CN113615047B - Stator and motor - Google Patents
Stator and motor Download PDFInfo
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- CN113615047B CN113615047B CN201980094368.XA CN201980094368A CN113615047B CN 113615047 B CN113615047 B CN 113615047B CN 201980094368 A CN201980094368 A CN 201980094368A CN 113615047 B CN113615047 B CN 113615047B
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- terminal
- stator
- winding
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- lead
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/52—Fastening salient pole windings or connections thereto
- H02K3/521—Fastening salient pole windings or connections thereto applicable to stators only
- H02K3/522—Fastening salient pole windings or connections thereto applicable to stators only for generally annular cores with salient poles
Abstract
The stator (10) has an insulator (2), a winding (4), a lead (5), a terminal (3), and a resin molding (6). A1 st slit (31) for holding the winding (4) and a 2 nd slit (32) for holding the lead (5) are formed in the terminal (3). The width of the 1 st slit (31) is smaller than the outer diameter of a portion of the winding (4) covered with the insulating coating (42). The width of the 2 nd slit (32) is smaller than the outer diameter of a portion of the lead (5) covered by the insulating cover (52). The portion of the winding (4) held in the 1 st slit (31) is electrically connected to the terminal (3) by peeling off the insulating coating (42). The portion of the lead (5) held in the No. 2 slit (32) is formed by peeling off the insulating coating (52) and the lead (51) of the litz wire is electrically connected to the terminal (3). The resin molding part (6) encapsulates the terminal (3).
Description
Technical Field
The present invention relates to a stator having a terminal and a motor.
Background
Conventionally, a stator of an electric motor is provided with conductive terminals for conducting windings and leads. For example, patent document 1 discloses a terminal in which a winding slot for holding a winding and a lead slot for holding a lead are formed.
The width of the winding slot is smaller than the outer diameter of the winding, and the width of the lead slot is smaller than the outer diameter of the lead. Therefore, when the winding is inserted into the winding slot, the insulating coating portion of the winding is shaved off by the inner wall of the winding slot, and the core wire is exposed. When the lead is inserted into the lead groove, the insulating coating portion of the lead is shaved off by the inner wall of the lead groove, and the lead is exposed. Therefore, the core wire of the winding and the lead wire of the lead wire are contacted with the connecting terminal, and the winding and the lead wire are conducted with the connecting terminal.
Patent document 1: japanese patent laid-open No. 2001 + 197699
Patent document 2: japanese laid-open patent publication No. 2002-142416
Disclosure of Invention
In the case of using a lead wire in which a stranded wire having a plurality of wires is collectively covered with an insulating coating portion, if the insulating coating portion of the lead wire is cut off by the inner wall of the lead wire groove and the stranded wire is exposed, the movement of each wire of the stranded wire is allowed in the lead wire groove. Therefore, the position of each wire in the wire guide groove may change due to vibration or the like generated when the motor is driven. However, in the technique disclosed in patent document 1, since there is no means for restricting the movement of each lead wire in the lead wire groove, there is a problem that the lead wire and the terminal are separated from each other due to vibration or the like generated when the motor is driven, and a contact failure between the lead wire and the terminal occurs.
The present invention has been made in view of the above circumstances, and an object of the present invention is to obtain a stator in which contact failure between a lead wire and a terminal is less likely to occur.
In order to solve the above problems and achieve the object, a stator according to the present invention includes a core print and a plurality of teeth projecting from the core print. The stator has: an insulator covering the teeth; a winding which is an insulated conductor in which a conductive core wire is covered with an insulating coating; a lead wire which is an insulated conductor in which conductive strands are collectively covered with an insulating coating portion; a conductive connection terminal fixed to the insulator to conduct the winding and the lead; and a resin molding part which encapsulates the insulator. A1 st slit for holding a winding and a 2 nd slit for holding a lead are formed in a terminal. The width of the 1 st slit is formed smaller than the outer diameter of a portion of the winding covered with the insulating coating. The width of the 2 nd slit is formed smaller than the outer diameter of the portion of the lead covered by the insulating covering portion. The portion of the winding held in the 1 st slit is electrically connected to the terminal by peeling off the insulating coating. The portion of the lead wire held in the 2 nd slit is electrically connected to the terminal by peeling off the insulating coating portion. The resin molding part encapsulates the wire terminals.
