CN112448490B

CN112448490B - Motor stator and winding method thereof

Info

Publication number: CN112448490B
Application number: CN201910800648.XA
Authority: CN
Inventors: 王鲁; 王司暾
Original assignee: Shanghai Highly Electrical Appliances Co Ltd
Current assignee: Shanghai Highly Electrical Appliances Co Ltd
Priority date: 2019-08-28
Filing date: 2019-08-28
Publication date: 2022-08-09
Anticipated expiration: 2039-08-28
Also published as: CN112448490A

Abstract

The invention provides a motor stator and a winding method thereof, wherein the motor stator comprises a stator core; the stator winding is wound on the stator iron core and comprises a U-phase winding, a V-phase winding and a W-phase winding; the stator comprises an insulating support, a plurality of lead wires and a plurality of neutral point lead wires, wherein the insulating support is fixed on a stator core, n wiring pieces are arranged on the circumferential edge of the insulating support, n is more than or equal to 3, one wiring piece is configured to be a lead-out wire wiring piece, the other wiring piece is configured to be a neutral point wiring piece, and the rest wiring pieces are configured to be relay wiring pieces; each phase winding is provided with n-1 sections of wire passages which are connected in series, two adjacent sections of wire passages in each phase winding are connected to the relay wiring pieces, each section of wire passage is respectively connected between two adjacent wiring pieces, each section of wire passage comprises at least two coils which are connected in series, and the number of the coils contained in each section of wire passage is equal; the invention improves the winding efficiency in the production process of the motor stator structure and has convenient wiring.

Description

Motor stator and winding method thereof

Technical Field

The invention relates to the technical field of motor equipment, in particular to a motor stator and a winding method thereof.

Background

The existing motor stator structure in the compressor comprises a stator core, an insulation support and a stator winding wound on the stator core, wherein an outgoing line wiring piece and a neutral point wiring piece are arranged on the insulation support, and the stator winding is a three-phase winding and respectively comprises a U-phase winding, a V-phase winding and a W-phase winding. The coils under each phase of winding are connected in series, when the stator core winds, each phase of winding completes winding continuously once, and then the two ends of the coil of each phase of winding are respectively connected with the outgoing line wiring piece and the neutral point wiring piece. Since the coils of each phase must be wound in sequence, the stator structure makes the winding time long and the efficiency is low in mass production.

Disclosure of Invention

In view of this, the present invention provides a motor stator and a winding method thereof, which solve the problem of low winding efficiency of the existing motor stator structure and the winding method thereof.

According to an aspect of the present invention, there is provided a motor stator including:

a stator core;

the stator winding is wound on the stator iron core and comprises a U-phase winding, a V-phase winding and a W-phase winding;

the stator core comprises an insulating support and a plurality of wiring pieces, wherein the insulating support is fixed on the stator core, n wiring pieces are arranged on the circumferential edge of the insulating support, n is more than or equal to 3, one wiring piece is configured to be an outgoing line wiring piece, the other wiring piece is configured to be a neutral point wiring piece, and the rest wiring pieces are configured to be relay wiring pieces;

each phase winding is provided with n-1 sections of the wire passages which are connected in series, two adjacent sections of the wire passages in each phase winding are connected to the relay wiring pieces, each section of the wire passages is respectively connected between two adjacent wiring pieces, each section of the wire passages comprises at least two coils which are connected in series, and the number of the coils in each section of the wire passages is equal.

Preferably, the remaining wiring members are configured as relay wiring members, and three terminals are provided on each of the outgoing line wiring member, the neutral point wiring member and the relay wiring member for connecting the wire passages in the U-phase winding, the V-phase winding and the W-phase winding, respectively.

Preferably, the terminal of the outgoing line wiring piece located at the middle position and the central point of the upper surface of the insulating support form a first axis, the terminal of the relay wiring piece located at the middle position and the central point of the upper surface of the insulating support form a second axis, the first axis and the second axis form a first angle, and the value range of the first angle is 105 degrees to 165 degrees.

