CN212588155U - Motor and motor unit - Google Patents
Motor and motor unit Download PDFInfo
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- CN212588155U CN212588155U CN202020584154.0U CN202020584154U CN212588155U CN 212588155 U CN212588155 U CN 212588155U CN 202020584154 U CN202020584154 U CN 202020584154U CN 212588155 U CN212588155 U CN 212588155U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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Abstract
The utility model provides a motor and motor unit. One mode of the motor of the present invention has a rotor and a stator surrounding the rotor from the radial outside. The teeth of the stator have: a tooth body extending in a radial direction; and an umbrella part located at the radial inner end of the tooth main body. The size of the gap between adjacent umbrella parts along the circumferential direction is more than 2 times of the wire diameter of the coil wire. The wedge member has: a body piece extending in a circumferential direction; and a pair of side pieces extending from both circumferential side ends of the main body piece toward a radially outer side along the side face of the tooth main body. The main body piece closes a gap between the circumferentially adjacent umbrella parts, and corners of the main body piece and the side piece are sharply bent.
Description
Technical Field
The utility model relates to a motor and motor unit.
Background
In recent years, development of motors mounted on hybrid vehicles and electric vehicles has been widely performed. Patent document 1 describes a construction method called a cassette (case) method in which a coil wound in advance is moved in a radial direction and attached to a tooth.
Patent document 1: international publication No. 2018/092552
An umbrella portion may be provided at the tip of the tooth portion. The umbrella portion also functions to suppress detachment of the coil from the slot. In this respect, it is preferable that the gap between adjacent umbrella parts is narrow. On the other hand, in the case of the cartridge system, if the gap between the adjacent umbrella parts is too narrow, the work time of the coil mounting step for mounting the coil becomes long.
SUMMERY OF THE UTILITY MODEL
In view of the above problems, an object of one aspect of the present invention is to provide a motor capable of shortening a coil mounting process for mounting a coil.
An object of one aspect of the present invention is to provide a motor having a function of suppressing coil detachment and suppressing a time lag of a coil mounting process.
A first aspect of the present invention provides a motor, having: a rotor rotatable about a central axis; and a stator surrounding the rotor from a radially outer side. The stator has: a stator core having an annular core back portion centered on a central axis and a plurality of teeth portions extending radially inward from the core back portion and arranged in a circumferential direction; a coil formed of a coil wire and attached to the tooth portion; and a wedge member located radially inside the coil in a slot between the circumferentially adjacent teeth. The tooth portion has: a tooth body extending in a radial direction; and an umbrella part located at the radial inner end of the tooth main body. The size of the gap between the adjacent umbrella parts along the circumferential direction is more than 2 times of the wire diameter of the coil wire. The wedge member has: a body piece extending in a circumferential direction; and a pair of side pieces extending from both circumferential side ends of the main body piece toward a radially outer side along the side surfaces of the tooth main body. The main body piece closes a gap between the umbrella parts adjacent in the circumferential direction, and corners of the main body piece and the side piece are sharply bent.
According to a second aspect of the present invention, in the motor of the first aspect, the corner portion has a radius of curvature of 9mm or less as viewed in the axial direction.
According to a third aspect of the present invention, in the motor of the first aspect, the gap size between the adjacent umbrella parts in the circumferential direction is 3 times or less the wire diameter of the coil wire.
According to a fourth aspect of the present invention, in the motor of the second aspect, the gap between the adjacent umbrella portions in the circumferential direction is 3 times or less the wire diameter of the coil wire.
According to a fifth aspect of the present invention, in the motor of the first aspect, the umbrella portion has a protruding portion that protrudes in the circumferential direction with respect to a side surface of the tooth main body facing the circumferential direction, and a protruding dimension of the protruding portion is larger than a half of a wire diameter of the coil wire.
According to a sixth aspect of the present invention, in the motor of the second aspect, the umbrella portion has a protruding portion that protrudes in the circumferential direction with respect to a side surface of the tooth main body facing the circumferential direction, and a protruding dimension of the protruding portion is larger than a half of a wire diameter of the coil wire.
