CN209767249U - Multiphase motor and end plate thereof - Google Patents
Multiphase motor and end plate thereof Download PDFInfo
- Publication number
- CN209767249U CN209767249U CN201920130129.2U CN201920130129U CN209767249U CN 209767249 U CN209767249 U CN 209767249U CN 201920130129 U CN201920130129 U CN 201920130129U CN 209767249 U CN209767249 U CN 209767249U
- Authority
- CN
- China
- Prior art keywords
- end plate
- axial direction
- guides
- multiphase
- motor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Insulation, Fastening Of Motor, Generator Windings (AREA)
Abstract
The utility model provides a heterogeneous motor (100) and end plate (10) thereof. The number of phases of the multi-phase motor (100) is n, n is larger than or equal to 2, the multi-phase motor (100) comprises a stator assembly (102), and the end plate (10) is located at one axial end of the stator assembly (102). The end plate (10) comprises: a plurality of guides protruding radially outward from an outer peripheral surface (11) of the end plate (10), the plurality of guides being arranged in n turns spaced apart in the axial direction, wherein any two of the plurality of guides do not overlap in the axial direction.
Description
Technical Field
The present application relates to a multiphase motor and an end plate therefor.
Background
With the development of brushless trend of electric tools, high voltage brushless motors are widely required due to their advantages of high power, long life and high efficiency. Most of the existing high-voltage brushless motors are in the form of multi-phase motors. However, the prior art multi-phase motor is not designed to take the problem of phase insulation into consideration, the magnet wires of each phase winding are wound on the end plate of the stator assembly, and the magnet wires of different phase windings are close to each other and even completely attached together. Therefore, the existing multi-phase motor has the problem of safety of phase-to-phase insulation.
In order to solve the problems, in some existing solutions, end plates for multiphase high-voltage motors are specially designed, but the end plates are often complex in structure and have high requirements on processing dies. Further, when the magnet wires of the respective phase windings are held by the end plates, there arises a problem that the number of turns of the respective windings is asymmetrical, thereby causing instability of the motor torque and the like.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned problems in the prior art, the present application aims to provide an improved motor having an end plate for guiding and holding magnet wires of a stator winding, which is simple in structure, easy to manufacture, and which enables a pitch between any two magnet wires held thereon to be equal to or greater than a distance that ensures insulation safety.
To this end, according to one aspect of the present application, there is provided an end plate for a multiphase motor having n phases, n being 2 or more, the multiphase motor including a stator assembly, the end plate being located at one end of the stator assembly in an axial direction, the end plate including: a plurality of guides protruding radially outward from an outer peripheral surface of the end plate, the plurality of guides being arranged in n turns spaced apart in the axial direction, wherein any two of the plurality of guides do not overlap in the axial direction.
according to one possible embodiment of the present application, the n turns of the guide define n-1 first annular retaining slots to retain n electromagnetic wires of n phase windings of the stator assembly.
According to one possible embodiment of the application, the n-turn guides are arranged such that the distance between any two magnet wires in the axial direction is greater than the insulation distance of the polyphase machine.
according to a possible embodiment of the application, in the n-turn guides, the width of the guides located between adjacent first annular retaining grooves in the axial direction is greater than the insulation distance.
according to a possible embodiment of the present application, each magnet wire is led out from the one end in the axial direction via the end plate so that the number of turns of each winding is equal.
According to one possible embodiment of the present application, a second annular holding groove for holding magnet wires is provided on an end surface of one end of the end plate, and the end plate is disposed such that a distance between the magnet wires in the second annular holding groove and any other magnet wire in the axial direction is larger than the insulation distance.
According to one possible embodiment of the present application, the end plate has a plurality of opening portions extending in the axial direction from an end surface of one end thereof, and n magnet wires each protrude from one of the plurality of opening portions so as to be held in the first annular holding groove by being guided by the guide.
According to one possible embodiment of the application, the plurality of opening portions have a plurality of depths in the axial direction.