Preferably, the intermediate terminal of the relay wire connector and the center point of the upper surface of the insulating support form a second axis, the intermediate terminal of the neutral wire connector and the center point of the upper surface of the insulating support form a third axis, the second axis and the third axis form a second angle, and the second angle ranges from 105 degrees to 165 degrees.

According to another aspect of the present invention, there is provided a winding method of a motor stator, wherein the stator core includes n-1 stator core units, and a length of the wire path matches one of the stator core units, for winding the motor stator, the winding method comprising the steps of:

s20, in each phase winding, winding is carried out on the stator core units corresponding to the n-1 sections of the lead wire passages at the same time;

and S30, fixing the first ends of the n-1 sections of the wire paths after winding to one of the wiring pieces respectively, and fixing the second ends of the wire paths to the other wiring piece respectively.

Preferably, the remaining wire connectors on the insulating support are configured as relay wire connectors, the n-1 winding wire paths each include a wire end and a wire tail, and the step S30 includes:

s301, connecting the wire ends of the coils between the outgoing wire wiring piece and the relay wiring piece of each phase winding with terminals of corresponding phases on the outgoing wire wiring piece respectively, and connecting the wire tails with terminals of corresponding phases on the relay wiring piece adjacent to the outgoing wire wiring piece respectively;

s302, connecting the wire ends of the coils between the relay wire connecting piece and the neutral point wire connecting piece of each phase winding with terminals of corresponding phases on the relay wire connecting piece respectively, and connecting the wire ends with the terminals of corresponding phases on the neutral point wire connecting piece respectively;

and S302, respectively connecting the wire head and the wire tail of the residual coil of each phase winding to the terminal of the corresponding phase on the nearest relay connector.

Preferably, before step S20, the method further includes the steps of:

and S10, fixing the insulating support on the stator iron core.

Preferably, the number of winding slots of the motor is a, the number of wire connecting pieces is b, and each segment of the wire passage contains c coils, so that: a is more than or equal to 12 and less than or equal to 30, b is more than or equal to 3 and less than or equal to 6, and c is more than or equal to 2 and less than or equal to 4.

Preferably, the terminal of the neutral point connecting element located at the middle position and the central point of the upper surface of the insulating support form a third axis, the second axis and the third axis form a second angle, and the value range of the second angle is 105 degrees to 165 degrees.

Compared with the prior art, the invention has the beneficial effects that:

according to the motor stator and the winding method thereof provided by the invention, at least 3 wiring pieces are arranged on the insulating support, each phase winding is provided with a plurality of sections of wire passages connected in series, each section of wire passage is respectively connected between two adjacent wiring pieces, so that the plurality of sections of wire passages under the same phase winding can be wound simultaneously, the wire ends after the winding are finished are fixed on the two adjacent wiring pieces, the winding efficiency of the motor in the compressor is improved, and the production cost of a factory is also reduced.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

Fig. 1 is a schematic structural diagram of a stator of an electric machine according to an embodiment of the present invention;

fig. 2 is a partial schematic view of a stator core of a stator of an electric machine according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a terminal structure according to an embodiment of the present invention;

FIG. 4 is a schematic flow chart illustrating a winding method for a stator of a motor according to an embodiment of the present invention;

fig. 5 is a schematic diagram of a three-phase winding circuit after the winding is completed according to the embodiment of the present invention.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the subject matter of the present disclosure can be practiced without one or more of the specific details, or with other methods, materials, devices, etc. In other instances, well-known technical solutions have not been shown or described in detail to avoid obscuring aspects of the present disclosure. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted.

The terms "a," "an," "the," "said," and "at least one" are used to indicate the presence of one or more elements/components/parts/etc.; the terms "comprising," "having," and "providing" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc.

As shown in fig. 1, the present invention discloses a motor stator, including: a stator core 101, a stator winding and an insulating support 102. The stator winding is wound on a stator core 101 and comprises a U-phase winding, a V-phase winding and a W-phase winding, wherein each phase winding comprises a plurality of sections of conducting wire passages, and each section of conducting wire passage is formed by connecting at least two coils in series.

