TWI735185B - Stator and motor - Google Patents

Abstract

This invention provides a stator (10), including: an insulator (2), a winding (4), a power supply pull-out wire, a jumper (53), a terminal (3), and a resin model part (6). In windings (4), a core wire (41) held at the portion inside the first slit (31) is electrically connected to the terminal (3). A lead wire (51) of the twisted wire held in the portion of the power supply pull-out wire held in the second slit (32) is electrically connected to the terminal (3). An insulation coating (52) remains in the power supply pull-out wire other than the portion held in the second slit (32). The resin mold part (6) seals the terminal (3).

Description

Stator and motor

The present invention relates to a stator and a motor provided with connection terminals.

Conventionally, the stator of the electric motor is provided with a conductive terminal for conducting the winding and the lead wire. For example, Patent Document 1 discloses a terminal in which a winding groove for holding a winding wire and a lead groove for holding a lead wire are formed.

The width of the winding groove is smaller than the outer diameter of the winding, and the width of the lead groove is smaller than the outer diameter of the lead. Therefore, when the winding is inserted into the winding groove, the insulating coating of the winding is cut off by the inner wall of the winding groove, and the core wire is exposed. Furthermore, when the lead wire is inserted into the lead groove, the insulating coating of the lead wire will be cut off by the inner wall of the lead groove to expose the wire. Thereby, the core wire of the winding and the lead wire of the lead wire will contact with the terminal, and the winding and lead wire will be conducted with the terminal.

Furthermore, Patent Document 2 discloses a terminal in which a cutout is formed in which the insulation coating of the end portion of the winding can be peeled off. Patent Document 2 uses a winding in which a plurality of thin core wires are collectively covered with an insulating coating. [Prior Technical Documents] [Patent Documents]

(Patent Document 1) JP 2001-197699 A (Patent Document 2) JP 2002-142416 A

(The problem to be solved by the invention)

In the case of "the lead wire formed by covering a stranded wire with a plurality of wires together with an insulating coating", when the insulating coating of the lead wire is cut off due to the inner wall of the lead groove, the stranded wire is exposed in the lead groove The movement of each wire of the stranded wire is allowed in the slot. Therefore, the position of each wire in the lead groove may change due to vibration or the like generated during the driving of the motor. However, in the technique disclosed in Patent Document 1 mentioned above, since no measures are taken to restrict the movement of the wires in the lead grooves, the wires are separated from the connection terminals due to vibrations generated during the driving of the motor, which may occur. The problem of poor contact between the lead wire and the terminal.

In Patent Document 2 mentioned above, there is no disclosure about peeling the insulation coating of a lead wire formed by collectively covering a stranded wire having a plurality of conductive wires with an insulation coating. Furthermore, the aforementioned Patent Document 2 does not disclose any means for restricting the movement of each core wire in the incision.

The present invention was made in view of the above-mentioned problems, and its object is to obtain a stator that is less prone to poor contact between the lead wire and the terminal. (Means to solve the problem)

In order to solve the above-mentioned problems and achieve the objective, the stator of the present invention has the back of the core and a plurality of teeth protruding from the back of the core. The stator system is equipped with: an insulator, which covers the teeth; a winding, which is an insulated conductor formed by covering a conductive core wire with an insulating coating; and a power pull-out wire, which is also covered with an insulating coating and a conductive strand. Insulated conductor made of wire; Jumper wire is an insulated conductor formed by covering conductive stranded wires together with an insulating coating; Terminals are conductive and fixed to the insulator, and make the winding and power supply pull The outlet wire is conductive; and the resin mold part is a sealed insulator. A first slit for holding the winding wire and a second slit for holding the power pull-out wire are formed on the connection terminal. The width of the first slit is formed to be smaller than the outer diameter of the part covered by the insulating coating in the winding. The width of the second slit is formed to be smaller than the outer diameter of the part covered by the insulating coating in the power pull-out wire. The insulating coating of the part held in the first slit of the winding wire is peeled off, and the core wire is electrically connected to the terminal. The insulating coating of the part held in the second slit of the power pull-out wire is peeled off, and the stranded wire is connected to the connection terminal. An insulating coating is left in the power pull-out wire except for the part held in the second slit. The resin mold part seals the terminal. (Effects of the invention)

According to the present invention, it is possible to achieve the effect that poor contact between the lead wire and the connection terminal is less likely to occur.

