CN216751354U - Motor, motor stator and double-layer composite magnetic slot wedge thereof - Google Patents
Motor, motor stator and double-layer composite magnetic slot wedge thereof Download PDFInfo
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- CN216751354U CN216751354U CN202123375691.8U CN202123375691U CN216751354U CN 216751354 U CN216751354 U CN 216751354U CN 202123375691 U CN202123375691 U CN 202123375691U CN 216751354 U CN216751354 U CN 216751354U
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Abstract
The utility model provides a motor, a motor stator and a double-layer composite magnetic slot wedge thereof, which comprise a magnetic conduction part and a non-magnetic conduction part, wherein the magnetic conduction part comprises two plate-shaped magnetizers which extend along the axial direction parallel to a stator core and are mutually overlapped along the radial direction of the stator core; the non-magnetic conducting part is attached to the front plate surface and the rear plate surface of the magnetic conducting part; the left and right ends of the magnetic conduction part are exposed and protrude out of the non-magnetic conduction part. The magnetic conductive material adopts the double-layer plate-shaped magnetic conductor, and the through holes on the inner and outer layer plate-shaped magnetic conductors are configured to have different widths, so that the magnetic conductive area of the double-layer composite magnetic slot wedge is distributed in a step shape, and a better magnetic conductive effect is realized.
Description
Technical Field
The utility model relates to the technical field of motor stator structures, in particular to a double-layer composite magnetic slot wedge, a motor stator with the same and a motor.
Background
For a motor with high power, in order to facilitate embedding a coil into a coil accommodating groove of a motor core, an open groove or a half open groove is mostly adopted. The open width of the coil receiving slot results in a notch effect of the air gap field, thus adversely affecting the performance of the motor. The magnetic slot wedge can effectively reduce the pulsation of the air gap flux density, thereby reducing the surface loss of an iron core, reducing the vibration and the electromagnetic noise of the motor, reducing the temperature rise of the motor and improving the efficiency of the motor. However, the magnetic slot wedge has a disadvantage of increasing the slot leakage of the motor, and degrades the performance of the motor related to the leakage reactance, for example, the maximum electromagnetic torque of the asynchronous motor is lowered, and the no-load current and the starting current are increased, which is a problem that needs to be solved seriously for the high-performance motor.
Chinese patent application publication No. CN108173372A discloses a laminated magnetic slot wedge, which is a hollow structure and can generate a magnetic bridge saturation effect on the cogging leakage flux when applied to a slot opening of a motor core slot, thereby effectively reducing the cogging leakage flux problem;
chinese patent publication No. CN205336005U discloses a magnetic slot wedge and a motor having the same, in which an opening for reducing magnetic flux leakage is formed through a body of the magnetic slot wedge in a thickness direction, so that magnetic loss can be reduced, and motor efficiency can be improved.
However, the magnetic slot wedges provided by the prior art are single in raw material, and the magnetic slot wedges are not suitable for stator cores with large notches or open slots only by adding through holes on the magnetic slot wedges or adjusting the size of the openings of the magnetic slot wedges.
SUMMERY OF THE UTILITY MODEL
In order to solve the above technical problems, a first object of the present invention is to provide a double-layered composite magnetic slot wedge of a motor stator, which can be applied to a stator core having a large slot opening or an open slot.
A second object of the present invention is to provide a stator of an electric machine having the above-described double-layered composite magnetic slot wedge.
A third object of the present invention is to provide an electric machine having the above-described stator.
In view of the above, an aspect of the present invention provides a double-layer composite magnetic slot wedge for a stator of an electric machine, including a magnetic conducting portion and a non-magnetic conducting portion, where the magnetic conducting portion includes two plate-shaped magnetic conductors extending in an axial direction parallel to a stator core and stacked on each other in a radial direction of the stator core, and a plurality of through holes are defined in a plate surface of the plate-shaped magnetic conductors and spaced apart from each other in a length direction of the plate-shaped magnetic conductors; the width of the through hole of the plate-shaped magnetizer close to one side of the axis of the stator core is smaller than that of the through hole of the plate-shaped magnetizer far away from one side of the axis of the stator core, so that the magnetic conduction areas are distributed in a step shape;
the non-magnetic conducting part is attached to the front plate surface and the rear plate surface of the magnetic conducting part;
the left and right ends of the magnetic conduction part are exposed and protrude out of the non-magnetic conduction part, and when the stator core is applied, the left and right ends of the magnetic conduction part are used for being inserted into the slot of the stator core.
Preferably, the width of the through hole of the plate-shaped magnetizer far away from the axle center of the stator core is smaller than the width of the notch of the stator core.