The insulating bracket 102 is fixed on the stator core 101, n wiring pieces are arranged on the circumferential edge of the insulating bracket 102, n is larger than or equal to 3, one wiring piece is configured as a leading-out wiring piece 103, the other wiring piece is configured as a neutral wiring piece 104, and the rest wiring pieces are configured as relay wiring pieces. The outgoing line connecting piece 103 is used for connecting an external outgoing line with a coil of the stator winding, that is, connecting an external power supply to the entire stator winding to supply power to the entire stator winding. The neutral connection piece 104 is used for performing collective connection on one end of each phase winding after winding is completed, and the relay connection piece is used for connecting two adjacent sections of wire passages in each phase winding.

The wiring pieces except the outgoing line wiring piece 103 and the neutral point wiring piece 104 are configured to be relay wiring pieces 105 by arranging at least 3 wiring pieces on the insulating support 102, namely, a lead wire passage in series under each phase winding is divided into n-1 sections, namely, each phase winding is provided with n-1 sections of lead wire passages in series, two adjacent sections of lead wire passages in each phase winding are connected through the relay wiring pieces, each section of lead wire passage is connected between two adjacent wiring pieces, each section of lead wire passage comprises at least two coils in series, and the number of coils in each section of lead wire passage is equal. Therefore, the winding can be started simultaneously for a plurality of sections of wire passages under each phase of winding during winding, the series connection of all coils under each phase in the traditional scheme is replaced, and then the winding is continuously completed for all coils under each phase in sequence, so that the operation time is reduced, and the winding efficiency is improved.

Specifically, as shown in fig. 2, the stator core 101 has a yoke portion 201 located at a circumferential edge, and a plurality of tooth portions 202 extending from the yoke portion 201 toward a central portion of the stator core in a radial direction of the stator core, one winding slot 203 is formed between two adjacent tooth portions 202, and the stator winding is wound around the tooth portions 202 of the stator core 101. Here, the circumferential direction of the stator core 101 refers to the circumferential direction of the stator core 101, and the radial direction of the stator core 101 refers to any diameter direction of the stator core 101.

For this embodiment, each section of the wire path is matched with one stator core unit, and each section of the wire path includes a plurality of teeth, that is, a plurality of teeth are included in one stator core unit, so that each phase of the stator winding has n-1 stator core units, and when winding starts, the n-1 stator core units corresponding to the three-phase windings are placed in the winding machine to perform winding simultaneously, that is, the teeth in each stator core unit of the three-phase windings are wound simultaneously until the teeth in each stator core unit are wound completely.

As a preferred embodiment, as shown in fig. 3, the wire connecting pieces are all in a long strip shape, three terminals 301 are arranged on the leading wire connecting piece 103, the neutral point connecting piece 104 and the relay connecting piece 105, and are respectively used for connecting coils corresponding to the U-phase winding, the V-phase winding and the W-phase winding, and the three terminals 301 are distributed on the wire connecting pieces at intervals. The wire paths are connected between two adjacent wiring members, i.e. connected to the terminals 301 of the wiring members in the corresponding phases. The terminal 301 on coil and the binding post can adopt the mode of connection of crimping, compares in prior art through carrying out the welded connected mode with the solder joint on coil and the binding post, and the setting of terminal 301 makes the wiring between coil and the binding post more convenient. The present invention is not limited to this connection method.

In a preferred embodiment, the intermediate terminal 301 of the lead wire connector 103 forms a first axis 106 with a center point of the upper surface of the insulating holder 102, the intermediate terminal 301 of the relay wire connector 105 forms a second axis 107 with a center point of the upper surface of the insulating holder 102, the first axis 106 and the second axis 107 form a first angle, as shown in fig. 1, the first angle is a1, and the first angle a1 ranges from 105 degrees to 165 degrees.

In a preferred embodiment, the terminal 301 of the neutral point wire 104 and the center point of the upper surface of the insulating holder 102 form a third axis 108, the second axis 107 and the third axis 108 form a second angle, as shown in fig. 1, the second angle is a2, and the second angle a2 is 105 degrees to 165 degrees.