ADVANTAGEOUS EFFECTS OF INVENTION
According to the present invention, there is an effect that a contact failure between the lead and the terminal is less likely to occur.
Drawings
Fig. 1 is a view of an electric motor having a stator according to embodiment 1 of the present invention, as viewed in an axial direction.
Fig. 2 is a perspective view showing an electric motor having a stator according to embodiment 1 of the present invention.
Fig. 3 is a perspective view showing 1 insulator and terminal of the stator.
Fig. 4 is a sectional view showing a state where the winding and the terminal are electrically connected, and is an IV-IV line sectional view of the insulator and the terminal shown in fig. 3.
Fig. 5 is a cross-sectional view showing a state in which the winding and the lead wire are electrically connected to the terminal, and is a V-V line cross-sectional view of the insulator and the terminal shown in fig. 3.
Fig. 6 is an oblique view showing a jumper line.
Fig. 7 is a view of the insulator of the stator according to embodiment 2 of the present invention as viewed in the axial direction.
Fig. 8 is a side view showing an insulator of a stator according to embodiment 3 of the present invention.
Fig. 9 is a perspective view showing an insulator of a stator according to embodiment 4 of the present invention.
Fig. 10 is a front view showing a terminal of a stator according to embodiment 5 of the present invention.
Detailed Description
Next, a stator and a motor according to an embodiment of the present invention will be described in detail with reference to the drawings. The present invention is not limited to the embodiments.
Embodiment 1.
Fig. 1 is a view of an electric motor 100 having a stator 10 according to embodiment 1 of the present invention, as viewed in an axial direction. In fig. 1, for convenience of explanation, the rotor 20 is shown by hatching, and the winding 4 is shown by a broken line. Fig. 1 is a view of one end 10a of the stator 10 in the axial direction, which is viewed in the axial direction, with the resin mold 6 shown in fig. 2 omitted. The motor 100 has a stator 10, a rotor 20, and a frame 30. In the present embodiment, the motor 100 is a three-phase ac rotary motor. The stator 10 is formed in a cylindrical shape having a central axis C. The rotor 20 is disposed 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 is rotatable about the central axis C. The frame 30 is a metal member that constitutes a housing of the motor 100 and houses the stator 10 and the rotor 20. In the following description, directions of the respective components of the motor 100 are described with reference to the axial direction, the radial direction, and the circumferential direction of the stator 10.
Fig. 2 is a perspective view showing a motor 100 having a stator 10 according to embodiment 1 of the present invention. As shown in fig. 1 and 2, the stator 10 includes a stator core 1, an insulator 2, a terminal 3, a winding 4, a lead 5, and a resin mold 6.
The stator core 1 shown in fig. 1 is formed by laminating a plurality of metal thin plates. The stator core 1 has a cylindrical core holder 11 and a plurality of teeth 12 projecting radially inward from the inner peripheral surface of the core holder 11. The teeth 12 are covered by the insulator 2.
The insulator 2 is a resin member that is attached to the stator core 1 and electrically insulates the stator core 1 and the winding 4 from each other. 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 a plurality of parts. The plurality of insulators 2 are arranged annularly in the circumferential direction.
Fig. 3 is a perspective view showing 1 insulator 2 and terminal 3 of the stator 10. The insulator 2 includes an outer peripheral wall 21, an inner peripheral wall 22 disposed radially inward of the outer peripheral wall 21, and a connecting portion 23 connecting 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 1 st cavity 24 into which the terminal 3 is inserted, a 2 nd cavity 25 through which the winding 4 passes, and a 3 rd cavity 26 through which the lead 5 passes. The 1 st cavity 24 extends generally circumferentially. The 2 nd cavity 25 and the 3 rd cavity 26 extend in the radial direction, and intersect with a part of the 1 st cavity 24. The 2 nd cavity 25 and the 3 rd cavity 26 are arranged at intervals in the circumferential direction.
The inner circumferential wall 22 is a portion extending in the circumferential direction. The height of the inner peripheral wall 22 is formed lower than the height of the outer peripheral wall 21.
The connection portion 23 extends in the circumferential direction and is wound around the winding 4. The connecting portion 23 connects the outer peripheral wall 21 and the inner peripheral wall 22 at a position not interfering with the 2 nd cavity 25 and the 3 rd cavity 26.