According to a seventh aspect of the present invention, in the motor of the third aspect, the umbrella portion has a protruding portion that protrudes in the circumferential direction with respect to a side surface of the tooth main body facing the circumferential direction, and a protruding dimension of the protruding portion is larger than a half of a wire diameter of the coil wire.
According to an eighth aspect of the present invention, in the motor of the fourth aspect, the umbrella portion has a protruding portion that protrudes in the circumferential direction with respect to a side surface of the tooth main body facing the circumferential direction, and a protruding dimension of the protruding portion is larger than a half of a wire diameter of the coil wire.
According to a ninth aspect of the present invention, in the motor according to any one of the first to eighth aspects, the umbrella portion has a protruding portion that protrudes in a circumferential direction with respect to a side surface of the tooth main body facing in the circumferential direction, and an angle formed by a surface of the protruding portion facing radially outward and the side surface of the tooth main body is 111 ° or less.
The tenth aspect of the present invention provides a motor unit, which has: the motor according to any one of the first to ninth aspects; a transmission mechanism that transmits power of the motor; an inverter unit that supplies power to the motor; and a housing that houses the motor and the transmission mechanism.
According to the utility model discloses, provide the motor that can shorten the coil installation process of installation coil.
According to the utility model discloses, provide and have the function that the suppression coil breaks away from and the motor of the time extension of suppression coil installation process.
Drawings
Fig. 1 is a conceptual diagram of a motor unit according to an embodiment.
Fig. 2 is a sectional view of a motor according to an embodiment.
Fig. 3 is a partial cross-sectional view of an embodiment of a stator.
Fig. 4 is a schematic diagram showing a winding structure of a coil according to an embodiment.
Fig. 5 is a schematic view showing one step of the method for manufacturing a stator according to one embodiment.
Description of the reference symbols
9: a motor; 31: a rotor; 32: a stator; 33: a stator core; 33 a: the back of the iron core; 33 b: a tooth portion; 33 c: a tooth body; 33 ca: a side surface; 33 d: an umbrella part; 33 e: a protrusion; 34: a coil; 34 a: a coil wire; 36: a wedge member; 36 a: a body sheet; 36 b: a side panel; 36 c: a corner portion; 39: a slot; d: size; h: a protrusion size; j1: motor axis (central axis); p: the diameter of the wire; r: a radius of curvature; θ: and (4) an angle.
Detailed Description
Hereinafter, a motor and a motor unit according to an embodiment of the present invention will be described with reference to the drawings. The scope of the present invention is not limited to the following embodiments, and can be arbitrarily changed within the scope of the technical idea of the present invention. In the drawings below, in order to facilitate understanding of each structure, the actual structure may be different from the scale, the number, or the like of each structure.
In the following description, the vertical direction is defined based on the positional relationship in the case where the motor unit 10 of the present embodiment shown in each drawing is mounted on a vehicle on a horizontal road surface, and the description is given. In the drawings, a Y axis extending in the left-right direction of the vehicle (vehicle width direction) is shown as appropriate.
Fig. 1 is a conceptual diagram of a motor unit 10 according to an embodiment. The motor axis (central axis) J1, the sub axis J3, and the output axis J4, which will be described later, are virtual axes that do not actually exist.
The motor unit 10 is mounted on a vehicle, and drives the vehicle by rotating wheels. The motor unit 10 is mounted on, for example, an Electric Vehicle (EV). The motor unit 10 may be mounted on a vehicle having a motor as a power source, such as a Hybrid Electric Vehicle (HEV) or a plug-in hybrid electric vehicle (PHV).
As shown in fig. 1, the motor unit 10 includes a motor 9, a transmission mechanism 5 (transaxle), an inverter unit 8, and a housing 6.
The inverter unit 8 is fixed to an outer side surface of the case 6 at an inverter case 8 b. The inverter unit 8 has an inverter 8a and an inverter case 8b that houses the inverter 8 a. Although not shown, the inverter unit 8 further includes a circuit board and a capacitor.