Hereinafter, the stator and the motor of the embodiment of the present invention will be described in detail based on the drawings. In addition, the present invention is not limited by this implementation type.

Implementation Type 1 Fig. 1 is a diagram of a motor 100 having a stator 10 according to Embodiment 1 of the present invention viewed along the axial direction. In addition, for the convenience of description, the rotor 20 is shown as a dotted shadow in the first figure, and the winding 4 is shown as a broken line. In addition, Fig. 1 is a diagram of one end 10a along the axial direction of the stator 10 seen along the axial direction while omitting the resin mold part 6 shown in Fig. 2. The electric motor 100 includes a stator 10, a rotor 20 and a casing 30. In this embodiment, the electric motor 100 is a three-phase alternating current rotary electric motor. The stator 10 is formed in a cylindrical shape having a central axis C. As shown in FIG. The rotor 20 is arranged inside the stator 10. A gap is provided between the rotor 20 and the stator 10. The rotor 20 is connected to a shaft (not shown), and can rotate about the central axis C. As shown in FIG. The housing 30 is a metal member that constitutes the housing of the electric motor 100 and houses the stator 10 and the rotor 20. In the following description, when describing directions for each component of the electric motor 100, the axial, radial, and circumferential directions of the stator 10 are used as a reference.

Fig. 2 is a perspective view showing a motor 100 having a stator 10 according to the first embodiment of the present invention. As shown in FIGS. 1 and 2, the stator 10 includes a stator core 1, an insulator 2, a terminal 3, a winding 4, a lead wire 5, and a resin mold part 6.

The stator core 1 shown in FIG. 1 is formed by laminating a plurality of thin metal plates. The stator core 1 has a cylindrical core back portion 11 and a plurality of teeth 12 protruding radially inward from the inner peripheral surface of the core back portion 11. The teeth 12 are covered by the insulator 2.

The insulator 2 is mounted on the stator core 1 and is a resin member that electrically insulates the stator core 1 and the winding 4. The material of the insulator 2 is not particularly limited as long as it is a resin having insulating properties. The insulator 2 is divided into plural pieces. The plurality of insulators 2 are arranged in a ring shape along the circumferential direction.

FIG. 3 is a perspective view showing an insulator 2 and a connection terminal 3 included in the stator 10. The insulator 2 has an outer peripheral wall 21, an inner peripheral wall 22 arranged on the radially inner side of the outer peripheral wall 21, and a connecting portion 23 that connects the outer peripheral wall 21 and the inner peripheral wall 22.

The outer peripheral wall 21 is a portion extending in the circumferential direction. The outer peripheral wall 21 is formed with a first cavity 24 into which the terminal 3 is inserted, a second cavity 25 into which the winding 4 passes, and a third cavity 26 into which the lead wire 5 passes. The first cavity 24 extends substantially along the circumferential direction. The second cavity 25 and the third cavity 26 extend in the radial direction and cross a part of the first cavity 24. The second cavity 25 and the third cavity 26 are arranged at intervals in the circumferential direction.

The inner peripheral wall 22 is a portion extending in the circumferential direction. The height of the inner peripheral wall 22 is formed to be lower than the height of the outer peripheral wall 21.

The connecting portion 23 extends in the circumferential direction and is a portion where the winding wire 4 is wound. The connecting portion 23 connects the outer peripheral wall 21 and the inner peripheral wall 22 at a position that does not interfere with the second cavity 25 and the third cavity 26.

Fig. 4 is a cross-sectional view showing a state in which the winding 4 and the terminal 3 are connected, and is a cross-sectional view of the insulator 2 and the terminal 3 shown in Fig. 3 along the IV-IV line. Fig. 5 is a cross-sectional view showing a state in which the winding 4 is connected to the lead wire 5 and the terminal 3, and is a cross-sectional view of the insulator 2 and the terminal 3 shown in Fig. 3 along the V-V line. As shown in FIGS. 4 and 5, the terminal 3 is a conductive metal member that is fixed to the insulator 2 and connects the winding 4 and the lead 5 to each other. As shown in Fig. 3, the connection terminal 3 is formed by performing drilling and bending processing on a piece of metal plate. The connection terminal 3 is bent into a U-shape, and has a bottom wall 35 that connects two opposing side walls 34 and side walls 34 to each other. By inserting the connecting terminal 3 into the first cavity 24, the connecting terminal 3 is fixed to the insulator 2.