In this embodiment, the number of winding slots of the motor is a, the number of wiring pieces is b, and the number of coils included in each segment of the conducting wire path is c, since the present invention is mainly directed to a micro compressor with 12 slots to 30 slots, a satisfies: a is more than or equal to 12 and less than or equal to 30. Because if the number of the wiring pieces is too many, wiring is complex, and wiring errors are easy to occur, b satisfies 3-6 and c satisfies 2-4 in the embodiment, so that convenience is brought to wiring between the coil and the wiring pieces, and the occurrence of wiring errors caused by too complex wiring is avoided to the maximum extent.

The motor stator disclosed in the embodiment is mainly applied to a motor in a micro compressor with 12 winding slots to 30 winding slots, the motor stator is provided with a plurality of wiring pieces on an insulating support 102, each phase winding is provided with a plurality of sections of wire passages connected in series, each section of wire passage is respectively connected between two adjacent wiring pieces, so that the plurality of sections of wire passages under the same phase winding can be wound simultaneously, a wire end after the winding is finished is fixed on the two adjacent wiring pieces, the winding efficiency of the motor in the compressor is improved, and the production cost of a factory is also reduced.

As shown in fig. 4, the present invention further discloses a winding method of a motor stator, which is used for winding the motor stator, and the detailed structural features and advantages of the motor stator in this embodiment may refer to the description of the above embodiment, which is not repeated herein. The winding method comprises the following steps:

s20, winding the stator core units corresponding to the n-1 lead paths in each phase winding simultaneously;

and S30, fixing the first ends of the n-1 sections of the wire paths with the finished winding to one of the wiring pieces respectively, and fixing the second ends of the n-1 sections of the wire paths to the other wiring piece respectively.

Specifically, the stator core 101 includes n-1 stator core units, each of the conductor paths is matched with one of the stator core units, a plurality of teeth are provided in one of the stator core units, and when winding is started, the teeth in each of the conductor paths under each phase of winding are simultaneously wound until the plurality of teeth in each of the conductor paths are wound.

After the winding is completed, two ends of the wire path are respectively connected with the wiring piece closest to the wire path, specifically, the wiring piece is provided with three terminals 301 respectively used for connecting the wire paths corresponding to the U-phase winding, the V-phase winding and the W-phase winding, and two ends of each phase of the wire path are respectively connected with the terminals 301 corresponding to the phase on the wiring piece closest to the wire path.

As a preferred embodiment, before step S20, the method further includes the steps of:

s10, the insulating holder 102 is fixed to the stator core 101.

As a preferred embodiment, the wiring members on the insulating support 102 except for the outgoing wiring member 103 and the neutral wiring member 104 are configured as relay wiring members 105, the n-1 sections of the wire paths, which are wound, each include a wire end and a wire tail, and the step S30 includes:

s301, connecting the ends of the coils between the lead-out wire connecting pieces 103 and the relay wire connecting pieces 105 of each phase winding to the terminals of the corresponding phases on the lead-out wire connecting pieces 103, and connecting the ends to the terminals of the corresponding phases on the relay wire connecting pieces 105 adjacent to the lead-out wire connecting pieces 103;

s302, connecting the wire ends of the coils between the relay wire connecting piece 105 and the neutral wire connecting piece 104 of each phase winding with the terminals of the corresponding phase on the relay wire connecting piece 105, and connecting the wire ends with the terminals of the corresponding phase on the neutral wire connecting piece 104;

s302, the ends and tails of the remaining coils of each phase winding are connected to the terminals of the closest corresponding phase of the intermediate connection member 105.

As a preferred embodiment, the number of winding slots of the motor is a, the number of wire connecting pieces is b, and the number of coils contained in each segment of the conducting wire passage is c, since the present invention is directed to a micro compressor with 12 slots to 30 slots, a satisfies: a is more than or equal to 12 and less than or equal to 30; on the other hand, if the number of the wiring pieces is too large, wiring is complex, and thus wiring errors are easy to occur, so that the number b of the wiring pieces arranged on the circumferential edge of the insulating support 102 in the embodiment satisfies that b is more than or equal to 3 and less than or equal to 6, and c satisfies that c is more than or equal to 2 and less than or equal to 4, thereby facilitating wiring between the coil and the wiring pieces, and maximally avoiding the occurrence of wiring errors caused by too complex wiring.