According to a possible embodiment of the application, said plurality of depths comprises: extending from the end surface to different depths of each of the first annular retaining grooves, respectively, along the axial direction.
According to one possible embodiment of the present application, among the plurality of guides, a guide located near the opening portion is provided to partially cover the opening portion so that the magnet wire drawn out from the opening portion is caught in the opening portion.
According to another aspect of the present application, there is provided a multiphase motor comprising an end plate as described above.
Drawings
The above and other aspects of the present application will be more completely understood and appreciated in view of the following detailed description and in connection with the accompanying drawings, in which:
Fig. 1 is a schematic perspective view of a multiphase electric machine according to one possible embodiment of the present application;
Fig. 2 is a perspective view of the multi-phase electric machine illustrated in fig. 1;
Fig. 3A and 3B are enlarged partial views of the multi-phase electric machine illustrated in fig. 2;
Fig. 4 is a perspective view of an end plate of the polyphase electric machine illustrated in fig. 1.
Detailed Description
The subject matter described herein will be discussed with reference to example embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thereby implement the subject matter described herein, and are not intended to limit the scope, applicability, or examples set forth in the claims. Changes may be made in the function and arrangement of elements discussed without departing from the scope of the disclosure. Various examples may omit, substitute, or add various elements as needed. For example, features described with respect to some examples may also be combined in other examples.
Some embodiments of the present application will now be described with reference to the accompanying drawings.
The present application relates generally to multi-phase motors having end plates for guiding and retaining winding magnet wires, and particularly to multi-phase high voltage brushless motors for power tools.
Fig. 1 schematically shows a multiphase electric machine 100 according to one possible embodiment of the present application.
Fig. 2 is a perspective view of the multi-phase motor 100 illustrated in fig. 1. The number of phases of the multiphase motor 100 is n, n being equal to or greater than 2. It should be understood that although a 3-phase motor is illustrated in the drawings, it is not limited thereto.
As shown in fig. 1 and 2, multiphase electric machine 100 includes a stator assembly 102, and stator assembly 102 has an axial direction x (shown by the arrows in the figures). The stator assembly 102 includes a plurality of windings 14 and an end plate 10. The end plate 10 is provided at one end of the stator assembly 102 in the axial direction x for guiding and holding the magnet wires 14U, 14V, and 14W of the windings 14.
The stator assembly 10 has a plurality of stator teeth 16 distributed along a circumferential direction thereof, and a plurality of windings 14 are respectively wound on the stator teeth 16. The plurality of windings 14 may include one or more windings for each of the plurality of phases. One or more windings for each phase are connected together. For example, taking a three-phase winding as an example, a plurality of windings for the U-phase are connected to each other, forming two terminals of the U-phase winding (i.e., a U-phase first terminal and a U-phase second terminal); a plurality of windings for the V-phase are connected to each other, forming two terminals of the V-phase winding (i.e., a V-phase first terminal and a V-phase second terminal); and the plurality of windings for the W-phase are connected to each other, forming two terminals (i.e., a W-phase first terminal and a W-phase second terminal) of the W-phase winding. The U-phase first terminal of the U-phase winding, the V-phase first terminal of the V-phase winding, and the W-phase first terminal of the W-phase winding are connected together to form a common terminal. The U-phase second terminal of the U-phase winding, the V-phase second terminal of the V-phase winding, and the W-phase second terminal of the W-phase winding are led out, respectively, as magnet wires 14U, 14V, 14W shown in fig. 1 and 2. Thus, only one magnet wire is drawn for each phase winding. With continued reference to fig. 2, the plurality of stator teeth 16 are spaced apart from one another to form a plurality of stator slots 162 that respectively receive the plurality of windings 14.