As shown in FIGS. 3 and 5, the terminal 3 is formed with a first slit 31 for holding the winding 4 and a second slit 32 for holding the lead wire 5. The first slit 31 and the second slit 32 extend from one side wall 34 to the other side wall 34 through the bottom wall 35. When the connection terminal 3 is inserted into the first cavity 24, the first slit 31 communicates with the second cavity 25, and the second slit 32 communicates with the third cavity 26. A protrusion 33 protruding toward the inner surface of the first cavity 24 is formed at both ends of each side wall 34 along the circumferential direction. The protrusion 33 contacts the inner surface of the first cavity 24 and plays a role of restraining the connection terminal 3 from being separated from the first cavity 24.

As shown in FIG. 5, the winding 4 is an insulated conductor formed by covering a conductive core wire 41 with an insulating coating 42. In addition, in Fig. 5, for convenience of description, the insulating coating 42 is illustrated by a broken line. The core wire 41 is, for example, a copper wire or the like. Electric power is supplied to the winding 4 through a lead 5 through an inverter (inverter, also referred to as an “inverter”) not shown. The attraction and repulsion between the magnetic flux generated by the current flowing through the winding 4 and the magnetic flux generated from the permanent magnet (not shown) of the rotor 20 generates torque in the motor 100. As shown in FIG. 1, the winding 4 is wound around the connection part 23 of the insulator 2, and a plurality of coils 43 are formed. The coil 43 is connected by U phase, V phase, and W phase. Each coil 43 becomes a U-phase coil, a V-phase coil, or a W-phase coil.

As shown in FIG. 5, the lead wire 5 is an insulated conductor formed by collectively covering a stranded wire having a plurality of conductive wires 51 with an insulating coating 52. In addition, in Fig. 5, for the convenience of description, the insulating coating 52 is illustrated with a broken line. The lead wire 51 is, for example, a copper wire or the like. The lead wire 51 is used for the connection between the inverter and the motor 100, which are not shown, or the connection between the coil 43. That is, the lead wire 5 is used as a power pull-out wire, a jumper wire, and a neutral wire. The power pull-out wire is an electric wire for supplying electric power to each coil 43 by an inverter (not shown). The lead wire 5 arranged in the second slit 32 of the connection terminal 3 is a power pull-out wire.

Figure 6 is a perspective view of jumper 53. A lead wire 5 is wired between one coil 43 and the other coil 43 to form a jumper 53. The jumper 53 is a wire used to electrically connect the coils 43 of the same phase. In addition, in FIG. 6, only the jumper 53 is connected to one coil 43, and the state where the other coils 43 are connected is omitted. The two coils 43 are continuously connected by the lead wire 5. The neutral wire is used to connect the wires between the end points of the coils 43 of different phases. Although omitted in the figure, the lead 5 between the end points of the coils 43 of different phases among the plurality of lead wires 5 is arranged in the vicinity of the inner peripheral wall 22 of the insulator 2.

The width of the first slit 31 is formed to be smaller than the outer diameter of the portion covered by the insulating coating 42 in the winding 4. Therefore, when the connection terminal 3 is inserted into the first cavity 24, the insulating coating 42 of the winding 4 is shaved off due to the inner wall of the first slit 31, and the core wire 41 is exposed. Thereby, the core wire 41 of the winding 4 is in contact with the connection terminal 3, and the winding 4 and the connection terminal 3 are conducted. In the winding 4, only the insulating coating 42 at the portion held in the first slit 31 is shaved off, so that the core wire 41 and the terminal 3 are electrically connected. The core wire 41 is crimped to the inner wall of the first slit 31 in a state where only the insulating coating 42 of the portion held in the first slit 31 of the winding 4 is shaved off. An insulating coating 42 remains in the winding 4 other than the part held in the first slit 31.