In a preferred embodiment, the intermediate terminal of the lead wire connector 103 forms a first axis with the center point of the upper surface of the insulating holder 102, the intermediate terminal of the relay wire connector 105 forms a second axis with the center point of the upper surface of the insulating holder 102, the first axis and the second axis form a first angle, and the first angle ranges from 105 degrees to 165 degrees.

In a preferred embodiment, the terminal of the neutral point wire 104 located at the middle position and the center point of the upper surface of the insulating holder 102 form a third axis, the second axis and the third axis form a second angle, and the second angle ranges from 105 degrees to 165 degrees.

The invention takes a 12-slot motor as an example, and explains the winding process of the motor: as shown in FIG. 1, the three-phase windings of the motor each include 4 coils, so that there are 12 coils, 12 coils are wound on 12 teeth, the 12 teeth are respectively U1/V1/W1, U2/V2/W2, U3/V3/W3 and U4/V4/W4, and the difference between two adjacent coils under each phase of winding is 90 degrees.

The insulating bracket 102 of the motor is provided with a relay connector 105, and the relay connector 105 is disposed at the edge of the insulating bracket 102 corresponding to the position between the tooth W2 and the tooth U3 due to the limitation of the first angle and the second angle. Specifically, during winding, the stator core units corresponding to the two sections of wire paths under each phase of winding can be simultaneously wound, namely, the teeth U1/V1/W1 and the teeth U3/V3/W3 are simultaneously wound, and then the teeth U2/V2/W2 and the teeth U4/V4/W4 are simultaneously wound.

After winding, the coil in each wire path includes a head and a tail, for example, as shown in fig. 3, the head of the coil wound on the tooth U1 is 302, and the tail is 303. As shown in fig. 5, the ends 302 of the coils wound on U1/V1/W1 are connected to the terminals of the corresponding phases on the lead-out wire connector 103, that is, the ends 302 of the coils wound on U1 are connected to the U-phase terminals on the lead-out wire connector 103, the ends 302 of the coils wound on V1 are connected to the V-phase terminals on the lead-out wire connector 103, and the ends 302 of the coils wound on W1 are connected to the W-phase terminals on the lead-out wire connector 103. The tail 303 of the coil wound on the U1/V1/W1 is respectively connected with the head of the corresponding phase of the coil wound on the U2/V2/W2, the tail 303 of the coil wound on the U2/V2/W2 is respectively connected with the terminal of the corresponding phase on the relay connector 105, the head 302 of the coil wound on the U3/V3/W3 is respectively connected with the terminal of the corresponding phase on the relay connector 105, the head 302 of the coil wound on the U4/V4/W4 is respectively connected with the tail 303 of the coil wound on the U3/V3/W3, and the tail 303 of the coil wound on the U4/V4/W4 is respectively connected with the terminal of the corresponding phase on the neutral connector 104.

The outgoing line wiring piece 103 can be connected with a wiring terminal on the shell of the compressor through an external outgoing line and a wiring box, and the other end of the wiring terminal is connected with an external power supply, so that the power supply for the whole motor stator is realized.

In summary, the winding method of the motor stator disclosed by the invention at least has the following advantages:

according to the winding method of the motor stator disclosed by the embodiment, the winding is simultaneously carried out on the wire passage between the adjacent wire pieces under each phase of winding, so that the winding efficiency of the motor of the micro compressor is improved, and the production cost of a factory is also reduced; meanwhile, the angle between the first axis and the second axis, the angle between the second axis and the third axis and the wiring complexity between the winding coil and the wiring piece are comprehensively considered, so that the number of the wire passages in each phase winding and the number of the coils in each section of the wire passages are reasonably set, the wiring between the coil and the wiring piece is greatly facilitated, and the occurrence of the wiring error condition caused by the excessively complex wiring is avoided to the maximum extent.

In the description of the present invention, it is to be understood that the terms "bottom", "longitudinal", "lateral", "upper", "lower", "front", "rear", "vertical", "horizontal", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, are used only for convenience in describing the present invention and for simplification of description, and do not indicate or imply that the structures or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, are not to be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more and "several" means one or more unless otherwise specified.

In the description herein, references to the description of "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," etc., indicate that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.

Claims

1. An electric machine stator, comprising:

a stator core (101);

the stator winding is wound on the stator iron core (101) and comprises a U-phase winding, a V-phase winding and a W-phase winding;

an insulating bracket (102) fixed on the stator core (101), wherein n wiring pieces are arranged on the circumferential edge of the insulating bracket (102), n is more than or equal to 3, one wiring piece is configured to be a leading-out wire wiring piece (103), the other wiring piece is configured to be a neutral point wiring piece (104), and the rest wiring pieces are configured to be relay wiring pieces (105);

each phase winding is provided with n-1 sections of wire passages which are connected in series, every two adjacent sections of the wire passages in each phase winding are connected to the relay wiring piece (105), each section of the wire passages are respectively connected between two adjacent wiring pieces, each section of the wire passages comprises at least two coils which are connected in series, and the number of the coils contained in each section of the wire passages is equal;

the outgoing line wiring piece (103), the neutral point wiring piece (104) and the relay wiring piece (105) are respectively provided with three terminals (301) which are respectively used for connecting the wire passages in the U-phase winding, the V-phase winding and the W-phase winding;

the terminal (301) of the outgoing line wiring piece (103) located at the middle position and the central point of the upper surface of the insulating support (102) form a first axis (106), the terminal (301) of the relay wiring piece (105) located at the middle position and the central point of the upper surface of the insulating support (102) form a second axis (107), the first axis (106) and the second axis (107) form a first angle, and the value range of the first angle is 105-165 degrees.

2. The stator of an electric machine according to claim 1, characterized in that the intermediate terminal (301) of the junction wire member (105) forms a second axis (107) with the center point of the upper surface of the insulating holder (102), the intermediate terminal (301) of the neutral wire member (104) forms a third axis (108) with the center point of the upper surface of the insulating holder (102), and the second axis (107) and the third axis (108) form a second angle, and the second angle ranges from 105 degrees to 165 degrees.

3. A method of winding a stator for an electric motor, said stator core comprising n-1 stator core elements, a length of said conductor path matching a length of said stator core elements for winding said stator for an electric motor according to claim 1, the method comprising the steps of:

s30, fixing the first ends of the n-1 sections of the conducting wire paths after winding to one of the wiring pieces respectively, and fixing the second ends of the conducting wire paths to the other wiring piece respectively;

the other wiring pieces on the insulating support are configured to be relay wiring pieces, the middle terminal of the outgoing line wiring piece and the central point of the upper surface of the insulating support form a first axis, the middle terminal of the relay wiring piece and the central point of the upper surface of the insulating support form a second axis, the first axis and the second axis form a first angle, and the first angle ranges from 105 degrees to 165 degrees.

4. The winding method of the stator of the motor according to claim 3, wherein the winding-completed n-1 segments of the wire paths each include a head and a tail, and the step S30 includes:

and S303, respectively connecting the wire head and the wire tail of the residual coil of each phase winding to the terminal of the corresponding phase on the nearest relay connector.

5. The winding method of a stator of an electric motor according to claim 3, further comprising, before the step S20, the steps of:

and S10, fixing the insulating support on the stator iron core.

6. The winding method of a stator of an electric motor according to claim 4, wherein the number of winding slots of the electric motor is a, the number of the terminal pieces is b, and each segment of the conductor path includes the number of coils of c, which satisfies: a is more than or equal to 12 and less than or equal to 30, b is more than or equal to 3 and less than or equal to 6, and c is more than or equal to 2 and less than or equal to 4.

7. A winding method of a stator of an electric machine according to claim 3, wherein the neutral terminal of the neutral connection member forms a third axis with a center point of the upper surface of the insulating support, and the second axis and the third axis form a second angle having a value ranging from 105 degrees to 165 degrees.