The inverter 8a is connected to the motor 9 via a bus bar (not shown). The inverter 8a supplies an alternating current to the motor 9 via the bus bar. Thereby, the inverter unit 8 supplies electric power to the motor 9.
The transmission mechanism 5 transmits the power of the motor 9 and outputs it from the output shaft 55. The transmission mechanism 5 incorporates a plurality of mechanisms that are responsible for power transmission between the drive source and the driven device.
The transmission mechanism 5 includes a motor drive shaft 11, a motor drive gear 21, a counter shaft 13, a pinion gear (large gear portion) 23, a drive gear (small gear portion) 24, a ring gear 51, an output shaft (axle) 55, and a differential device (differential gear) 50.
The motor drive shaft 11 extends along a motor axis J1. The motor 9 rotates a motor drive shaft 11. A motor drive gear 21 is fixed to the motor drive shaft 11. The motor drive gear 21 meshes with the pinion gear 23.
The pinion 23 extends along a pinion axis J3 and is fixed to the countershaft 13. A drive gear 24 is fixed to the counter shaft 13 in addition to the pinion gear 23. The drive gear 24 meshes with the ring gear 51.
The ring gear 51 is fixed to the differential device 50. The ring gear 51 rotates about the output axis J4. The ring gear 51 transmits the power of the motor 9 transmitted via the drive gear 24 to the differential device 50.
The differential device 50 is a device for transmitting the torque output from the motor 9 to the wheels of the vehicle. The differential device 50 is connected to a pair of output shafts 55. Wheels are mounted on the pair of output shafts 55, respectively. The differential device 50 has the following functions: the speed difference of the left and right wheels is absorbed when the vehicle turns, and the same torque is transmitted to the pair of output shafts 55.
The housing 6 houses the motor 9 and the transmission mechanism 5. The housing 6 is made of, for example, an aluminum alloy, and is manufactured by die casting. A motor chamber a1 that houses the motor 9 and a gear chamber a2 that houses the transmission mechanism 5 are provided inside the housing 6. Oil O is accumulated in the casing. The oil O is used for lubricating the transmission mechanism 5 and for cooling the motor 9.
The motor 9 is a motor generator having both a function as an electric motor and a function as a generator. The motor 9 mainly functions as an electric motor to drive the vehicle, and functions as a generator during regeneration. The motor 9 is an inner rotor type motor.
The motor 9 has a rotor 31 and a stator 32 surrounding the rotor 31 from the radially outer side of a motor axis (central axis) J1.
In the following description, the radial direction around the motor axis J1 will be simply referred to as the "radial direction", and the circumferential direction around the motor axis J1, that is, the direction around the motor axis J1 will be simply referred to as the "circumferential direction".
The rotor 31 is rotatable about a motor axis J1 extending in the horizontal direction. The rotor 31 is rotated by supplying electric power to the stator 32 from a battery, not shown. The rotor 31 is connected to the motor drive shaft 11 of the transmission mechanism 5, and rotates the motor drive shaft 11. Thereby, the torque of the rotor 31 is transmitted to the transmission mechanism 5.
Fig. 2 is a sectional view of the motor 9. In fig. 2, a coil wire 34a constituting the coil 34 is shown in a simplified manner.
The rotor core 31a is formed by laminating electromagnetic steel plates. The rotor core 31a is a cylindrical body extending in the axial direction. Rotor core 31a is provided with a holding hole 31aa into which rotor magnet 31b is inserted and fixed.
The stator 32 includes a stator core 33, a coil 34 formed of a coil wire 34a (omitted in fig. 2), a plurality of insulating papers 35, and a plurality of wedge members 36.
The stator core 33 is formed of a plurality of electromagnetic steel plates stacked in the axial direction. The stator core 33 includes: an annular core back 33a centered on the motor axis J1; and a plurality of tooth portions 33b extending from the core back portion 33a toward the radially inner side.
The plurality of teeth 33b are arranged at equal intervals in the circumferential direction. The coil 34 is attached to the tooth 33 b. The slots 39 are provided between the circumferentially adjacent teeth 33 b. The slot 39 is open radially inward at an open end 39 a. The coil 34 is accommodated in the slot 39 except for the coil end. The axially extending portions of the coil wires 34a pass through the insertion slots 39. In addition, one insulating paper 35 and one wedge member are disposed in each of the slots 39.
In the present embodiment, the stator core 33 has 48 teeth 33 b. That is, the stator 32 of the present embodiment has 48 slots. The number of slots of stator 32 is set as appropriate according to the number of poles of rotor magnet 31b and the winding method of coil 34.
Fig. 3 is a partial sectional view of the stator 32.
The tooth portion 33b has: a tooth main body 33c extending in the radial direction; and an umbrella portion 33d located at the radially inner end of the tooth main body 33 c.
The tooth main body 33c extends with a uniform width in the radial direction. The tooth main body 33c has a pair of side surfaces 33ca facing both sides in the circumferential direction. The umbrella portion 33d is wider in width in the circumferential direction than the tooth main body 33 c. The radially inward surface of the umbrella portion 33d is arcuate with the motor axis J1 as the center when viewed axially.
The umbrella portion 33d has a pair of protruding portions 33e located on both sides in the circumferential direction. The protruding portion 33e protrudes in the circumferential direction with respect to the side surface 33ca of the tooth main body 33 c. The protruding portions 33e of a pair of circumferentially adjacent teeth 33b are circumferentially opposed to each other across the open end 39a of the slot 39. Therefore, the pair of circumferentially adjacent protrusions 33e narrows the open end 39a of the insertion groove 39.
The protruding portion 33e has a holding surface 33ea facing radially outward. The holding surface 33ea is a surface connected to the side surface 33ca of the tooth main body 33 c. The holding surface 33ea is a surface on which the wedge member 36 in the slot 39 is hooked and held.
In the present embodiment, the dimension d of the open end 39a of the slot 39 along the circumferential direction is 2 times or more the wire diameter p of the coil wire 34 a. By setting the dimension d of the opening end 39a to be 2 times or more the wire diameter p, as will be described later, the time required for the coil mounting step of mounting the coil 34 to the tooth portion 33b can be shortened. The dimension d of the open end 39a in the circumferential direction is a gap dimension d between the umbrella parts 33d adjacent in the circumferential direction.
The insulating paper 35 is provided to ensure insulation between the coil wire 34a and the stator core 33. The insulating paper 35 is disposed between the coil 34 and the stator core 33 in the slot 39. In the coil mounting step of mounting the coil 34 to the tooth portion 33b, the insulating paper 35 is disposed in the slot 39 in advance before the coil 34 is inserted into the slot 39.
The insulating paper 35 extends in the axial direction with a uniform sectional shape. The insulating paper 35 includes a1 st piece 35a extending in the circumferential direction and a pair of 2 nd pieces 35b extending radially inward from both circumferential ends of the 1 st piece 35 a. The 1 st piece 35a and the pair of 2 nd pieces 35b are bent so that the insulating paper 35 is along the inner side surfaces of the insertion groove 39. The 1 st piece 35a extends along the radially inward surface of the core back 33a in the slot 39. The 2 nd piece 35b extends along the side face 33ca of the tooth main body 33c within the insertion groove 39. The pair of 2 nd pieces 35b are circumferentially opposed to each other.
The wedge members 36 are located radially inwardly of the coils 34 within the slots 39. The wedge member 36 suppresses the coil wire 34a from flying radially inward from the insertion groove 39. The wedge member 36 is held in the insertion groove 39 by hooking the protrusion 33 e. In the coil mounting step of mounting the coil 34 to the tooth portion 33b, the wedge member 36 is inserted in the axial direction after the coil 34 is inserted into the slot 39.
The wedge members 36 extend in the axial direction with a uniform cross-sectional shape. The wedge member 36 includes a main body piece 36a extending in the circumferential direction and a pair of side pieces 36b extending radially outward from both circumferential ends of the main body piece 36 a.