The width of the second slit 32 is formed to be smaller than the outer diameter of the portion covered by the insulating coating 52 in the lead 5. Therefore, when the connection terminal 3 is inserted into the first cavity 24, the insulating coating 52 of the lead wire 5 is shaved off due to the inner wall of the second slit 32, and the wire 51 is exposed. Thereby, the lead wire 51 of the lead wire 5 is in contact with the connection terminal 3, and the lead wire 5 and the connection terminal 3 are conducted. Only the insulating coating 52 of the lead wire 5 held in the second slit 32 is shaved off, so that the lead wire 51 and the connection terminal 3 are conducted. In a state where the insulating coating 52 of the lead wire 5 only held in the second slit 32 is shaved off, the stranded wire having a plurality of wires 51 is crimped to the inner wall of the second slit 32. In the lead wire 5 other than the part held in the second slit 32, an insulating coating 52 remains. In addition, a plurality of leads 5 may be held in one second slit 32. Furthermore, the winding 4 and the lead 5 may be held in the same slit.

As shown in Figs. 1 and 2, the resin mold part 6 is a part where the stator core 1 and the insulator 2 are sealed. The resin mold part 6 seals the terminal 3. As shown in FIG. 5, the resin mold part 6 seals the first slit 31 and the second slit 32 of the terminal 3 to restrict the movement of the winding 4 and the lead 5 relative to the terminal 3. In addition, in FIG. 5, for the convenience of description, the area of the resin model portion 6 is illustrated by dot-shading. The resin mold portion 6 is formed of a resin having no adhesiveness and having an insulating property. The coefficient of linear expansion of the resin model part 6 is preferably set to a relationship of the coefficient of linear expansion of the terminal 3×0.8<the coefficient of linear expansion of the resin model part 6<the coefficient of linear expansion of the terminal 3×1.2. Furthermore, the linear expansion coefficient of the resin model part 6 is preferably set to a relationship of linear expansion coefficient of the insulator 2×0.8<linear expansion coefficient of the resin model part 6<linear expansion coefficient of the insulator 2×1.2.

The arrangement of the connection terminal 3, the lead wire 5, the jumper wire 53, and the resin mold part 6 will be described with reference to Figs. 1, 2 and 6. As shown in FIG. 2, the stator 10 has one end 10a and the other end 10b along the axial direction. At one end 10a along the axial direction, a part of the resin mold portion 6 bulges into a cylindrical shape. As shown in Fig. 1, a terminal 3, a lead wire 5, and the like are arranged at one end 10a of the stator 10 along the axial direction. The connection terminal 3, the lead wire 5, etc. are covered with the resin mold part 6 shown in 2nd figure. FIG. 6 is a diagram showing the other end 10b of the stator 10 along the axial direction. A jumper 53 is arranged at the other end 10b of the stator 10 along the axial direction. The jumper wire 53 is arranged on the side opposite to the connection terminal 3 along the axial direction of the stator 10. One end 10a along the axial direction of the stator 10 where the winding 4 and the lead 5 are connected with the terminal 3 is set as the terminal side 40, and the winding 4 and the lead 5 are not connected with the terminal 3 along the axial direction of the stator 10 When the other end 10b is set to the reverse wiring side 50, the jumper 53 is arranged on the reverse wiring side 50.

Next, the effect of the stator 10 will be described.

In this embodiment, the terminal 3 is sealed by the resin mold part 6, the winding 4 and the lead 5 are fixed relative to the terminal 3 so as not to move, and the crimping state of the winding 4 and the lead 5 is stable. Therefore, in the case of using "the lead wire 5 formed by collectively covering the conductive strands of a plurality of conductive wires 51 with an insulating coating 52", the resin mold part 6 can also restrict the inside of the second slit 32 The movement of each lead wire 51 makes it difficult for the lead wire 51 of the lead 5 to be separated from the terminal 3 due to vibration or the like generated when the motor 100 is driven. Furthermore, by sealing the connection terminal 3 by the resin mold part 6, the heat dissipation of the connection terminal 3 can be improved.