each of the plurality of windings 14 includes the following three portions: a coil portion wound on the stator teeth 16 and received in the stator slot 162, a bridge wire portion guided and held on the surface 11 of the end plate 10, and a connection wire portion protruding from the bridge wire portion so as to be connected with other elements. In the solution of the present application, only one magnet wire is led out of each phase winding to the end plate 10, then guided over the end plate 10, and then connected to other elements (not shown) of the multiphase motor 100. Thus, according to the present application, the magnet wires 14U, 14V, 14W of each phase winding are all routed from the same end of the stator assembly 102 in the axial direction x (i.e., the end where the end plate 10 is located) such that the number of winding turns in each stator slot 162 is equal, and there is no problem of unequal numbers of winding turns in the stator slots 162 due to some of the winding magnet wires being routed from one end of the stator assembly in the axial direction and others being routed from the other end of the stator assembly in the axial direction. Thus, according to the present application, the windings of the multi-phase electric machine 100 are symmetrical and torque is stable.
The specific structure of the end plate 10 will be described below with reference to the drawings. It should be understood that although a three-phase motor and an end plate for the three-phase motor are illustrated in the drawings, the present application is not limited thereto. For other phase numbers of motors and corresponding end plate structures, adaptive adjustment can be performed on the basis of the structure described herein.
Fig. 4 exemplarily shows an enlarged view of the end plate 10 of the multiphase motor 100 illustrated in fig. 1. In order to clearly show the structure of the end plate 10, the end plate 10 is shown in fig. 4 in a state where the magnet wires are not held. As shown in fig. 4, the end plate 10 has a plurality of guides 18 projecting outwardly from the surface 11 thereof. The plurality of guides 18 are arranged in 3 turns 181, 182, 183 spaced apart in the axial direction x, see the dashed lines in fig. 4. Each of the three loops of guides 181, 182, 183 has a plurality of individual guides 18. That is, each loop guide 181, 182, 183 includes a plurality of spaced apart individual guides 18. The three turns of the guides 181, 182, 183 spaced apart from each other form two first annular retaining grooves 191, 192 for retaining the magnet wires 14U, 14V, 14W. In the plurality of guides 18, any two guides 18 do not overlap in the axial direction x. That is, on the surface 11 of the end plate 10, there is no overlapping portion of any two guides 18 in the direction along the axial direction x.
As is apparent from the above description, according to the end plate 10 of the embodiment of the present application, the magnet wires 14U, 14V, 14W of the winding 14 can be guided and held. Further, the die for processing the end plate 10 does not need a side core back type member. Since any two guides 18 of the end plate 10 according to the present application do not overlap in the axial direction x, the mold for machining the end plate 10 is split after the end plate 10 is machined to remove the end plate 10, and there is no need to specially design a side core back style member to remove the end plate 10.
The plurality of guides 18 are arranged such that the distance in the axial direction x between any two magnet wires is larger than the insulation distance of the multiphase motor 100, thereby ensuring insulation between magnet wires of different phases, thereby improving the safety of the multiphase motor 100.
In the present application, the insulation distance refers to the shortest distance that insulation can be achieved by air under the condition of ensuring stable and safe electrical performance specified according to the IEC standard. In the present application, the insulation distance may include an electrical gap, a creepage distance, and a distance for ensuring stable and safe electrical performance according to a customized requirement.
With continued reference to fig. 4, in order to make the distance in the axial direction between magnet wires retained on the surface 11 of the end plate 10 greater than the insulation distance, that is, to make the axial distance between adjacent magnet wires located in the first annular retaining grooves 191 and 192 greater than the insulation distance, in one embodiment, the width in the axial direction x of the guides 18 of the second ring 182 may be set to be equal to or greater than the insulation distance. Thus, the magnet wires 14U, 14V in the first annular retaining grooves 191 and 192 are spaced apart by the guides 18 of the second ring 182 by the width of the guides 18 of the second ring 182 in the axial direction x. In this way, by setting the axial width of the guides 18 of the middle portion of the end plate 10 (i.e., the guides other than the two turns of guides closest to the two ends of the end plate 10) to be equal to or greater than the electrical pitch, safe insulation between magnet wires of different phases is achieved.