The body piece 36a closes the gap between the circumferentially adjacent umbrella portions 33 d. That is, the body piece 36a closes the open end 39a of the insertion groove 39. Both circumferential end portions of the body piece 36a extend along the holding surface 33ea on the radially outer side of the protruding portion 33 e.
The side piece 36b extends along the side face 33ca of the tooth main body 33 c. The pair of side sheets 36b are circumferentially opposed to each other. The side sheet 36b overlaps the 2 nd sheet 35b of the insulating paper 35. That is, the radially inner end of the 2 nd piece 35b of the insulating paper 35 is sandwiched between the side piece 36b and the tooth main body 33 c.
A corner portion 36c is provided at the boundary between the main body piece 36a and the side piece 36 b. That is, the wedge member 36 is provided with a pair of corner portions 36 c. The corner portion 36c extends linearly in the axial direction. The corner 36c is located radially outward of the projection 33 e. The corner 36c of the present embodiment is sharply bent. The wedge member of the present embodiment is formed into a bent shape by a die, not by bending a sheet formed into a flat shape.
Next, a winding structure of the coil 34 according to the present embodiment will be described with reference to fig. 4.
As shown in fig. 4, the plurality of coils 34 are classified into coils corresponding to U-phase, V-phase, and W-phase. The coils 34 of each phase are provided in 4 numbers. Each coil 34 includes an inner coil 34A and an outer coil 34B wound outside the inner coil 34A. One coil 34 is constituted by one coil wire 34 a. That is, the inner coil 34A and the outer coil 34B are connected to each other by one coil wire 34A.
The inner coil 34A spans 5 teeth 33 b. That is, the inner coil 34A is a distributed winding. The outer coil 34B extends over 7 tooth portions 33B including 5 tooth portions 33B around which the inner coil 34A is wound. That is, the outer coil 34B is a distributed winding. The slot 39 through which the outer coil 34B passes is adjacent to the slot 39 through which the inner coil 34A passes. 5 teeth are arranged between the outer coils 34B of the coils 34 adjacent in the circumferential direction.
According to the present embodiment, the coil 34 is formed as a double winding of the inner coil 34A and the outer coil 34B. The inner coil 34A functions as one coil surrounding the 5 teeth 33 b. On the other hand, the outer coil 34B functions as one flexible coil (dummy coil 34V) positioned between the two inner coils 34A. The dummy coil 34V is composed of a coil wire 34a on one circumferential side of one outer coil 34B and a coil wire 34a on the other circumferential side of the other outer coil 34B positioned on one circumferential side of the outer coil 34B.
In fig. 4, a virtual coil 34V formed by two adjacent outer coils 34B is shown by a broken line only in the U-phase configuration.
In the coil mounting step of the cartridge method, the inner coil 34A and the outer coil 34B can be inserted simultaneously. Therefore, according to the present embodiment, the mounting of the coil 34 is completed by 4 coil insertions in each phase.
On the other hand, in the case where the coil corresponding to the inner coil 34A and the coil corresponding to the dummy coil 34V are provided separately, these coils need to be inserted separately. Therefore, in this case, 8 coil insertions are required.
That is, according to the present embodiment, the number of times the coil 34 is inserted into the slot 39 can be reduced, and the coil mounting process can be shortened.
Fig. 5 is a schematic view showing a coil mounting process for mounting the coil 34 to the tooth portion 33b in the method for manufacturing the stator 32 according to the present embodiment. The coil mounting step of the present embodiment is a construction method called a cartridge method in which the coil 34 wound in advance is inserted in the radial direction from the open end 39a of the slot 39. The coil mounting process of the present embodiment is performed using the coil mounting device 4.
The coil attachment device 4 is disposed radially inward of the stator core 33 in a state of holding the coil wire 34a wound in advance in the winding process. In the winding process, the coil wire 34a is wound on 1 winding drum for 2 turns. Therefore, in a state where the coils 34 are formed, the coil lines 34a are arranged in two rows. In addition, the coils 34 are held by the coil attachment device 4 in a state where the coil wires 34a are arranged in two rows in the circumferential direction and in a plurality of rows in the radial direction. In a state where the coil wires 34a are arranged in two rows in the circumferential direction, the coil 34 is inserted into the slot 39 from the open end 39a by the coil attachment device 4. After the coil 34 is inserted into the insertion groove 39, the wedge member 36 is axially inserted into the insertion groove 39.
According to the present embodiment, the coil mounting device 4 inserts the coil wires 34a into the slot 39 in two rows. Therefore, in the coil mounting step, the crossing of the coil wires 34a in the slot 39 can be suppressed, and the occupation ratio of the coil wires 34a in the slot 39 can be increased.
Next, the operation and effect of the stator 32 according to the present embodiment will be described with reference to fig. 3.
According to the present embodiment, the gap dimension d between the umbrella parts 33d adjacent in the circumferential direction is 2 times or more the wire diameter p of the coil wire 34 a. The coil wires 34a arranged in 2 rows can be inserted into the slots 39 from the gaps between the umbrella parts 33d adjacent in the circumferential direction, and the coil mounting process can be shortened.
According to the present embodiment, the corner portion 36c of the wedge member 36 is sharply bent. The conventional wedge member is in a flat sheet shape, and is bent to follow the shape of the slot by being inserted into the slot. In contrast, since the wedge member 36 of the present embodiment has the corner 36c in advance, the wedge member is hooked to the umbrella portion 33d at the corner 36 c. Therefore, as in the present embodiment, even when the gap dimension d is secured to be large in order to shorten the coil mounting process, the wedge member 36 is likely to stay in the slot 39, and the coil 34 can be prevented from flying radially inward from the slot 39.
In the present embodiment, the radius of curvature R of the corner portion 36c as viewed from the axial direction is preferably 9mm or less. When the radius of curvature R of the corner portion 36c is 9mm or less, the corner portion 36c is easily hooked on the umbrella portion 33d, and the wedge member 36 is more easily retained in the insertion groove 39.
In the present specification, the radius of curvature R of the corner portion 36c refers to the radius of curvature of the outer side of the corner portion 36 c. That is, the radius of curvature R of the corner portion 36c is the radius of curvature of the portion where the surface of the main body sheet 36a facing the umbrella portion 33d and the surface of the side sheet 36b facing the tooth main body 33c are continuous.
In the present embodiment, the gap dimension d between the umbrella parts 33d adjacent in the circumferential direction is preferably 3 times or less the wire diameter p of the coil wire 34 a. If the gap dimension d exceeds 3 times the wire diameter p, the open end 39a of the slot 39 becomes too wide, and the coil wire 34a is likely to fly out of the slot 39 together with the wedge member 36. By setting the gap dimension d to 3 times or less the wire diameter p, the wedge member 36 and the coil wire 34a are easily retained in the slot 39.
In the present embodiment, the protruding dimension h of the protruding portion 33e is preferably larger than half the wire diameter p of the coil wire 34 a. When the coil wire 34a in the slot 39 approaches the open end 39a, the wedge member 36 is sandwiched between the coil wire 34a and the holding surface 33ea of the protrusion 33e by making the protrusion dimension h larger than half the wire diameter p. Thereby, the wedge member 36 is held in the insertion groove 39, and the wedge member 36 is easily retained in the insertion groove 39.
The projection dimension h of the projection 33e is a distance dimension from the side surface 33ca to the tip end position of the projection 33e in the normal direction of the side surface 33ca of the tooth main body 33 c.
In the present embodiment, the angle θ formed by the holding surface 33ea of the protruding portion 33e and the side surface 33ca of the tooth main body 33c is preferably 111 ° or less. By setting the angle θ to 111 ° or less, the reliability of the holding of the wedge member 36 on the holding surface 33ea can be improved.
The angle θ is preferably 100 ° or more. By making the angle θ close to 90 °, the wedge member 36 is easily held on the holding surface 33 ea. However, if the angle θ is too close to 90 °, punching of the electromagnetic steel plates constituting the stator core 33 becomes difficult. By setting the angle θ to 100 ° or more, the stator core 33 can be easily manufactured.