In this embodiment, by sealing the connection terminal 3 by the resin mold part 6, the winding 4 that has been arranged in the first slit 31 of the connection terminal 3 can be surely held. Furthermore, by sealing the connection terminal 3 by the resin mold part 6, since the heat of the winding wire 4 is conducted to the resin mold part 6, the temperature of the winding wire 4 can be reduced.

In Patent Document 2 described above, an insulated conductor formed by covering a plurality of core wires with an insulating coating at a time is a winding wire. On the other hand, in this embodiment, the lead wire 5 is an insulated conductor formed by covering a stranded wire having a plurality of wires 51 with an insulating coating 52 at one time. The winding of Patent Document 2 is a wire for generating magnetic flux, which is different from the lead wire 5 of the present embodiment, which is a power pull-out wire, a jumper wire 53, or a neutral wire.

In this embodiment, by forming the first slit 31 for holding the winding 4 and the second slit 32 for holding the lead 5 in the terminal 3, the winding 4 and the lead can be held together with one terminal 3 5. This eliminates the need for lead terminals, so it is possible to reduce the number of parts and achieve cost reduction.

In this embodiment, the lead wire 5 formed by covering the stranded wire with a plurality of wires 51 is collectively covered with an insulating coating 52. Since the lead wire 5 is used, a plurality of wires constituting the lead wire 5 can be wired together. Therefore, the use of the lead 5 becomes easy.

In this embodiment, when the terminal 3 is inserted into the first cavity 24, the insulating coating 52 of the lead 5 is cut off due to the inner wall of the second slit 32, and the lead 5 is only held in the second slit. The insulating coating 52 in the area 32 is shaved off, so that the lead wire 51 and the terminal 3 are connected. Thereby, since a part of the lead wire 5 other than the part held in the second slit 32 is covered with the insulating coating 52, the bundled state of the lead wire 5 can be maintained.

In this embodiment, since the jumper wire 53 is arranged on the reverse wire side 50, the space on the wire side 40 can be reduced and the motor 100 can be reduced in size. Furthermore, since the jumper wire 53 is arranged on the reverse wire side 50, the number of lead wires 5 connected between the coils 43 on the wire side 40 can be reduced.

In this embodiment, by setting the coefficient of linear expansion of the resin model part 6 to the relationship of the coefficient of linear expansion of the terminal 3 × 0.8 <the coefficient of linear expansion of the resin model part 6 <the coefficient of linear expansion of the terminal 3 × 1.2, The difference in the coefficient of linear expansion between the resin model portion 6 and the connection terminal 3 can be reduced. Furthermore, by setting the linear expansion coefficient of the resin model part 6 to the relationship of the linear expansion coefficient of the insulator 2 × 0.8 <the linear expansion coefficient of the resin model part 6 <the linear expansion coefficient of the insulator 2 × 1.2, the resin model part can be reduced. 6 and the difference in the coefficient of linear expansion between the insulator 2. Therefore, even when a temperature change occurs, the thermal expansion difference between the resin mold part 6 and the terminal 3 and between the resin mold part 6 and the insulator 2 can be suppressed, and the crimping state of the winding 4 and the lead 5 can be stabilized. .

Implementation Type 2 Fig. 7 is a view of the insulator 2 of the stator 10 of the second embodiment of the present invention seen along the axial direction. In addition, in the second embodiment, the same reference numerals are assigned to the parts overlapping with the aforementioned embodiment 1 and the description is omitted.

A line along the radial direction passing through the center of the insulator 2 in the circumferential direction is referred to as the center line L. The insulator 2 of the second embodiment is formed symmetrically with respect to the center line L. The first cavity 24 is arranged in the central part of the insulator 2 along the circumferential direction. In this embodiment, by arranging the first cavity 24 in the central part of the insulator 2, the thickness of the wall surrounding the first cavity 24 is approximately the same across the center line L. Therefore, it can be applied to the terminal The pressure of 3 is roughly equal. Thereby, it is possible to prevent wire breakage when the winding 4 and the lead wire 5 are crimped to the terminal 3. In addition, in this embodiment, the winding 4 is arranged on the left side of the paper, and the lead wire 5 is arranged on the right side of the paper in FIG. Furthermore, the insulator 2 system may be completely formed in line symmetry with respect to the center line L.

Implementation Type 3 Fig. 8 is a side view showing the insulator 2 of the stator 10 of the third embodiment of the present invention. In addition, in the third embodiment, the same reference numerals are assigned to the parts overlapping with the aforementioned embodiment 1 and the description is omitted.

The height of the inner peripheral wall 22 of the insulator 2 along the axial direction is equal to the height of the outer peripheral wall 21 along the axial direction. One end surface 22a of the inner peripheral wall 22 along the axial direction and one end surface 21a of the outer peripheral wall 21 along the axial direction are located on the same plane orthogonal to the axial direction. In this embodiment, since the one end surface 22a of the inner peripheral wall 22 along the axial direction and the end surface 21a of the outer peripheral wall 21 along the axial direction are located on the same plane in the axial direction, the lead 5 can be stably arranged inside Between the peripheral wall 22 and the outer peripheral wall 21. Therefore, the crimping state of the lead wire 5 with respect to the connection terminal 3 can be stabilized.

Implementation Type 4 Fig. 9 is a perspective view showing the insulator 2 of the stator 10 of the fourth embodiment of the present invention. In addition, in the fourth embodiment, the same reference numerals are assigned to the parts overlapping with the aforementioned embodiment 1 and the description is omitted.

In the outer peripheral wall 21, a part of the wall surrounding the first cavity 24 is formed with a low wall part 27 lower than the other parts in the insertion direction of the terminal 3. The low wall portion 27 is tied to a wall located between the second cavity 25 and the third cavity 26 in the radially outer side of the first cavity 24. By setting the height of a part of the wall surrounding the first cavity 24 to be lower than the height of other parts, it is possible to reduce the stress applied from the wall surrounding the first cavity 24 to the connection terminal (not shown), and suppress excessive The stress is applied to the windings and leads not shown. Furthermore, it is also possible to reduce the thermal stress caused by the difference in the thermal expansion coefficient of the insulator 2 and the terminal 3 at high temperatures. In addition, if the position of the low wall portion 27 is a part of the wall surrounding the first cavity 24, it is not limited to the position shown in FIG. 9.

Implementation Type 5 Fig. 10 is a front view showing the connection terminal 3 of the stator 10 of the fifth embodiment of the present invention. In addition, in the embodiment, the parts overlapping with the aforementioned embodiment 1 are given the same reference numerals, and the description is omitted. In Fig. 10, for convenience of explanation, the insulating coatings 42, 52 are shown by broken lines.

In the connection terminal 3 of the fifth embodiment, a first slit 31 and two second slits 32 are formed. In this way, it is possible to conduct conduction with one winding 4 and two lead wires 5 together. Therefore, it is possible to reduce the number of connection terminals 3 and achieve cost reduction.

If the configuration shown in the above embodiment is an example of the content of the present invention, it may be combined with other known technologies, and part of the configuration may be omitted or changed without departing from the scope of the present invention.

In the embodiment, a case where the present invention is applied to a rotary motor is illustrated, but it can also be applied to, for example, a linear motor.

1: Stator core 2: Insulator 3: Wiring terminal 4: winding 5: Lead 6: Resin Model Department 10: Stator 10a: one end 10b: the other end 11: Iron core back 12: Teeth 20: Rotor 21: Peripheral wall 21a: one end face 22: Inner peripheral wall 22a: one end face 23: Connection 24: The first cavity 25: second cavity 26: third cavity 27: Low wall 30: Chassis 31: First All Seam 32: second cut 33: protrusion 34: side wall 35: bottom wall 40: Wiring side 41: core wire 42: Insulation coating 43: Coil 50: Reverse wiring side 51: Wire 52: Insulation coating 53: Jumper 100: electric motor C: Central axis L: Centerline

Fig. 1 is a diagram of a motor having a stator according to Embodiment 1 of the present invention viewed along the axial direction. Figure 2 is a perspective view showing a motor having a stator according to Embodiment 1 of the present invention. Figure 3 is a perspective view showing an insulator and connection terminals provided in the stator. Figure 4 is a cross-sectional view showing the state where the winding and the terminal are connected, and is a cross-sectional view of the insulator and the terminal shown in Figure 3 along the IV-IV line. Figure 5 is a cross-sectional view showing the state where the wire is connected to the lead wire and the terminal, and is a V-V line cross-sectional view of the insulator and the terminal shown in Figure 3. Figure 6 is a perspective view showing the jumper. Fig. 7 is a view of the insulator of the stator of Embodiment 2 of the present invention seen along the axial direction. Fig. 8 is a side view showing the insulator of the stator of Embodiment 3 of the present invention. Fig. 9 is a perspective view showing the insulator of the stator of the fourth embodiment of the present invention. Fig. 10 is a front view showing the connection terminal of the stator of the fifth embodiment of the present invention.

