermined inclination angle θ of the third cutting portion 22g and the fourth cutting portion 22h is any of the inclination angle (stator side inclination angle θa) with respect to the third direction (arrow Z direction) of the skew. Is also in agreement. Therefore, the stator winding 24 is inserted in a state where the third cut portion 22 g is in contact with the insulator 25 on the first end surface 51a and the fourth cut portion 22h is in contact with the insulator 25 on the second end surface 52a. Has been done. As a result, damage to the insulator 25 and the stator winding 24 is suppressed on both the first end surface 51a and the second end surface 52a. In the present embodiment, the stator side inclination angle θa is ^{represented by tan -1} (W / L2). The thickness L2 corresponds to the plate thickness obtained by subtracting the thickness of one third triangular portion 22i from the product thickness L.

Further, as shown in FIG. 6A, when the stator winding 24 is inserted after skewing the stator core 121, the stator winding 24 is on one end side (arrow Z1 direction) in the third direction (arrow Z direction). It is better to insert from the side). However, the laminated steel plate in which a plurality of (8 sheets in the figure) steel plates 122 are laminated is one first one on the first end surface 51a on the other end side (arrow Z2 direction side) in the third direction (arrow Z direction). There is a square portion 22j. Further, the laminated steel plate in which a plurality of (8 sheets in the figure) steel plates 122 are laminated is one first end surface 52a on the other end side (arrow Z2 direction side) in the third direction (arrow Z direction). There is a square portion 22j. These two fourth square portions 22j are close to the insulator 25 and the stator winding 24, and in particular, in the laminated steel plate on the other end side (arrow Z2 direction side) in the third direction (arrow Z direction). It is necessary to pay attention to the damage of the insulator 25 and the stator winding 24 by these two fourth square portions 22j.

As shown in FIG. 6B, even when the stator winding 24 is inserted before skewing the stator core 121, the stator winding 24 may be inserted from one end side in the third direction (arrow Z direction). However, the fourth square portion 22j is present on the first end surface 51a. Therefore, it is necessary to pay attention to the damage of the insulator 25 and the stator winding 24 by the fourth square portion 22j.

From the state shown in FIG. 6B, for example, with respect to one steel plate 122 (first reference portion 41) forming the stator core 121, the remaining plurality (7 in the same figure) forming the stator core 121. It is assumed that the steel plate 122 (continuous skew portion 42) of the above is gradually shifted to the right of the paper surface. As described above, the fourth square portion 22j exists on the first end surface 51a. At the time of skewing, a plurality of (7 sheets in the figure) steel plates 122 (continuous skew portion 42) are moved while pushing the insulator 25 and the stator winding 24 by the square portion 22j. Therefore, it is necessary to pay attention to the damage of the insulator 25 and the stator winding 24 by the square portion 22j. In this way, when the stator winding 24 is inserted after skewing the stator core 21, the insulator 25 and the stator winding are compared with the case where the stator core 21 is skewed after the stator winding 24 is inserted. Damage to the wire 24 is suppressed.

<Third Embodiment>
In the present embodiment, the shearing direction of the fourth cutting portion 22h is different from the shearing direction of the fourth cutting portion 22h of the second embodiment. In this embodiment, the differences from the second embodiment are mainly described.

As shown in FIG. 7A, also in the present embodiment, each of the plurality of (8 sheets in the figure) steel plates 222 of the stator core 221 that has been skewed has a third cut portion 22 g and a fourth cut. A portion 22h, a third triangular portion 22i, and a fourth square portion 22j are provided. The third cut portion 22g is sheared from one end side (arrow Z1 direction side) in the third direction (arrow Z direction) to the other end side (arrow Z2 direction side). On the other hand, the fourth cutting portion 22h of the present embodiment is sheared from the other end side (arrow Z2 direction side) in the third direction (arrow Z direction) to one end side (arrow Z1 direction side).