Fig. 4 is a cross-sectional view showing a state where the winding 4 and the terminal 3 are electrically connected, and is an IV-IV line cross-sectional view of the insulator 2 and the terminal 3 shown in fig. 3. Fig. 5 is a cross-sectional view showing a state in which the winding 4 and the lead 5 are electrically connected to the terminal 3, and is a V-V line cross-sectional view of the insulator 2 and the terminal 3 shown in fig. 3. As shown in fig. 4 and 5, the terminal 3 is a conductive metal member fixed to the insulator 2 to conduct the coil 4 and the lead 5. As shown in fig. 3, the terminal 3 is formed by punching and bending a metal plate. The terminal 3 has a bottom wall 35 bent in a U shape and connecting the 2 opposing side walls 34 and 34 to each other. The terminal 3 is fixed to the insulator 2 by inserting the terminal 3 into the 1 st cavity 24.
As shown in fig. 3 and 5, the terminal 3 is formed with a 1 st slit 31 for holding the winding 4 and a 2 nd slit 32 for holding the lead 5. The 1 st slit 31 and the 2 nd slit 32 extend from one side wall 34 to the other side wall 34 through the bottom wall 35. In a state where the terminal 3 is inserted into the 1 st cavity 24, the 1 st slit 31 communicates with the 2 nd cavity 25, and the 2 nd slit 32 communicates with the 3 rd cavity 26. At both ends in the circumferential direction of each side wall 34, projections 33 are formed which project toward the inner surface of the 1 st cavity 24. The projection 33 is in contact with the inner surface of the 1 st cavity 24, and has a function of suppressing the pull-out of the terminal 3 from the 1 st cavity 24.
As shown in fig. 5, the winding 4 is an insulated conductor in which a conductive core wire 41 is covered with an insulating coating 42. In fig. 5, the insulating coating 42 is shown in a broken line for convenience of explanation. The core 41 is, for example, a copper wire or the like. Power is supplied to the winding 4 from an inverter, not shown, via a lead 5. A torque is generated in the motor 100 by attraction and repulsion of magnetic flux generated by a current flowing through the winding 4 and magnetic flux generated from a permanent magnet, not shown, of the rotor 20. As shown in fig. 1, a plurality of coils 43 are formed by winding the coil 4 around the connection portion 23 of the insulator 2. The coil 43 is wired for U-phase, V-phase, and W-phase, respectively. Each coil 43 is a U-phase coil, a V-phase coil, or a W-phase coil.
As shown in fig. 5, the lead 5 is an insulated conductor in which a conductive stranded wire having a plurality of wires 51 is collectively covered with an insulating coating 52. In fig. 5, the insulating coating 52 is shown in a broken line for convenience of explanation. The wire 51 is, for example, a copper wire or the like. The lead 5 is used for connection between the inverter and the motor 100 or connection between the coils 43, which are not shown. That is, the lead 5 is used as a power supply lead wire, a jumper wire, and a neutral wire. The power supply lead wire is an electric wire for supplying electric power from an inverter, not shown, to each coil 43. The lead 5 disposed in the 2 nd slit 32 of the terminal 3 is a power supply lead wire.
Fig. 6 is an oblique view showing the jumper line 53. The jumper wire 53 is formed by wiring the lead wire 5 between one coil 43 and the other coil 43. The jumper wire 53 is a wire for electrically connecting the coils 43 in the same phase. In fig. 6, only a state where the jumper wire 53 is connected to one coil 43 is illustrated, and a state where the jumper wire is connected to the other coil 43 is omitted. The 2 coils 43 are continuously connected by the lead wires 5. The neutral line is an electric wire for connecting between the end points of the coils 43 out of phase. Although not shown, the lead wires 5 connecting the end points of the coils 43 of different phases among the plurality of lead wires 5 are disposed in the vicinity of the inner peripheral wall 22 of the insulator 2.
The width of the 1 st slit 31 is formed smaller than the outer diameter of the portion of the winding 4 covered with the insulating coating 42. Therefore, when the terminal 3 is inserted into the 1 st cavity 24, the insulating coating 42 of the winding 4 is cut off by the inner wall of the 1 st slit 31, and the core wire 41 is exposed. Thereby, the core wire 41 of the winding 4 is brought into contact with the terminal 3, and the winding 4 and the terminal 3 are conducted. Only the portion of the winding 4 held in the 1 st slit 31 is the portion where the insulating coating 42 is peeled off and the core wire 41 is electrically connected to the terminal 3. Only the portion of the winding 4 held in the 1 st slit 31 is pressed against the inner wall of the 1 st slit 31 with the insulating coating 42 peeled off. The insulating coating 42 remains except for the portion of the winding 4 held in the 1 st slit 31.