While the embodiments of the present invention have been described above, the combination of the respective components in the embodiments is an example, and addition, omission, replacement, and other changes in the components can be made without departing from the scope of the present invention. In addition, the present invention is not limited by the embodiments.
Claims (10)
1. A motor is characterized in that a motor is provided,
the motor has:
a rotor rotatable about a central axis; and
a stator surrounding the rotor from a radially outer side,
the stator has:
a stator core having an annular core back portion centered on a central axis and a plurality of teeth portions extending radially inward from the core back portion and arranged in a circumferential direction;
a coil formed of a coil wire and attached to the tooth portion; and
a wedge member located radially inside the coil in a slot between the circumferentially adjacent teeth,
the tooth portion has:
a tooth body extending in a radial direction; and
an umbrella part located at the radial inner end of the tooth main body,
the size of the gap between the adjacent umbrella parts along the circumferential direction is more than 2 times of the wire diameter of the coil wire,
the wedge member has:
a body piece extending in a circumferential direction; and
a pair of side pieces extending from both circumferential side ends of the main body piece toward a radially outer side along side surfaces of the tooth main body,
the main body piece closes a gap between the circumferentially adjacent umbrella parts,
corners of the main body panel and the side panels are sharply bent.
2. The motor of claim 1,
the corner has a radius of curvature of 9mm or less when viewed from the axial direction.
3. The motor of claim 1,
the size of the gap between the umbrella parts adjacent in the circumferential direction is less than or equal to 3 times of the wire diameter of the coil wire.
4. The motor of claim 2,
the size of the gap between the umbrella parts adjacent in the circumferential direction is less than or equal to 3 times of the wire diameter of the coil wire.
5. The motor of claim 1,
the umbrella part has a protruding part protruding in the circumferential direction with respect to a side surface of the tooth main body facing in the circumferential direction,
the protruding dimension of the protruding portion is larger than a half of the wire diameter of the coil wire.
6. The motor of claim 2,
the umbrella part has a protruding part protruding in the circumferential direction with respect to a side surface of the tooth main body facing in the circumferential direction,
the protruding dimension of the protruding portion is larger than a half of the wire diameter of the coil wire.
7. The motor of claim 3,
the umbrella part has a protruding part protruding in the circumferential direction with respect to a side surface of the tooth main body facing in the circumferential direction,
the protruding dimension of the protruding portion is larger than a half of the wire diameter of the coil wire.
8. The motor of claim 4,
the umbrella part has a protruding part protruding in the circumferential direction with respect to a side surface of the tooth main body facing in the circumferential direction,
the protruding dimension of the protruding portion is larger than a half of the wire diameter of the coil wire.
9. The motor according to any one of claims 5 to 8,
an angle formed by a surface of the protruding portion facing radially outward and the side surface of the tooth main body is 111 ° or less.
10. A motor unit is characterized in that,
the motor unit includes:
the motor of any one of claims 1 to 9;
a transmission mechanism that transmits power of the motor;
an inverter unit that supplies power to the motor; and
a housing that houses the motor and the transmission mechanism.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019080432A JP7306040B2 (en) | 2019-04-19 | 2019-04-19 | motor |
| JP2019-080432 | 2019-04-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212588155U true CN212588155U (en) | 2021-02-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020584154.0U Active CN212588155U (en) | 2019-04-19 | 2020-04-17 | Motor and motor unit |
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| JP (1) | JP7306040B2 (en) |
| CN (1) | CN212588155U (en) |
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| WO2023127348A1 (en) * | 2021-12-27 | 2023-07-06 | ニデック株式会社 | Stator core, stator, method for manufacturing stator core, and method for manufacturing stator |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4780636A (en) * | 1987-02-27 | 1988-10-25 | General Electric Company | Lip structure for a stator in a dynamo-electric machine |
| DE112016000898T5 (en) | 2015-02-25 | 2017-11-16 | Mitsubishi Electric Corporation | Anchor and electric rotary machine |
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2019
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| Publication number | Publication date |
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| JP7306040B2 (en) | 2023-07-11 |
| JP2020178489A (en) | 2020-10-29 |
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