As a result, the third triangular portion 22i is a portion where the end surface 22a on one end side (arrow Z1 direction side) in the third direction (arrow Z direction) and the third cutting portion 22g intersect, and the third direction (arrow Z direction). ) On the other end side (arrow Z2 direction side) end surface 22b and the fourth cut portion 22h are formed at the intersections, respectively. The fourth square portion 22j is a portion where the end surface 22b on the other end side (arrow Z2 direction side) of the third direction (arrow Z direction) and the third cutting portion 22g intersect, and the third direction (arrow Z direction). Is formed at a portion where the end surface 22a on one end side (arrow Z1 direction side) and the fourth cutting portion 22h intersect.

As shown in FIG. 7B, when skewing is performed in the direction opposite to the skew direction of the present embodiment (to the left of the paper surface), the fourth square portion 22j is in contact with the insulator 25 on both the first end surface 51a and the second end surface 52a. In this state, the stator winding 24 is inserted. Since the fourth square portion 22j is sharper than the third triangular portion 22i and has a high contact surface pressure, the insulator 25 and the stator winding 24 are damaged on both the first end surface 51a and the second end surface 52a. there is a possibility.

On the other hand, in the present embodiment, as shown in FIG. 7A, the predetermined inclination angle θ of the third cutting portion 22g and the fourth cutting portion 22h is an inclination angle (stator side inclination) with respect to the third direction (arrow Z direction) of the skew. Both of them match the angle θa). Therefore, the stator winding 24 is inserted in a state where the third cut portion 22 g is in contact with the insulator 25 on the first end surface 51a and the fourth cut portion 22h is in contact with the insulator 25 on the second end surface 52a. Has been done. As a result, damage to the insulator 25 and the stator winding 24 is suppressed on both the first end surface 51a and the second end surface 52a.

As shown in FIG. 7A, when the stator winding 24 is inserted after skewing the stator core 221, the stator winding 24 is on one end side (arrow Z1 direction) in the third direction (arrow Z direction). It can be inserted from either the side) or the other end side (arrow Z2 direction side). However, the laminated steel plate in which a plurality of (8 sheets in the figure) steel plates 222 are laminated is one fourth end surface 52a on one end side (arrow Z1 direction side) in the third direction (arrow Z direction). There is a corner 22j. Further, the laminated steel plate in which a plurality of (8 sheets in the figure) steel plates 222 are laminated is one first one on the first end surface 51a on the other end side (arrow Z2 direction side) in the third direction (arrow Z direction). There is a square portion 22j. These two fourth square portions 22j are in close proximity to the insulator 25 and the stator winding 24, and in particular, one end side (arrow Z1 direction side) and the other end side (arrow) in the third direction (arrow Z direction). In the laminated steel plate (on the Z2 direction side), it is necessary to pay attention to damage to the insulator 25 and the stator winding 24 due to these two fourth square portions 22j.

As shown in FIG. 7C, when the stator winding 24 is inserted before skewing the stator core 221, the fourth square portion 22j is present on both the first end surface 51a and the second end surface 52a. Therefore, care must be taken when inserting the stator winding 24 from either one end side (arrow Z1 direction side) or the other end side (arrow Z2 direction side) in the third direction (arrow Z direction). Is.

From the state shown in FIG. 7C, for example, with respect to one steel plate 222 (first reference portion 41) forming the stator core 221, the remaining plurality (7 in the same figure) forming the stator core 221. It is assumed that the steel plate 222 (continuous skew portion 42) of the above is gradually shifted to the right of the paper surface. As described above, the fourth square portion 22j exists on the first end surface 51a. At the time of skewing, a plurality of (7 sheets in the figure) steel plates 222 (continuous skew portion 42) are moved while pushing the insulator 25 and the stator winding 24 by the square portion 22j. Further, a fourth square portion 22j is present on the second end surface 52a. At the time of skewing, the insulator 25 and the stator winding 24 are received by the square portion 22j. That is, on the first end surface 51a, the insulator 25 and the stator winding 24 are pushed by the fourth square portion 22j, and on the second end surface 52a, the insulator 25 and the stator winding 24 are pushed by the fourth square portion 22j. Receive. Therefore, it is necessary to pay attention to damage to the insulator 25 and the stator winding 24 by the fourth square portion 22j on both the first end surface 51a and the second end surface 52a. In this way, when the stator winding 24 is inserted after skewing the stator core 221, the insulator 25 and the stator winding are compared with the case where the stator core 221 is skewed after the stator winding 24 is inserted. Damage to the wire 24 is suppressed.

<Transformation form>
In the above-described embodiment, the laminated steel plates (a plurality of steel plates 22, 122, 222) of the stator cores 21, 121,221 are skewed. However, it is also possible to skew the laminated steel plate (plural number of steel plates 32) of the movable core 31. In this case, the movable iron core 31 includes a first reference portion 41 and a continuous skew portion 42. Further, in the above-described embodiment, the end surface 23c1 (first end surface 51a and second end surface 52a) of the stator core 21 is read as the end surface 33a (first end surface 51b and second end surface 52b) of the mover core 31. Further, the inclination angle of the skew with respect to the third direction (arrow Z direction) is the inclination angle on the mover side. Regarding the inclination angle on the mover side, the stator core 21 is read as the mover iron core 31 in the description of the inclination angle θa on the stator side.

In order to make the energization advance angle and the like common, the relative skews (both the maximum value of the skew amount and the skew direction) of the stator 20 and the mover 30 may be made equivalent. Therefore, for example, when only the mover 30 is skewed, the skew direction may be opposite to the skew direction when only the stator 20 is skewed in the same direction in the second direction (arrow Y direction). good. For example, when the skew direction when skewing only the stator 20 is the other one of the first directions (arrow X direction) (arrow X2 direction), when skewing is applied only to the mover 30. The skew direction may be set in one of the first directions (arrow X direction) (arrow X1 direction).

When a plurality of permanent magnets 34 are damaged and short-circuited with the mover iron core 31, a current path may be generated, especially in the case of a rare earth magnet. In this case, the efficiency of the rotary electric machine 10 decreases due to an increase in the eddy current loss of the movable core 31 and the plurality of permanent magnets 34, the magnetic flux decreases due to the temperature rise of the plurality of permanent magnets 34, and the torque per unit current due to the decrease in magnetic flux. There is a possibility that the material may deteriorate due to deterioration, oxidation of the plurality of permanent magnets 34, and the like. According to the above-described embodiment, damage to the plurality of permanent magnets 34 can be suppressed, and these concerns can be eliminated or alleviated.

Further, in both the stator core 21 and the mover iron core 31, the laminated steel plate (plurality of steel plates 22, 32) can be skewed. In this way, the rotary electric machine 10 can skew at least one of the stator core 21 and the mover iron core 31 (a plurality of steel plates 22, 32). However, in any of the above cases, in the continuous skew portion 42, the maximum value of the relative skew amount between the stator core 21 and the movable core 31 is set to one slot pitch (1sp) of the plurality (60) slots 23c. Therefore, the maximum value of the skew amount with respect to the first reference portion 41 is set.

As a result, the accommodating member (for example, at least one of the stator winding 24 and the plurality of permanent magnets 34) is skewed in contact with the first corner portion 22e, which is smoother than the second corner portion 22f. It is housed in a laminated steel plate (a plurality of steel plates 22, 32). Further, the accommodating member is a laminated steel sheet (skewed) in which the accommodating member is in contact with the third cut portion 22 g and the fourth cut portion 22h without being in contact with the sharper corner portion (fourth square portion 22j). It is housed in a plurality of steel plates 122, 222, 32). Therefore, for example, the insulator 25 can be thinned, and the winding amount of the stator winding 24 can be increased (the space factor can be improved). Further, for example, the amount of magnets of the plurality of permanent magnets 34 can be increased. Therefore, the performance of the rotary electric machine 10 can be improved and the size can be reduced.

Further, the second embodiment shown in FIG. 6A and the third embodiment shown in FIG. 7A are between the laminated steel plate (several steel plates 122, 222) and the insulator 25 with respect to the first embodiment shown in FIG. Since the gap can be reduced, the winding amount of the stator winding 24 can be further increased (the space factor can be improved). Further, when skewing the mover 30, for example, the amount of magnets of the plurality of permanent magnets 34 can be further increased.

The first reference portion 41 includes the first reference portion on one end side in the third direction (arrow Z1 direction side) provided on one end side (arrow Z1 direction side) in the third direction (arrow Z direction), and other than the third direction (arrow Z direction). It can also be divided into a first reference portion on the other end side in the third direction provided on the end side (side in the direction of arrow Z2). At this time, the continuous skew portion 42 can be divided into a continuous skew portion on one end side in the third direction and a continuous skew portion on the other end side in the third direction. As for the continuous skew portion on the one end side of the third direction, half of the one end side (arrow Z1 direction side) of the third direction (arrow Z direction) is from the first reference portion on the third direction one end side in the first direction (arrow X direction). A portion that is gradually shifted in one of the directions (arrow X1 direction) and is arranged up to the central portion in the third direction (arrow Z direction). As for the continuous skew portion on the other end side of the third direction, the other half portion of the other end side (arrow Z2 direction side) of the third direction (arrow Z direction) is the other of the first direction (arrow X direction) from the central portion. A portion that is gradually shifted in one direction (arrow X2 direction) and is arranged up to the first reference portion on the other end side in the third direction.

In addition, the inclination angle of the skew with respect to the third direction (arrow Z direction) is set to be constant at one half of the portion on one end side (arrow Z1 direction side) of the third direction (arrow Z direction), and the skew direction is the first direction. It is preferable that the setting is in one of the (arrow X directions) directions (arrow X1 direction). At this time, at the other half of the other end side (arrow Z2 direction side) of the third direction (arrow Z direction), the inclination angle of the skew with respect to the third direction (arrow Z direction) is set to be constant, and the skew direction is the first. It is preferable that the setting is made in the other one direction (arrow X2 direction) of one direction (arrow X direction). Further, it is preferable that the maximum value of the skew amount (skew amount W) in this case is set to the same value.

<Example of effect>
According to the rotary electric machine 10 according to the aspect 1, each of the plurality of skewed steel plates 22 and 32 has a first cut portion 22c, a second cut portion 22d, a first corner portion 22e, and a second. It is provided with a corner portion 22f. The first cut portion 22c forms a part of the first end surface 51a and is sheared from one end side (arrow Z1 direction side) to the other end side (arrow Z2 direction side) in the third direction (arrow Z direction). Refers to the part. The second cut portion 22d forms a part of the second end surface 52a and is sheared from the other end side (arrow Z2 direction side) in the third direction (arrow Z direction) to one end side (arrow Z1 direction side). Refers to the part. The first corner portion 22e is a portion where the end surface 22a on one end side (arrow Z1 direction side) in the third direction (arrow Z direction) and the first cutting portion 22c intersect, and the third direction (arrow Z direction). It is formed at a portion where the end surface 22b on the other end side (the side in the direction of arrow Z2) and the second cutting portion 22d intersect. The second corner portion 22f is a portion where the end surface 22b on the other end side (arrow Z2 direction side) of the third direction (arrow Z direction) and the first cutting portion 22c intersect, and the third direction (arrow Z direction). Is formed at a portion where the end surface 22a on one end side (arrow Z1 direction side) and the second cutting portion 22d intersect. Further, the inclination angles θev1 and θev2 of the first envelope ev1 and the second envelope ev2 with respect to the third direction (arrow Z direction) are the inclination angles (fixed element side inclination angle θa) with respect to the third direction (arrow Z direction) of the skew. , The tilt angle on the mover side). The first envelope ev1 refers to an envelope connecting a plurality of first corner portions 22e formed by the first cut portion 22c. The second envelope ev2 refers to an envelope connecting a plurality of first corner portions 22e formed by the second cutting portion 22d.

As a result, the accommodating member (for example, at least one of the stator winding 24 and the plurality of permanent magnets 34) is skewed in contact with the first corner portion 22e, which is smoother than the second corner portion 22f. It is housed in a laminated steel plate (a plurality of steel plates 22, 32). Therefore, the rotary electric machine 10 according to the aspect 1 can reduce damage to the accommodating member due to the corner portion (second corner portion 22f) of the skewed laminated steel plate (plurality of steel plates 22, 32).

According to the rotary electric machine 10 according to the aspect 2, in the rotary electric machine 10 according to the aspect 1, the first cutting portion 22c and the second cutting portion 22d are formed along the third direction (arrow Z direction), respectively. .. Therefore, the rotary electric machine 10 according to the aspect 2 facilitates the formation of the first cutting portion 22c and the second cutting portion 22d.

According to the rotary electric machine 10 according to the aspect 3, each of the plurality of skewed steel plates 122, 222, 32 includes a third cut portion 22 g and a fourth cut portion 22 h. The third cut portion 22g is a portion that forms a part of the first end surface 51a and is sheared so as to be inclined at a predetermined inclination angle θ with respect to the third direction (arrow Z direction). The fourth cut portion 22h is a portion that forms a part of the second end surface 52a and is sheared so as to be inclined at a predetermined inclination angle θ with respect to the third direction (arrow Z direction). The predetermined inclination angles θ of the third cutting portion 22g and the fourth cutting portion 22h coincide with the inclination angles (stator side inclination angle θa, mover side inclination angle) with respect to the third direction (arrow Z direction) of the skew. ing. The third cutting portion 22g is sheared from one end side (arrow Z1 direction side) in the third direction (arrow Z direction) to the other end side (arrow Z2 direction side), and the fourth cutting portion 22h is in the third direction. It is sheared from the other end side (arrow Z2 direction side) of (arrow Z direction) to one end side (arrow Z1 direction side).

As a result, the accommodating member (for example, at least one of the stator winding 24 and the plurality of permanent magnets 34) does not come into contact with the sharper corner portion (fourth square portion 22j), but the third cut portion 22g and the third cutting portion 22g. It is housed in a laminated steel plate (a plurality of steel plates 122, 222, 32) that has been skewed in a state of being in contact with the fourth cut portion 22h. Therefore, the rotary electric machine 10 according to the aspect 3 can reduce damage to the accommodating member due to the corners (fourth squares 22j) of the skewed laminated steel plates (plurality of steel plates 122, 222, 32). ..

<Others>
The embodiment is not limited to the embodiment described above and shown in the drawings, and can be appropriately modified and implemented within a range that does not deviate from the gist. For example, the rotary electric machine 10 is not limited to a rotary electric machine having a fractional slot configuration in which the number of slots for each pole and each phase is not an integer. The rotary electric machine 10 can also be applied to a rotary electric machine having an integer slot configuration in which the number of slots for each pole and each phase is an integer. Further, in the above-described embodiment, the mover 30 is provided inside the stator 20 (inner rotor type rotary electric machine). However, the mover 30 can also be provided outside the stator 20 (outer rotor type rotary electric machine). Further, the rotary electric machine 10 is not limited to the radial gap type or axial gap type rotary electric machine in which the stator 20 and the mover 30 are arranged coaxially. The rotary electric machine 10 can also be applied to a linear type in which the stator 20 and the mover 30 are arranged in a straight line, and the mover 30 moves in a straight line with respect to the stator 20. Further, the rotary electric machine 10 can be used, for example, in a vehicle driving motor, a generator, an industrial or household motor, a generator, and the like.

10: Rotating electric machine,
20: Stator, 21,121,221: Stator core,
22,122,222: Steel plate,
22c: first cutting part, 22d: second cutting part,
22e: first corner, 22f: second corner,
22g: 3rd cutting part, 22h: 4th cutting part,
23c: slot, 23c1: end face,
24: Stator winding,
30: Movable element, 31: Movable element iron core, 32: Steel plate,
33: Magnet housing, 33a: End face,
34: Permanent magnet,
51a, 51b: first end surface, 52a, 52b: second end surface,
ev1: 1st envelope, ev2: 2nd envelope,
θev1, θev2: tilt angle,
θ: Predetermined tilt angle,
Arrow X direction: First direction,
Arrow X1 direction: one direction, arrow X2 direction: other one direction,
Arrow Y direction: Second direction,
Arrow Z direction: Third direction.

Claims (3)

A stator core having a plurality of slots formed by laminating a plurality of thin plate-shaped steel plates and a stator having a stator winding inserted through the plurality of slots.
A mover iron core formed by laminating a plurality of thin plate-shaped steel plates and having a plurality of magnet accommodating portions and a plurality of permanent magnets accommodated in the plurality of magnet accommodating portions are provided and can be moved with respect to the stator. With the supported movers
A rotary electric machine in which at least one of the stator core and the movable core is skewered.
The moving direction of the mover with respect to the stator is the first direction, the opposite direction of the stator and the mover is the second direction, and the direction is orthogonal to both the first direction and the second direction. The direction to do is the third direction
The end face of the stator core forming each of the plurality of slots and the end face of the mover core forming each of the plurality of magnet accommodating portions are on the side of one of the first directions. When the end face is the first end face and the end face on the side in the other one direction of the first direction is the second end face,
Each of the plurality of steel sheets to which the skew is applied is
A first cut portion that forms a part of the first end surface and is sheared from one end side to the other end side in the third direction.
A second cut portion that forms a part of the second end surface and is sheared from the other end side in the third direction to the one end side.
It is formed at a portion where the end face on one end side in the third direction intersects with the first cut portion, and at a portion where the end face on the other end side in the third direction intersects with the second cut portion, respectively. The first corner and
It is formed at a portion where the end face on the other end side in the third direction intersects with the first cut portion, and at a portion where the end face on the one end side in the third direction intersects with the second cut portion, respectively. The second corner and
With
The first envelope connecting the first corners formed by the first cut and the second envelope connecting the first corners formed by the second cut. The tilt angle with respect to the three directions is the same as the tilt angle of the skew with respect to the third direction. The rotary electric machine according to claim 1, wherein the first cutting portion and the second cutting portion are each formed along the third direction. A stator core having a plurality of slots formed by laminating a plurality of thin plate-shaped steel plates and a stator having a stator winding inserted through the plurality of slots.
A mover iron core formed by laminating a plurality of thin plate-shaped steel plates and having a plurality of magnet accommodating portions and a plurality of permanent magnets accommodated in the plurality of magnet accommodating portions are provided and can be moved with respect to the stator. With the supported movers
A rotary electric machine in which at least one of the stator core and the movable core is skewered.
The moving direction of the mover with respect to the stator is the first direction, the opposite direction of the stator and the mover is the second direction, and the direction is orthogonal to both the first direction and the second direction. The direction to do is the third direction
The end face of the stator core forming each of the plurality of slots and the end face of the mover core forming each of the plurality of magnet accommodating portions are on the side of one of the first directions. When the end face is the first end face and the end face on the side in the other one direction of the first direction is the second end face,
Each of the plurality of steel sheets to which the skew is applied is
A third cut portion that forms a part of the first end surface and is sheared so as to incline at a predetermined inclination angle with respect to the third direction.
A fourth cut portion that forms a part of the second end surface and is sheared so as to incline at the predetermined inclination angle with respect to the third direction.
With
The predetermined tilt angle of the third cut portion and the fourth cut portion coincides with the tilt angle of the skew with respect to the third direction.
The third cut portion is sheared from one end side in the third direction to the other end side, and the fourth cut portion is sheared from the other end side in the third direction to the one end side. Electric.

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