Preferably, the shapes of the end parts of the two sides of the magnetic conduction part are matched with the notch of the motor stator.
Preferably, the cross section of the through hole is rectangular, and the length extension direction of the rectangle is consistent with the length extension direction of the magnetic conductive part.
Preferably, the magnetic conductive part comprises a silicon steel sheet or an iron sheet.
Preferably, the non-magnetically permeable portion comprises a plastic or epoxy plate.
Preferably, the non-magnetic conductive part is compounded with the magnetic conductive part by means of injection molding or bonding.
In another aspect of the present invention, a stator of an electric machine is provided, which includes a stator core and a stator winding disposed on the stator core, and is characterized in that the double-layer composite magnetic slot wedge is disposed at a notch of the coil accommodating slot of the stator core.
In another aspect of the present invention, an electric motor is provided, which includes a casing, a rotor, an end cap, a bearing assembly, an output shaft, and the stator as described above, wherein the casing and the end cap enclose an accommodating space, the stator is disposed in the casing, the rotor is disposed in an axial direction of the stator, and an output end of the rotor is connected to the output shaft through the bearing assembly.
Compared with the prior art, the utility model has the beneficial effects that:
the utility model adopts the combination of the magnetic conductive material and the non-magnetic conductive material, wherein the magnetic conductive material adopts the double-layer plate-shaped magnetic conductor, and the through holes on the inner and outer layer plate-shaped magnetic conductors are configured into different widths (inner narrow and outer wide), thereby the magnetic conductive area of the double-layer composite magnetic slot wedge is distributed in a step shape, the better magnetic conductive effect is realized, the magnetic loss is effectively reduced, and the motor efficiency is improved. In addition, the thickness of the magnetic conduction part and the width of the through hole can be set to adjust the magnetic conduction performance without worrying about insufficient strength, and meanwhile, the structure can also effectively reduce the cost.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a schematic diagram of the overall structure of a double-layer composite magnetic slot wedge in an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a magnetic conductive portion in an embodiment of the present invention;
fig. 3 is a schematic view of an assembly structure of a double composite magnetic slot wedge and a stator core in the embodiment;
fig. 4 is an enlarged view of fig. 3A.
Wherein, 1, double-layer composite magnetic slot wedge; 2. a stator core;
11. a magnetic conductive portion; 12. a non-magnetically conductive portion;
111. a plate-shaped magnetizer; 112. a through hole;
21. a notch.
Detailed Description
The utility model is further described with reference to the following figures and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
As shown in fig. 1, the present embodiment provides a double-layer composite magnetic slot wedge 1 of a stator of an electric machine, which includes a magnetic conductive part 11 and a non-magnetic conductive part 12, as shown in fig. 2, where the magnetic conductive part 11 includes two plate-shaped magnetic conductors 111 extending parallel to an axial direction of a stator core 2 and stacked on each other along a radial direction of the stator core 2, and a plurality of through holes 112 disposed at intervals along a length direction of the plate-shaped magnetic conductors 111 are defined on a plate surface of the plate-shaped magnetic conductors 111; the width of the through hole 112 of the plate-shaped magnetizer 111 close to one side of the axis of the stator core 2 is smaller than the width of the through hole 112 of the plate-shaped magnetizer 111 far away from one side of the axis of the stator core 2, so that the magnetic conductive areas are distributed in a step shape;
the non-magnetic conductive part 12 is configured to be attached to the front and back plate surfaces of the magnetic conductive part 11;
the left and right ends of the magnetic conductive part 11 are exposed and protrude out of the non-magnetic conductive part 12, as shown in fig. 3 and 4, and in application, the left and right ends of the magnetic conductive part 11 are used for being inserted into the notch 21 of the stator core 2.
In a preferred embodiment, the width of the through hole 112 of the plate-shaped magnetic conductor 111 on the side far from the axial center of the stator core 2 is smaller than the width of the notch 21 of the stator core 2.
In a preferred embodiment, the two side ends of the magnetic conductive part 11 are shaped to fit the slot 21 of the stator of the motor.
In a preferred embodiment, the cross section of the through hole 112 is a rectangle, and the length extension direction of the rectangle is consistent with the length extension direction of the magnetic conductive part 11.
In a preferred embodiment, the magnetic conductive part 11 comprises a silicon steel sheet or an iron sheet.
In a preferred embodiment, the non-magnetic conductive portion 12 comprises a plastic or epoxy plate.
In a preferred embodiment, the non-magnetic conductive part 12 is compounded with the magnetic conductive part 11 by injection molding or bonding.