2: Insulator

3: Wiring terminal

4: winding

5: Lead

6: Resin Model Department

10: Stator

21: Peripheral wall

24: The first cavity

31: First All Seam

32: second cut

33: protrusion

34: side wall

35: bottom wall

41: core wire

42: Insulation coating

51: Wire

52: Insulation coating

Claims (9)

A stator having a rear back of an iron core and a plurality of teeth protruding from the back of the iron core. The stator is provided with: an insulator covering the aforementioned teeth; a winding formed by covering a conductive core wire with an insulating coating Insulated conductor; power pull-out line is an insulated conductor formed by covering conductive strands with an insulating coating; jumper is an insulated conductor formed by covering conductive strands with an insulating coating , And is a wire that electrically connects the aforementioned winding wires of the same phase; a connection terminal, which is conductive and fixed to the aforementioned insulator, and makes the aforementioned winding wire and the aforementioned power pull-out wire conduction; and a resin mold part, Seal the insulator; a first slit for holding the winding and a second slit for holding the power pull-out line are formed in the connection terminal, and the width of the first slit is formed to be larger than that of the winding by the insulation The outer diameter of the covered part is smaller, the width of the second slit is formed to be smaller than the outer diameter of the part covered by the insulating coating in the power pull-out wire, and the winding is held in The insulation coating of the portion within the first slit is peeled off, and the core wire is electrically connected to the terminal, and the insulation coating of the portion held in the second slit of the power pull-out wire is peeled off, and the strand is twisted. The wire is connected to the aforementioned terminal, The insulating coating is left in the part held in the second slit of the power pull-out wire, and the resin mold part seals the connection terminal. The stator described in claim 1, wherein the insulation system is arranged in plural along the circumferential direction of the stator, the winding is wound around the insulator to form a plurality of coils, and the jumper wire is One coil of the plurality of coils is connected to the other coil, the connecting terminal is arranged at one end along the axial direction of the stator, and the jumper wire is arranged along the axial direction of the stator opposite to the connecting terminal side. The stator described in claim 2 wherein the insulator is formed with a cavity into which the terminal is inserted, and the cavity is arranged in the central part of the insulator along the circumferential direction of the stator. The stator described in claim 3, wherein the insulation system has: an outer peripheral wall for forming the cavity, an inner peripheral wall arranged on the radially inner side of the outer peripheral wall, and a connection between the outer peripheral wall and the outer peripheral wall The inner peripheral wall and the connecting portion where the winding is wound, the height of the inner peripheral wall is equal to the height of the outer peripheral wall. The stator according to claim 4, wherein the height of a part of the outer peripheral wall surrounding the cavity is lower than the height of the other part. The stator described in any one of items 1 to 5 in the scope of the patent application, wherein the linear expansion coefficient of the resin model part is set to the linear expansion coefficient of the connection terminal × 0.8<the linear expansion coefficient of the resin model part< The relationship between the coefficient of linear expansion of the aforementioned terminal x 1.2. The stator described in any one of items 1 to 5 in the scope of the patent application, wherein the linear expansion coefficient of the resin model part is set to the linear expansion coefficient of the insulator × 0.8 <the linear expansion coefficient of the resin model part <the aforementioned The relationship between the coefficient of linear expansion of the insulator × 1.2. The stator described in item 6 of the scope of patent application, wherein the linear expansion coefficient of the resin model part is set to the linear expansion coefficient of the insulator × 0.8 <the linear expansion coefficient of the resin model part <the linear expansion coefficient of the insulator × 1.2 The relationship. An electric motor is provided with: the stator described in any one of items 1 to 8 in the scope of patent application; and a rotor arranged in the stator with a gap therebetween.

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