The width of the 2 nd slit 32 is formed smaller than the outer diameter of the portion of the lead 5 covered with the insulating coating 52. Therefore, when the terminal 3 is inserted into the 1 st cavity 24, the insulating coating 52 of the lead 5 is cut off by the inner wall of the 2 nd slit 32, and the lead 51 is exposed. Thereby, the lead 51 of the lead 5 is brought into contact with the terminal 3, and the lead 5 and the terminal 3 are electrically connected. Only the portion of the lead 5 held in the 2 nd slit 32 is peeled off from the insulating coating 52, and the lead 51 is electrically connected to the terminal 3. Only a portion of the lead 5 held in the 2 nd slit 32 is a twisted wire having a plurality of wires 51 in a state where the insulating coating 52 is peeled off, and is pressure-bonded to the inner wall of the 2 nd slit 32. The insulating coating 52 remains except for the portion of the lead 5 held in the 2 nd slit 32. In addition, a plurality of leads 5 may be held in the 1 nd 2 nd slits 32. In addition, the winding 4 and the lead 5 may be held in the same slit.
As shown in fig. 1 and 2, the resin mold 6 is a portion for sealing the stator core 1 and the insulator 2. The resin mold 6 encapsulates the terminal 3. As shown in fig. 5, the resin mold 6 seals the 1 st slit 31 and the 2 nd slit 32 of the terminal 3, and regulates movement of the coil 4 and the lead 5 relative to the terminal 3. In fig. 5, for convenience of explanation, the region of the resin mold 6 is shown in a hatched manner. The resin mold 6 is made of a resin having no adhesive property and having an insulating property. The coefficient of linear expansion of the resin mold 6 is preferably set to a relationship of 0.8 < 6 < 1.2. The linear expansion coefficient of the resin molded portion 6 is preferably set to a relationship of 0.8, and 1.2, respectively, between the linear expansion coefficient of the insulator 2 and the linear expansion coefficient of the resin molded portion 6, and the linear expansion coefficient of the insulator 2.
Here, the arrangement of the wire terminal 3, the lead 5, the jumper wire 53, and the resin mold 6 will be described with reference to fig. 1, 2, and 6. As shown in fig. 2, the stator 10 has one end 10a and the other end 10b in the axial direction. At one end 10a in the axial direction of the stator 10, a part of the resin mold 6 is expanded into a cylindrical shape. As shown in fig. 1, at one end 10a in the axial direction of the stator 10, a terminal 3, a lead 5, and the like are arranged. The terminal 3, the lead 5, and the like are covered with a resin mold 6 shown in fig. 2. Fig. 6 is a view showing the other end 10b in the axial direction of the stator 10. A jumper wire 53 is disposed at the other end 10b in the axial direction of the stator 10. The jumper wire 53 is disposed on the opposite side of the terminal 3 in the axial direction of the stator 10. When one end 10a in the axial direction of the stator 10 in which the winding 4 and the lead 5 are connected by the connection terminal 3 is set as the connection side 40, and the other end 10b in the axial direction of the stator 10 in which the winding 4 and the lead 5 are not connected by the connection terminal 3 is set as the opposite connection side 50, the jumper wire 53 is arranged on the opposite connection side 50.
Next, the operation and effect of the stator 10 will be described.
In the present embodiment, the resin mold 6 encapsulates the terminal 3, and thereby the coil 4 and the lead 5 are immovably fixed to the terminal 3, and the pressure-bonded state of the coil 4 and the lead 5 is stable. Therefore, even when the lead 5 in which a stranded wire having a plurality of leads 51 is collectively covered with the insulating cover 52 is used, the movement of each lead 51 in the 2 nd slit 32 is restricted by the resin mold 6, and the lead 51 of the lead 5 and the terminal 3 are less likely to be separated from each other by vibration or the like generated when the motor 100 is driven. This makes it possible to prevent a contact failure between the lead 5 and the terminal 3. Further, the resin mold 6 encapsulates the terminal 3, thereby improving the heat dissipation of the terminal 3.