The present embodiment further provides a stator of an electric motor, which includes a stator core 2 and a stator winding disposed on the stator core 2, as shown in fig. 3 and 4, the double-layer composite magnetic slot wedge 1 is disposed at the notch 21 of the coil accommodating slot of the stator core 2.
The present invention also provides a motor, including a casing, a rotor, an end cap, a bearing assembly, an output shaft, and the stator as described above, wherein the casing and the end cap enclose an accommodation space, the stator is disposed in the casing, the rotor is disposed in an axial direction of the stator, and an output end of the rotor is connected to the output shaft through the bearing assembly.
The utility model adopts the combination of the magnetic conductive material and the non-magnetic conductive material, wherein the magnetic conductive material adopts the double-layer plate-shaped magnetic conductor, and the through holes on the inner and outer layer plate-shaped magnetic conductors are configured into different widths (inner narrow and outer wide), thereby the magnetic conductive area of the double-layer composite magnetic slot wedge is distributed in a step shape, the better magnetic conductive effect is realized, the magnetic loss is effectively reduced, and the motor efficiency is improved. In addition, the thickness of the magnetic conduction part and the width of the through hole can be set to adjust the magnetic conduction performance without worrying about insufficient strength, and meanwhile, the structure can also effectively reduce the cost.
Although the embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments without departing from the principle and spirit of the present invention, and any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention still fall within the technical scope of the present invention.
Claims (9)
1. The double-layer composite magnetic slot wedge of the motor stator is characterized by comprising a magnetic conduction part and a non-magnetic conduction part, wherein the magnetic conduction part comprises two plate-shaped magnetizers which extend along the axial direction parallel to a stator core and are mutually overlapped along the radial direction of the stator core, and a plurality of through holes which are arranged at intervals along the length direction of the plate-shaped magnetizer are limited on the plate surface of the plate-shaped magnetizer; the width of the through hole of the plate-shaped magnetizer close to one side of the axis of the stator core is smaller than that of the through hole of the plate-shaped magnetizer far away from one side of the axis of the stator core, so that the magnetic conduction areas are distributed in a step shape;
the non-magnetic conducting part is attached to the front plate surface and the rear plate surface of the magnetic conducting part;
the left and right ends of the magnetic conduction part are exposed and protrude out of the non-magnetic conduction part, and when the stator core is applied, the left and right ends of the magnetic conduction part are used for being inserted into the slot of the stator core.
2. The double-layer composite magnetic slot wedge of the motor stator as claimed in claim 1, wherein the width of the through hole of the plate-shaped magnetizer at the side far away from the axial center of the stator core is smaller than the width of the notch of the stator core.
3. The double-layer composite magnetic slot wedge of the motor stator as claimed in claim 1, wherein the shape of the end parts at both sides of the magnetic conductive part is matched with the slot opening of the motor stator.
4. The double-layer composite magnetic slot wedge of the motor stator as claimed in claim 1, wherein the cross section of the through hole is rectangular, and the length extension direction of the rectangle is consistent with the length extension direction of the magnetic conductive part.
5. The double-layer composite magnetic slot wedge of the motor stator as claimed in claim 1, wherein the magnetic conductive part comprises a silicon steel sheet or an iron sheet.
6. The double-layer composite magnetic slot wedge of an electric machine stator according to claim 1, wherein the non-magnetically conductive portion comprises a plastic or epoxy plate.
7. The double-layer composite magnetic slot wedge of the motor stator as claimed in claim 1, wherein the non-magnetic conductive part is compounded with the magnetic conductive part by injection molding or bonding.
8. A stator of an electric machine comprising a stator core and a stator winding disposed on the stator core, wherein the double-layer composite magnetic slot wedge according to any one of claims 1 to 7 is disposed at a notch of a coil receiving slot of the stator core.
9. An electric machine comprising a housing, a rotor, an end cap, a bearing assembly, an output shaft, and the stator of claim 8, wherein the housing and the end cap enclose a receiving space, the stator is disposed in the housing, the rotor is disposed in an axial direction of the stator, and an output end of the rotor is connected to the output shaft through the bearing assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123375691.8U CN216751354U (en) | 2021-12-29 | 2021-12-29 | Motor, motor stator and double-layer composite magnetic slot wedge thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123375691.8U CN216751354U (en) | 2021-12-29 | 2021-12-29 | Motor, motor stator and double-layer composite magnetic slot wedge thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216751354U true CN216751354U (en) | 2022-06-14 |
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ID=81939616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123375691.8U Active CN216751354U (en) | 2021-12-29 | 2021-12-29 | Motor, motor stator and double-layer composite magnetic slot wedge thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216751354U (en) |
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2021
- 2021-12-29 CN CN202123375691.8U patent/CN216751354U/en active Active
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