With continued reference to fig. 2, in order to reduce the size of the end plate 10 while enhancing the housing capability of the end plate 10, a second annular retaining groove 251 is provided on the end surface 25 of one end of the end plate 10 for retaining the magnet wire. The end plate 10 is disposed such that the distance in the axial direction between the magnet wire in the second annular holding groove 251 and the other magnet wire is equal to or greater than the electrical pitch. For example, the distance in the axial direction x between the magnet wires located in the second annular holding groove 251 and the magnet wires located in the first annular holding groove 191 is equal to or greater than the insulation distance.
Fig. 3A and 3B show partial enlarged views of the multiphase motor 100 of fig. 2, wherein fig. 3A and 3B show enlarged views of circled portions of dashed-line boxes a and B of fig. 2, respectively. Referring to fig. 3A and 3B, the end plate 10 has a plurality of opening portions 22 extending in the axial direction x from an end surface 25. The magnet wires 14U, 14V, and 14W are respectively projected from one of the opening portions 22 so as to be held in the first annular holding grooves 191, 192. The plurality of opening portions 22 have a plurality of depths in the axial direction x, for example, the depths of the opening portions 22 include different depths extending from the end surface 25 to the retaining grooves 191 and 192 in the first annular retaining groove, respectively, along the axial direction x.
in order to more firmly hold the magnet wires 14U, 14V, and 14W in the opening portion 22, the guide member 18 located in the vicinity of the opening portion 22 is provided to partially cover the opening portion thereat (see the circled guide member 18 and opening portion 22 in fig. 3B), so that the magnet wires drawn out from the opening portion 22 are caught in the opening portion. That is, the width of the opening portion is reduced by disposing the guide member in the vicinity of the opening portion so as to partially cover the opening portion, so that the magnet wire drawn out from the opening portion is firmly held in the reduced opening.
As apparent from the above description, the end plate according to the present application is simple in structure, convenient to process, and allows the interval between any two magnet wires held on the end plate 10 to be equal to or greater than a safe distance, thereby achieving phase-to-phase insulation. Moreover, the multiphase motor according to the present application adopts the end plate having the above-described characteristics, so that the number of turns of the electromagnetic wire of each winding of the multiphase motor is equal, and thus the torque of the multiphase motor according to the present application is stable, thereby improving safety.
Although the present application has been described herein with reference to particular embodiments, the scope of the present application is not intended to be limited to the details shown. Various modifications may be made to these details without departing from the underlying principles of the application.
Claims (10)
1. An end plate (10) for a multiphase motor (100), wherein the multiphase motor (100) has n phases, n being greater than or equal to 2, the multiphase motor (100) comprising a stator assembly (102), the end plate (10) being located at one axial end of the stator assembly (102), the end plate (10) characterized by comprising:
A plurality of guides protruding radially outward from an outer peripheral surface (11) of the end plate (10), the plurality of guides being arranged in n turns spaced apart in the axial direction, wherein any two of the plurality of guides do not overlap in the axial direction.
2. The end plate (10) of claim 1, wherein n turns of the guide define n-1 first annular retention slots to retain n magnet wires of n phase windings (14) of the stator assembly (102).
3. The end plate (10) for a multiphase electric motor (100) of claim 1 or 2, characterized in that n turns of guides are arranged such that the distance between any two magnet wires in the axial direction is larger than the insulation distance of the multiphase electric motor (100).
4. The end plate (10) for a multiphase electric motor (100) of claim 3 wherein of the n turns of guides, the guides located between adjacent first annular retention slots have a width in the axial direction greater than the insulation distance.
5. The end plate (10) for a multiphase electric motor (100) in accordance with claim 2, wherein each magnet wire is led out from the one end in the axial direction via the end plate (10) such that the number of turns of each winding is equal.