In the present embodiment, the resin mold 6 encapsulates the terminal 3, thereby reliably holding the coil 4 disposed in the 1 st slit 31 of the terminal 3. Further, since the resin mold 6 encapsulates the connection terminal 3, heat generated by the coil 4 is transmitted to the resin mold 6 to be dissipated, and thus the temperature of the coil 4 can be reduced.
In patent document 2, an insulated conductor in which a plurality of core wires are collectively covered with an insulating coating is a winding. On the other hand, in the present embodiment, the lead 5 is an insulated conductor in which a stranded wire having a plurality of lead wires 51 is collectively covered with an insulating coating 52. The winding of patent document 2 is an electric wire for generating magnetic flux, and is different from the lead 5 of the present embodiment, which is a power supply lead wire, a jumper wire 53, or a neutral wire.
In the present embodiment, the 1 st slit 31 for holding the winding 4 and the 2 nd slit 32 for holding the lead 5 are formed in the terminal 3, and the winding 4 and the lead 5 can be held together by one terminal 3. This eliminates the need for lead terminals, and thus reduces the number of components and the cost.
In the present embodiment, the lead 5 in which the stranded wire having the plurality of conductive wires 51 is collectively covered with the insulating coating 52 is used, and thus a plurality of wires constituting the lead 5 can be collectively wired, so that handling of the lead 5 becomes easy.
In the present embodiment, when the terminal 3 is inserted into the 1 st cavity 24, the insulating coating 52 of the lead 5 is cut off by the inner wall of the 2 nd slit 32, and only the portion of the lead 5 held in the 2 nd slit 32 is peeled off and the lead 51 is electrically connected to the terminal 3. Thus, the portion of the lead 5 held in the 2 nd slit 32 is covered with the insulating coating 52, and the bundled state of the lead 5 can be maintained.
In the present embodiment, since the jumper wire 53 is disposed on the non-connection side 50, the space on the connection side 40 can be reduced, and the motor 100 can be downsized. Since the jumper wire 53 is disposed on the non-connection side 50, the number of lead wires 5 connecting the coils 43 to each other on the connection side 40 can be reduced.
In the present embodiment, the linear expansion coefficient of the resin mold 6 is set to a relationship of 0.8 in the linear expansion coefficient of the terminal 3 < 1.2 in the linear expansion coefficient of the terminal 3, so that the difference in the linear expansion coefficients of the resin mold 6 and the terminal 3 can be reduced. Further, the linear expansion coefficient of the resin mold 6 is set to a relationship of 0.8 in which the linear expansion coefficient of the insulator 2 is × < 0.8 in which the linear expansion coefficient of the resin mold 6 is < 1.2 in which the insulator 2 is linear, whereby the difference in the linear expansion coefficients of the resin mold 6 and the insulator 2 can be reduced. Therefore, even when a temperature change occurs, it is possible to suppress the occurrence of a difference in thermal expansion between the resin mold 6 and the terminal 3 and between the resin mold 6 and the insulator 2, and to stabilize the pressure-bonded state of the coil 4 and the lead 5.
Fig. 7 is a view of the insulator 2 of the stator 10 according to embodiment 2 of the present invention as viewed in the axial direction. In embodiment 2, the same reference numerals are given to the same portions as those in embodiment 1, and the description thereof is omitted.
A line along a radial direction passing through the center of the insulator 2 in the circumferential direction is defined as a center line L. The insulator 2 according to embodiment 2 is formed substantially line-symmetrically with respect to the center line L. The 1 st cavity 24 is disposed in the insulator 2 at the center in the circumferential direction. In the present embodiment, the 1 st cavity 24 is disposed in the center portion of the insulator 2, and therefore the thickness of the wall surrounding the 1 st cavity 24 is substantially equal across the center line L, and therefore the pressure applied to the terminal 3 can be substantially equalized. This prevents disconnection when the winding 4 and the lead 5 are pressed against the terminal 3. In the present embodiment, the winding 4 is disposed on the left side of the sheet of fig. 7, and the lead 5 is disposed on the right side of the sheet of fig. 7, but the winding 4 and the lead 5 may be disposed in the opposite left-right direction. The insulator 2 may be formed to be completely line-symmetrical with respect to the center line L.
Fig. 8 is a side view showing the insulator 2 of the stator 10 according to embodiment 3 of the present invention. In embodiment 3, the same reference numerals are given to the same portions as those in embodiment 1, and the description thereof is omitted.
The height of the inner peripheral wall 22 of the insulator 2 in the axial direction is equal to the height of the outer peripheral wall 21 in the axial direction. One end surface 22a of the inner peripheral wall 22 in the axial direction and one end surface 21a of the outer peripheral wall 21 in the axial direction are located on the same plane orthogonal to the axial direction. In the present embodiment, the one end surface 22a of the inner peripheral wall 22 in the axial direction and the one end surface 21a of the outer peripheral wall 21 in the axial direction are located on the same plane in the axial direction, whereby the lead 5 can be stably arranged between the inner peripheral wall 22 and the outer peripheral wall 21. Therefore, the pressure-bonded state of the lead 5 to the terminal 3 can be stabilized.
Fig. 9 is a perspective view showing the insulator 2 of the stator 10 according to embodiment 4 of the present invention. In embodiment 4, the same reference numerals are given to the same portions as those in embodiment 1, and the description thereof is omitted.
A lower wall portion 27 lower than other portions in the insertion direction of the terminal 3 is formed in a part of the outer peripheral wall 21 surrounding the 1 st cavity 24. The low wall portion 27 is a wall located between the 2 nd cavity 25 and the 3 rd cavity 26 on the radially outer side than the 1 st cavity 24. By making the height of a part of the wall surrounding the 1 st cavity 24 lower than the height of the other part, stress applied from the wall surrounding the 1 st cavity 24 to the terminal, not shown, can be reduced, and excessive stress applied to the winding and the lead, not shown, can be prevented. In addition, thermal stress generated by a difference in thermal expansion coefficient between the insulator 2 and the terminal 3 at high temperature can be reduced. The position of the low wall portion 27 is not limited to the position shown in fig. 9 as long as it is a part of the wall surrounding the 1 st cavity 24.
Fig. 10 is a front view showing the terminal 3 of the stator 10 according to embodiment 5 of the present invention. In embodiment 5, the same reference numerals are given to the same portions as those in embodiment 1, and the description thereof is omitted. In fig. 10, the insulating coatings 42 and 52 are shown in a broken line for convenience of explanation.
The terminal 3 according to embodiment 5 is formed with 1 st slit 31 and 2 nd slits 32. As described above, since the 1 winding 4 and the 2 leads 5 can be collectively conducted, the number of terminals 3 can be reduced to reduce the cost.
The configuration described in the above embodiment is an example of the content of the present invention, and may be combined with other known techniques, and a part of the configuration may be omitted or modified without departing from the scope of the present invention.
In the embodiments, the case where the present invention is applied to a rotary motor is exemplified, but the present invention can be applied to a linear motor, for example.
Description of the reference numerals
1 stator core, 2 insulators, 3 terminals, 4 windings, 5 leads, 6 resin molded parts, 10 stators, 10a ends, 10b ends, 11 core holders, 12 teeth, 20 rotors, 21 outer peripheral walls, 21a end surfaces, 22 inner peripheral walls, 22a end surfaces, 23 connecting parts, 24 st cavity, 25 nd cavity, 2 nd cavity, 26 rd cavity, 3 rd cavity, 27 low wall parts, 30 frames, 31 st slot, 32 nd slot, 2 nd slot, 33 bulge, 34 side walls, 35 bottom walls, 40 wiring sides, 41 core wires, 42 insulating coating parts, 43 coils, 50 wiring opposite sides, 51 leads, 52 insulating coating parts, 53 jumpers, 100 motors, C center shafts and L center lines.
Claims (5)
1. A stator having a core print and a plurality of teeth projecting from the core print,
the stator is characterized by comprising:
an insulator covering the teeth;
a winding which is an insulated conductor in which a conductive core wire is covered with an insulating coating;
a power supply lead wire which is an insulated conductor in which conductive strands are collectively covered with an insulating coating portion;
a jumper wire which is an insulated conductor in which conductive stranded wires are collectively covered with an insulating coating portion;
a conductive connection terminal fixed to the insulator to conduct the winding and the power supply lead-out wire; and
a resin molding part encapsulating the insulator,
a 1 st slit for holding the winding and a 2 nd slit for holding the power supply lead wire are formed in the terminal,
the width of the 1 st slit is formed smaller than the outer diameter of a portion of the winding covered by the insulating coating,
the width of the 2 nd slit is formed smaller than the outer diameter of a portion of the power supply lead wire covered by the insulating coating portion,
the portion of the winding held in the 1 st slit is formed by peeling off the insulating coating portion to electrically connect the core wire and the terminal,
the part of the power supply lead wire held in the 2 nd slit is electrically connected to the twisted wire and the terminal by peeling off the insulating coating portion,
the insulating coating portion remains except for a portion held in the 2 nd slit among the power supply lead wires,
the resin mold part encapsulates the connection terminal,
the coefficient of linear expansion of the resin molded portion is set to a relationship of 0.8 < 1.2,
a plurality of insulators are arranged along the circumferential direction of the stator,
a plurality of coils are formed by winding the winding around the insulator,
the jumper connecting one of the coils with the other of the coils,
the terminal is disposed at one end of the stator in the axial direction,
the jumper wire is disposed on the opposite side of the terminal in the axial direction of the stator.
2. The stator according to claim 1,
a cavity into which the terminal is inserted is formed in the insulator,
the cavity is disposed in a central portion of the insulator along a circumferential direction of the stator.
3. The stator according to claim 2,
the insulator has: an outer peripheral wall forming the cavity; an inner peripheral wall disposed radially inward of the outer peripheral wall; and a connection portion that connects the outer peripheral wall and the inner peripheral wall and allows the winding to be wound,
the height of the inner circumferential wall is equal to the height of the outer circumferential wall.
4. The stator according to claim 3,
the height of a part of the wall surrounding the cavity is lower than the height of the other part of the outer peripheral wall.
5. An electric motor, comprising:
the stator of any one of claims 1 to 4; and
and a rotor disposed with a gap from the stator.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2019/013430 WO2020194619A1 (en) | 2019-03-27 | 2019-03-27 | Stator and electric motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113615047A CN113615047A (en) | 2021-11-05 |
| CN113615047B true CN113615047B (en) | 2022-05-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201980094368.XA Active CN113615047B (en) | 2019-03-27 | 2019-03-27 | Stator and motor |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP6727457B1 (en) |
| CN (1) | CN113615047B (en) |
| DE (1) | DE112019006919B4 (en) |
| TW (1) | TWI735185B (en) |
| WO (1) | WO2020194619A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102020131418A1 (en) | 2020-11-26 | 2022-06-02 | Nidec Motors & Actuators (Germany) Gmbh | Stator with wire lead insulator |
| CN113949238A (en) * | 2021-10-22 | 2022-01-18 | 珠海凯邦电机制造有限公司 | Winding method of stator, stator and motor thereof |
| CN114498998A (en) * | 2022-01-04 | 2022-05-13 | 广东美的智能科技有限公司 | Wiring structure, motor stator and servo motor |
| WO2023218044A2 (en) | 2022-05-13 | 2023-11-16 | Hofer Powertrain Innovation Gmbh | Stator for an electrical machine comprising a compressed strand winding head, corresponding electrical machine, and manufacturing method for a stator |
| EP4295471A1 (en) | 2022-05-13 | 2023-12-27 | hofer powertrain innovation GmbH | Method for manufacturing a conductor segment for a winding and for manufacturing a stator for an electric machine having a hybrid winding design |
| DE102022005023A1 (en) | 2022-05-13 | 2023-11-30 | Hofer Powertrain Innovation Gmbh | Method for producing a line segment for a winding and a stator for an electric machine with a hybrid winding design |
| DE102022112127A1 (en) | 2022-05-13 | 2023-11-16 | Hofer Powertrain Innovation Gmbh | Stator for an electric machine with a hybrid winding design |
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| DE102022112126A1 (en) | 2022-05-13 | 2023-11-16 | Hofer Powertrain Innovation Gmbh | Line segment for a winding of an electrical machine and a manufacturing method for a line segment |
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Also Published As
| Publication number | Publication date |
|---|---|
| TWI735185B (en) | 2021-08-01 |
| DE112019006919T5 (en) | 2021-11-11 |
| JP6727457B1 (en) | 2020-07-22 |
| JPWO2020194619A1 (en) | 2021-04-08 |
| TW202037037A (en) | 2020-10-01 |
| WO2020194619A1 (en) | 2020-10-01 |
| DE112019006919B4 (en) | 2022-06-30 |
| CN113615047A (en) | 2021-11-05 |
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