6. The end plate (10) for a multiphase electric motor (100) in accordance with claim 3, characterized in that a second annular retaining groove for retaining magnet wires is provided on an end surface (25) of one end of the end plate (10), and the end plate (10) is disposed such that a distance between a magnet wire in the second annular retaining groove and any other magnet wire in the axial direction is larger than the insulation distance.
7. The end plate (10) for a multiphase electric motor (100) in accordance with claim 2, wherein the end plate (10) has a plurality of opening portions extending in the axial direction from an end surface (25) of one end thereof, and n magnet wires each protrude from one of the plurality of opening portions so as to be guided by the guide to be held in the first annular holding groove.
8. The end plate (10) for a multiphase electric motor (100) of claim 7, wherein the plurality of open portions have a plurality of depths in the axial direction, the plurality of depths including different depths extending from the end surface (25) along the axial direction to each of the first annular retaining grooves, respectively.
9. The end plate (10) for a multiphase motor (100) in accordance with claim 8, wherein of the plurality of guides, a guide located near the opening portion is provided to partially cover the opening portion so that the magnet wires drawn out from the opening portion are caught in the opening portion.
10. A multiphase electric machine comprising an end plate according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920130129.2U CN209767249U (en) | 2019-01-25 | 2019-01-25 | Multiphase motor and end plate thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920130129.2U CN209767249U (en) | 2019-01-25 | 2019-01-25 | Multiphase motor and end plate thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209767249U true CN209767249U (en) | 2019-12-10 |
Family
ID=68750380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920130129.2U Active CN209767249U (en) | 2019-01-25 | 2019-01-25 | Multiphase motor and end plate thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209767249U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111799912A (en) * | 2020-06-24 | 2020-10-20 | 珠海凯邦电机制造有限公司 | Stator winding structure, stator and motor winding method |
-
2019
- 2019-01-25 CN CN201920130129.2U patent/CN209767249U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111799912A (en) * | 2020-06-24 | 2020-10-20 | 珠海凯邦电机制造有限公司 | Stator winding structure, stator and motor winding method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4465395B2 (en) | Rotating electrical power collection and distribution ring | |
| JP5759238B2 (en) | Power collection and distribution ring and manufacturing method thereof | |
| EP2827476B1 (en) | Stator and method for manufacturing stator | |
| JP5920259B2 (en) | Coil, rotating electric machine, and method of manufacturing rotating electric machine | |
| EP2690757A2 (en) | Electricity collection and distribution ring and electric motor | |
| KR101826126B1 (en) | Three-phase electromagnetic motor | |
| EP3252926B1 (en) | Wind power generator and stator iron core thereof, and stator iron core module | |
| CN108736614B (en) | Stator of rotating electric machine | |
| US20140265708A1 (en) | Dual magnetic phase rotor laminations for induction machines | |
| EP2031735B1 (en) | Stator and electric motor | |
| CN108370184B (en) | Rotating electrical machine | |
| EP4040646B1 (en) | Stator assembly and motor | |
| CN209767249U (en) | Multiphase motor and end plate thereof | |
| US9543799B2 (en) | Single rotor-type motor | |
| CN109149831B (en) | Three-phase motor and wire connecting structure and method thereof | |
| EP4037157A1 (en) | Stator of electric machine and electric machine | |
| JP2019193471A (en) | Rotary electric machine stator | |
| JP2009261083A (en) | Electric power collection/distribution ring of rotary electric machine | |
| CN110867994B (en) | Rotating electrical machine | |
| KR20220007448A (en) | Bus bar unit for motor | |
| CN112332564A (en) | Motor stator and motor | |
| CN112467896A (en) | Stator structure of motor, manufacturing method thereof and brushless motor with stator structure | |
| CN112152338A (en) | Motor stator, motor with same and manufacturing method of motor stator | |
| JP2014192997A (en) | Electric motor | |
| CN213637231U (en) | Motor stator and motor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |