Stator structure, winding method, motor and compressor

Abstract

The application provides a stator structure, a winding method, a motor and a compressor, wherein the stator structure comprises a stator core, the stator core has a plurality of winding teeth, a cross section of the stator core is a projection plane, the stator core is circumferentially divided into six identical areas, two areas oppositely arranged in the six areas form a phase winding, one phase winding comprises a main winding and a sub winding, the main winding is composed of a first tooth and a second tooth oppositely arranged, and the sub winding is composed of a third tooth and a fourth tooth oppositely arranged; the first tooth is wound at one end of the stator core and then over-wound to the second tooth for winding, and the third tooth is wound at the other end of the stator core and then over-wound to the fourth tooth for winding. According to the application, the technical problem that the over-winding of the stator winding in the prior art exists phase-to-phase crossing and leads to complicated post-processing wiring treatment can be solved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of electric machines, and particularly relates to a stator structure, a winding method, an electric machine and a compressor. BACKGROUND

[0002] Traditional winding methods of permanent magnet synchronous machines mainly include single star connection and angle connection. For specific slot-pole combinations, for example, for a 12-slot 10-pole motor, there is no obvious advantage in motor efficiency compared with commonly used 9-slot 6-pole and 12-slot 8-pole motors when using conventional series-parallel winding and star-delta connection. When using series-parallel winding for a 12-slot 10-pole motor, 6 times of wire passing is required, and there is crossing using the existing 3-layer wire passing framework. Single winding connection method cannot meet the requirements of motor efficiency, and there is phase-to-phase crossing in wire passing, and there are many connection ends and complex post-processing.

[0003] Due to the technical problems of phase-to-phase crossing in wire passing of the stator winding in the prior art and complex post-processing connection, the present application researches and designs a stator structure, a winding method, an electric machine and a compressor. SUMMARY

[0004] Therefore, the present application provides a stator structure, a winding method, an electric machine and a compressor, which can solve the technical problem of phase-to-phase crossing in wire passing of the stator winding in the prior art, leading to complex post-processing connection.

[0005] In order to solve the above problems, the present application provides a stator structure, comprising: a stator core, the stator core has a plurality of winding teeth, the cross section of the stator core is a projection plane, the stator core is divided into six identical areas along the circumferential direction, two oppositely arranged areas in the six areas form a phase winding, one phase winding includes a main winding and an auxiliary winding, the main winding is composed of a first tooth and a second tooth arranged oppositely, and the auxiliary winding is composed of a third tooth and a fourth tooth arranged oppositely; the first tooth is passed to the second tooth for winding after winding at one end of the stator core, and the third tooth is passed to the fourth tooth for winding after winding at the other end of the stator core.

[0006] In some embodiments, one end of the stator core is provided with a first framework, the other end of the stator core is provided with a second framework, and the first framework and the second framework are the same in structure.

[0007] In some embodiments, the main winding is wound starting from the wire inlet on the back surface of the stator core, the first tooth is passed to the second tooth for winding after winding through the first framework, the second tooth is wired out from the other end of the stator core after winding, the third tooth is passed to the fourth tooth for winding after winding through the second framework, and the fourth tooth is wired out from one end of the stator core after winding.

[0008] In some embodiments, the main winding and the auxiliary winding comprise an incoming wire end, a winding portion, a wire passing portion, and an outgoing wire end. The main winding adopts a star connection, and the auxiliary winding adopts an angle connection. The main winding and the auxiliary winding of each phase are connected in parallel.

[0009] In some embodiments, the three-phase winding comprises a U-phase winding, a W-phase winding, and a V-phase winding. The outgoing wire end of the main winding of the U-phase winding, the incoming wire end of the auxiliary winding of the U-phase winding, and the outgoing wire end of the auxiliary winding of the W-phase winding are connected as the outgoing wire of the U-phase winding. The outgoing wire end of the main winding of the V-phase winding, the incoming wire end of the auxiliary winding of the V-phase winding, and the outgoing wire end of the auxiliary winding of the U-phase winding are connected as the outgoing wire of the V-phase winding. The outgoing wire end of the main winding of the W-phase winding, the incoming wire end of the auxiliary winding of the W-phase winding, and the outgoing wire end of the auxiliary winding of the V-phase winding are connected as the outgoing wire of the W-phase winding.

[0010] In some embodiments, the three-phase winding comprises a U-phase winding, a W-phase winding, and a V-phase winding. The outgoing wire end of the main winding of the U-phase winding, the incoming wire end of the auxiliary winding of the U-phase winding, and the outgoing wire end of the auxiliary winding of the V-phase winding are connected as the outgoing wire of the U-phase winding. The outgoing wire end of the main winding of the V-phase winding, the incoming wire end of the auxiliary winding of the V-phase winding, and the outgoing wire end of the auxiliary winding of the W-phase winding are connected as the outgoing wire of the V-phase winding. The outgoing wire end of the main winding of the W-phase winding, the incoming wire end of the auxiliary winding of the W-phase winding, and the outgoing wire end of the auxiliary winding of the U-phase winding are connected as the outgoing wire of the W-phase winding.

[0011] In some embodiments, the incoming wire ends of the three-phase main windings are star-connected as a common end. The outgoing wire is arranged at the other end of the stator core, and the common end is arranged at one end of the stator core.

[0012] In some embodiments, the main winding is composed of the winding wound on the first tooth and the winding wound on the second tooth connected in series. The auxiliary winding is composed of the winding wound on the third tooth and the winding wound on the fourth tooth connected in series.

[0013] In some embodiments, along the circumferential direction of the stator core, the first teeth of the three-phase main windings are spaced 120 degrees apart. The third teeth of the three-phase auxiliary windings are spaced 120 degrees apart.

[0014] The present application also provides a winding method of the stator structure as described above. The three-phase winding is a U-phase winding, a W-phase winding, and a V-phase winding.

[0015] The main winding of the U phase is wound from the incoming terminal, wound counterclockwise on the first tooth, wound clockwise on the second tooth after passing through the first skeleton, and ended at the outgoing terminal; the main winding of the V phase is wound from the incoming terminal, wound counterclockwise on the first tooth, wound clockwise on the second tooth after passing through the first skeleton, and ended at the outgoing terminal; the main winding of the W phase is wound from the incoming terminal, wound counterclockwise on the first tooth, wound clockwise on the second tooth after passing through the first skeleton, and ended at the outgoing terminal.

[0016] In some embodiments, the secondary winding of the U phase is wound from the incoming terminal, wound clockwise on the third tooth, wound counterclockwise on the fourth tooth after passing through the second skeleton, and ended at the outgoing terminal; the secondary winding of the V phase is wound from the incoming terminal, wound clockwise on the third tooth, wound counterclockwise on the fourth tooth after passing through the second skeleton, and ended at the outgoing terminal; the secondary winding of the W phase is wound from the incoming terminal, wound clockwise on the third tooth, wound counterclockwise on the fourth tooth after passing through the second skeleton, and ended at the outgoing terminal.

[0017] In some embodiments, the incoming terminal of the main winding of the U phase, the incoming terminal of the main winding of the V phase, and the incoming terminal of the main winding of the W phase are star-connected as a common terminal; the outgoing terminal of the main winding of the U phase, the incoming terminal of the secondary winding of the U phase, and the outgoing terminal of the secondary winding of the W phase are connected as the outgoing line of the U phase; the outgoing terminal of the main winding of the V phase, the incoming terminal of the secondary winding of the V phase, and the outgoing terminal of the secondary winding of the U phase are connected as the outgoing line of the V phase; the outgoing terminal of the main winding of the W phase, the incoming terminal of the secondary winding of the W phase, and the outgoing terminal of the secondary winding of the V phase are connected as the outgoing line of the W phase.

[0018] The application also provides an electric machine comprising the foregoing stator structure.

[0019] The application also provides a compressor comprising the foregoing stator structure.

[0020] The stator structure, winding method, electric machine and compressor provided by the application have the following beneficial effects:

[0021] By winding the first tooth at one end of the stator core and then passing it to the second tooth for winding, and winding the third tooth at the other end of the stator core and then passing it to the fourth tooth for winding, the back electromotive force is improved, the efficiency of the electric machine is improved, and the problems of low efficiency, winding crossing and complex post-processing wiring of the traditional connection method are solved. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the description of the embodiments or the prior art. The drawings in the following description are only exemplary, and other drawings can be obtained by the provided drawings without creative labor for those skilled in the art.

[0023] Figure 1 is a structure diagram of a stator structure of the present application Figure 1 ;

[0024] Figure 2 is a structure diagram of a stator structure of the present application Figure 2 ;

[0025] Figure 3 is a winding diagram of the other end of the stator core in the stator structure of the present application;

[0026] Figure 4 is a winding diagram of the other end of the stator core in the stator structure of the present application;

[0027] Figure 5 is a winding diagram of the other end of the stator core in the stator structure of the present application.

[0028] The reference signs are:

[0029] 1, first tooth; 2, second tooth; 3, third tooth; 4, fourth tooth. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0031] In the description of the present application, it should be understood that the orientation words such as "front, back, up, down, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate and imply that the indicated device or element must have a specific orientation or be constructed and operated in a specific orientation, therefore it cannot be understood as a limitation on the protection scope of the present application; the orientation words "inner, outer" refer to the inner and outer relative to the contour of each component.

[0032] For purposes of the description hereinafter, spatial relative terms, such as "above", "below", "upper", "lower", and the like, can be used to describe the relative position of one element or feature to another element or feature as illustrated in the figures. It will be understood that the spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "up" other elements or features would then be oriented "below" or "down" the other elements or features. Thus, the exemplary term "above" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatial relative descriptors used herein interpreted accordingly.

[0033] In addition, it should be noted that the use of "first", "second", and the like words of resemblance to define parts, only for the convenience of distinguishing the corresponding parts, and if there is no further declaration, the above words have no special meaning, and therefore cannot be understood as limiting the scope of protection of the present application.

[0034] With reference to the accompanying drawings Figures 1-5 As shown, according to the embodiment of the present application, a stator structure is provided, comprising: a stator core, the stator core has a plurality of winding teeth, taking the cross section of the stator core as the projection plane, the stator core is divided into six identical areas along the circumference, two oppositely arranged areas in the six areas constitute a phase winding, one phase winding includes a main winding and an auxiliary winding, the main winding is composed of oppositely arranged first tooth 1 and second tooth 2, and the auxiliary winding is composed of oppositely arranged third tooth 3 and fourth tooth 4; the first tooth 1 is wired at one end of the stator core and wired to the second tooth 2 for winding, and the third tooth 3 is wired at the other end of the stator core and wired to the fourth tooth 4 for winding. In this technical solution, by wiring the first tooth 1 at one end of the stator core and wiring to the second tooth 2 for winding, and wiring the third tooth 3 at the other end of the stator core and wiring to the fourth tooth 4 for winding, the back electromotive force is improved without changing the symmetry of the magnetic circuit, the motor efficiency is improved, and the problems of low motor efficiency, winding crossing and complex post-processing wiring of the traditional connection method are solved.

[0035] In some embodiments, a first skeleton is arranged at one end of the stator core, and a second skeleton is arranged at the other end of the stator core, and the first skeleton and the second skeleton are identical in structure.

[0036] The stator core in the stator structure of this invention has 12 winding teeth arranged at intervals along its circumference, with each winding tooth spaced 30 degrees apart. The winding is axially wound around the winding teeth. For a three-phase AC motor, each phase winding has 4 winding teeth. Taking one winding tooth as a reference tooth 1, the winding wound on the corresponding tooth 1 that is 180 degrees away from it in space constitutes a set of windings, called the main winding. The winding wound on another reference tooth 2 adjacent to the aforementioned corresponding tooth 1 in a certain direction and the corresponding tooth 2 that is 180 degrees away from it in space constitutes another set of windings, called the auxiliary winding.

[0037] The main winding and auxiliary winding of the three-phase AC motor include an input terminal, a winding section, a lead-through section, and an output terminal. The main winding is connected in a star configuration, and the auxiliary winding is connected in a delta configuration. Each phase of the main winding and auxiliary winding is then connected in parallel.

[0038] For a 12-slot, 10-pole three-phase AC motor, conventional winding connections are no longer sufficient to meet performance requirements. The stator structure of this invention can improve back EMF and motor efficiency without altering the magnetic circuit symmetry. Furthermore, the stator structure employs separate winding and routing on the front and back sides of the core, simplifying winding routing and post-processing wiring, and streamlining the frame structure. The same frame is used at both ends, reducing frame molding costs.

[0039] The stator structure of this invention includes a stator core and windings wound on its winding teeth. The stator core has 12 winding teeth evenly distributed circumferentially. The four windings on two adjacent winding teeth and two winding teeth symmetrically arranged 180 degrees apart constitute one phase winding of a three-phase motor. Each phase winding includes a main winding and a secondary winding. The main winding consists of a reference tooth and corresponding windings, and the secondary winding consists of a reference tooth and corresponding windings.

[0040] In some embodiments, the main winding begins with the wire entering from the reverse side of the stator core. After winding on the first tooth 1, the wire passes through the first frame and then to the second tooth 2 for further winding. After winding on the second tooth 2, the wire exits from the other end of the stator core. After winding on the third tooth 3, the wire passes through the second frame and then to the fourth tooth 4 for further winding. After winding on the fourth tooth 4, the wire exits from one end of the stator core. By using separate winding and passing on the front and back sides of the core, the winding passing and post-processing wiring are simplified, the frame structure is simplified, and the same frame is used at both ends, reducing the frame molding cost.

[0041] The stator structure of the present invention is suitable for a stator with S slots, 2*P poles, and m phases, satisfying: S=2*P±2=4*m.

[0042] In some embodiments, the main winding, the secondary winding include an incoming line end, a winding portion, a wire passing portion, an outgoing line end. The main winding adopts a star connection, and the secondary winding adopts an angle connection, and each phase of the main winding and the secondary winding is connected in parallel.

[0043] The star connection of the three-phase circuit refers to a connection mode in which three ends are connected together to lead out a neutral line, and three phase lines are led out from three first ends. The angle connection refers to a connection mode in which the end of each phase of a three-phase power supply or load is connected with the front end of the subsequent phase, and then the end lines are led out from the three connection points. The main winding adopts a star connection, and the secondary winding adopts an angle connection, and each phase of the main winding and the secondary winding is connected in parallel. The winding mode is wound according to the scheme, and the winding coefficient is higher. The star and angle mixed winding can improve the winding coefficient, eliminate the magnetic motive force sub-harmonic of 12S10P, reduce the motor iron loss, and improve the efficiency.

[0044] In some embodiments, the three-phase winding includes a U-phase winding, a W-phase winding and a V-phase winding, the outgoing line end of the main winding of the U-phase winding, the incoming line end of the secondary winding of the U-phase winding and the outgoing line end of the secondary winding of the W-phase winding are connected as the U-phase winding outgoing line, the outgoing line end of the main winding of the V-phase winding, the incoming line end of the secondary winding of the V-phase winding and the outgoing line end of the secondary winding of the U-phase winding are connected as the V-phase winding outgoing line, and the outgoing line end of the main winding of the W-phase winding, the incoming line end of the secondary winding of the W-phase winding and the outgoing line end of the secondary winding of the V-phase winding are connected as the W-phase winding outgoing line.

[0045] In some embodiments, the three-phase winding includes a U-phase winding, a W-phase winding and a V-phase winding, the outgoing line end of the main winding of the U-phase winding, the incoming line end of the secondary winding of the U-phase winding and the outgoing line end of the secondary winding of the V-phase winding are connected as the U-phase winding outgoing line, the outgoing line end of the main winding of the V-phase winding, the incoming line end of the secondary winding of the V-phase winding and the outgoing line end of the secondary winding of the W-phase winding are connected as the V-phase winding outgoing line, and the outgoing line end of the main winding of the W-phase winding, the incoming line end of the secondary winding of the W-phase winding and the outgoing line end of the secondary winding of the U-phase winding are connected as the W-phase winding outgoing line.

[0046] According to the winding method, the winding and the wire passing are avoided, the post-processing wiring is simple, the same skeleton can be used at both ends of the motor, and the mold opening cost is reduced.

[0047] In some embodiments, the incoming line end of the three-phase main winding is star-connected as a common end, the outgoing line is arranged at the other end of the stator core, and the common end is arranged at one end of the stator core.

[0048] In some embodiments, the main winding is composed of the winding wound on the first tooth 1 and the winding wound on the second tooth 2 in series; and the auxiliary winding is composed of the winding wound on the third tooth 3 and the winding wound on the fourth tooth 4 in series.

[0049] The windings wound on the two teeth in the in-phase main winding and the auxiliary winding are in series, and the windings of the three-phase motor are symmetrical and spaced 120 degrees apart in space.

[0050] In some embodiments, along the circumference of the stator core, the first teeth 1 of the three-phase main winding are spaced 120 degrees apart; and the third teeth 3 of the three-phase auxiliary winding are spaced 120 degrees apart.

[0051] The main winding is composed of the winding wound on the reference tooth 1 and the winding wound on the corresponding tooth 1 in series; and the auxiliary winding is composed of the winding wound on the reference tooth 2 and the winding wound on the corresponding tooth 2 in series.

[0052] The reference teeth of the three-phase main winding are spaced 120 degrees apart in circumference; and the reference teeth of the three-phase auxiliary winding are spaced 120 degrees apart in circumference. The main winding is wound starting from the wire inlet on the reverse surface of the stator core, wound on the reference tooth, passed through the first skeleton to the corresponding tooth, and then wound on the corresponding tooth, and finally the wire outlet on the front surface of the stator core. The auxiliary winding is wound starting from the wire inlet on the front surface of the stator core, wound on the reference tooth, passed through the second skeleton to the corresponding tooth, and then wound on the corresponding tooth, and finally the wire outlet on the front surface of the stator core. The first skeleton and the second skeleton are the same in structure and are respectively installed on the front surface and the reverse surface of the stator core. The wire outlet end of the U-phase main winding, the wire inlet end of the U-phase auxiliary winding and the wire outlet end of the W-phase auxiliary winding are connected as the U-phase lead-out wire; the wire outlet end of the V-phase main winding, the wire inlet end of the V-phase auxiliary winding and the wire outlet end of the U-phase auxiliary winding are connected as the V-phase lead-out wire; and the wire outlet end of the W-phase main winding, the wire inlet end of the W-phase auxiliary winding and the wire outlet end of the V-phase auxiliary winding are connected as the W-phase lead-out wire. Alternatively, the wire outlet end of the U-phase main winding, the wire inlet end of the U-phase auxiliary winding and the wire outlet end of the V-phase auxiliary winding are connected as the U-phase lead-out wire; the wire outlet end of the V-phase main winding, the wire inlet end of the V-phase auxiliary winding and the wire outlet end of the W-phase auxiliary winding are connected as the V-phase lead-out wire; and the wire outlet end of the W-phase main winding, the wire inlet end of the W-phase auxiliary winding and the wire outlet end of the U-phase auxiliary winding are connected as the W-phase lead-out wire. The wire inlet ends of the three-phase main winding are star-connected as the common end. The winding on the reference tooth of the main winding is wound counterclockwise, and the winding on the corresponding tooth is wound clockwise. The winding on the reference tooth of the auxiliary winding is wound clockwise, and the winding on the corresponding tooth is wound counterclockwise. In this way, the winding coefficient is higher. The lead-out wires are arranged on the front surface of the core. The common end is arranged on the reverse surface of the core.

[0053] The application further provides a winding method of the stator structure, and the three-phase winding is a U-phase, a W-phase and a V-phase.

[0054] The main winding of the U phase is wound from the incoming terminal, wound counterclockwise on the first tooth 1, wound clockwise on the second tooth 2 after passing through the first skeleton, and ended by the outgoing terminal; the main winding of the V phase is wound from the incoming terminal, wound counterclockwise on the first tooth 1, wound clockwise on the second tooth 2 after passing through the first skeleton, and ended by the outgoing terminal; the main winding of the W phase is wound from the incoming terminal, wound counterclockwise on the first tooth 1, wound clockwise on the second tooth 2 after passing through the first skeleton, and ended by the outgoing terminal.

[0055] The main winding of the U phase is wound from the incoming terminal UZJ, wound counterclockwise on the reference tooth, wound clockwise on the corresponding tooth after passing through the first skeleton on the front of the stator core, and ended by the outgoing terminal UZC; the main winding of the V phase is wound from the incoming terminal VZJ, wound counterclockwise on the reference tooth, wound clockwise on the corresponding tooth after passing through the first skeleton on the front of the stator core, and ended by the outgoing terminal VZC; the main winding of the W phase is wound from the incoming terminal WZJ, wound counterclockwise on the reference tooth, wound clockwise on the corresponding tooth after passing through the first skeleton on the front of the stator core, and ended by the outgoing terminal WZC.

[0056] In some embodiments, the secondary winding of the U phase is wound from the incoming terminal, wound clockwise on the third tooth 3, wound counterclockwise on the fourth tooth 4 after passing through the second skeleton, and ended by the outgoing terminal; the secondary winding of the V phase is wound from the incoming terminal, wound clockwise on the third tooth 3, wound counterclockwise on the fourth tooth 4 after passing through the second skeleton, and ended by the outgoing terminal; the secondary winding of the W phase is wound from the incoming terminal, wound clockwise on the third tooth 3, wound counterclockwise on the fourth tooth 4 after passing through the second skeleton, and ended by the outgoing terminal.

[0057] The secondary winding of the U phase is wound from the incoming terminal UFJ, wound clockwise on the reference tooth, wound counterclockwise on the corresponding tooth after passing through the second skeleton on the back of the stator core, and ended by the outgoing terminal UFC; the secondary winding of the V phase is wound from the incoming terminal VFJ, wound clockwise on the reference tooth, wound counterclockwise on the corresponding tooth after passing through the second skeleton on the back of the stator core, and ended by the outgoing terminal VFC; the secondary winding of the W phase is wound from the incoming terminal WFJ, wound clockwise on the reference tooth, wound counterclockwise on the corresponding tooth after passing through the second skeleton on the back of the stator core, and ended by the outgoing terminal WFC.

[0058] The reference tooth can be clockwise or counterclockwise, but the winding direction of two teeth of the same winding is opposite, and the winding direction of adjacent winding teeth of different windings is opposite. The combined potential generated by the windings of the adjacent two teeth of the same phase is the largest, and the combined potential generated by the whole phase winding is the largest.

[0059] In some embodiments, the main winding inlet end of the U phase, the main winding inlet end of the V phase and the main winding inlet end of the W phase are star-connected as a common end; the main winding outlet end of the U phase, the auxiliary winding inlet end of the U phase and the auxiliary winding outlet end of the W phase are connected as the U phase lead-out line; the main winding outlet end of the V phase, the auxiliary winding inlet end of the V phase and the auxiliary winding outlet end of the U phase are connected as the V phase lead-out line; and the main winding outlet end of the W phase, the auxiliary winding inlet end of the W phase and the auxiliary winding outlet end of the V phase are connected as the W phase lead-out line.

[0060] The main winding inlet end UZJ of the U phase, the main winding inlet end VZJ of the V phase and the main winding inlet end WZJ of the W phase are star-connected as a common end. The main winding outlet end UZC of the U phase, the auxiliary winding inlet end UFJ of the U phase and the auxiliary winding outlet end WFC of the W phase are connected as the U phase lead-out line; the main winding outlet end VZC of the V phase, the auxiliary winding inlet end VFJ of the V phase and the auxiliary winding outlet end UFC of the U phase are connected as the V phase lead-out line; and the main winding outlet end WZC of the W phase, the auxiliary winding inlet end WFJ of the W phase and the auxiliary winding outlet end VFC of the V phase are connected as the W phase lead-out line.

[0061] In the same set of motors, half of the windings are star-connected and the other half of the windings are finally connected in parallel, so that the back electromotive force and the motor efficiency can be improved without changing the symmetry of the magnetic circuit. The stator structure of the present application adopts double-sided winding and wire passing, so that the existing frame can be directly used, the frame mold cost is reduced, and the double-sided winding makes the rear end connection simpler.

[0062] The stator structure of the present application utilizes the mutual cooperation between the main winding and the auxiliary winding, so that different back electromotive force requirements can be realized by setting the number of turns of the main winding and the auxiliary winding, and the main winding and the auxiliary winding passing part are divided into two frames, and each frame only needs to pass a wire once, so that the interphase crossing during wire passing is effectively avoided, and the structure of the frame is greatly simplified.

[0063] In the stator structure of the present application, the stator core adopts 12 winding teeth, and the 12 winding teeth are the same, and the direction and the composition of the teeth contained by each phase are not unique. The embodiment of the stator structure of the present application gives one of the optimal connection modes.

[0064] The present application also provides a motor comprising the above-mentioned stator structure.

[0065] The present application also provides a compressor comprising the above-mentioned stator structure.

[0066] It is easy for those skilled in the art to understand that the advantageous technical features of the above-mentioned modes can be freely combined and superimposed without conflict.

[0067] The above description is only the preferred embodiment of the present application, and is not used to limit the present application, any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the protection scope of the present application. The above description is only the preferred embodiment of the present application, and it should be pointed out that, for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and variations can be made, and these improvements and variations should be considered as the protection scope of the present application.

Claims

1. A stator structure, characterized by: The application relates to a stator core, which comprises a plurality of winding teeth, a cross section of the stator core being a projection plane, the stator core being divided into six identical areas along a circumferential direction, two oppositely arranged areas in the six areas forming a phase winding, the phase winding comprising a main winding and a sub-winding, the main winding being composed of oppositely arranged first teeth (1) and second teeth (2), and the sub-winding being composed of oppositely arranged third teeth (3) and fourth teeth (4); the first teeth (1) are wired at one end of the stator core, then wired through the second teeth (2), the third teeth (3) are wired at the other end of the stator core, then wired through the fourth teeth (4); the main winding and the sub-winding comprise an inlet end, a winding part, a wire passing part and an outlet end, the main winding adopts star connection, the sub-winding adopts angle connection, and the main winding and the sub-winding of each phase are connected in parallel. The three-phase winding comprises a U-phase winding, a W-phase winding and a V-phase winding, the outlet end of the main winding of the U-phase winding, the inlet end of the sub-winding of the U-phase winding and the outlet end of the sub-winding of the W-phase winding are connected, serving as the U-phase winding outlet wire; the outlet end of the main winding of the V-phase winding, the inlet end of the sub-winding of the V-phase winding and the outlet end of the sub-winding of the U-phase winding are connected, serving as the V-phase winding outlet wire; and the outlet end of the main winding of the W-phase winding, the inlet end of the sub-winding of the W-phase winding and the outlet end of the sub-winding of the V-phase winding are connected, serving as the W-phase winding outlet wire. Or, the three-phase winding comprises a U-phase winding, a W-phase winding and a V-phase winding, the outlet end of the main winding of the U-phase winding, the inlet end of the sub-winding of the U-phase winding and the outlet end of the sub-winding of the V-phase winding are connected, serving as the U-phase winding outlet wire; the outlet end of the main winding of the V-phase winding, the inlet end of the sub-winding of the V-phase winding and the outlet end of the sub-winding of the W-phase winding are connected, serving as the V-phase winding outlet wire; and the outlet end of the main winding of the W-phase winding, the inlet end of the sub-winding of the W-phase winding and the outlet end of the sub-winding of the U-phase winding are connected, serving as the W-phase winding outlet wire. One end of the stator core is provided with a first framework, the other end of the stator core is provided with a second framework, and the first framework and the second framework are of the same structure.

2. The stator structure of claim 1, wherein: The main winding is wired from the back side of the stator core, the first teeth (1) are wired, then wired through the first framework to the second teeth (2) for wiring, the second teeth (2) are wired, then wired from the other end of the stator core, the third teeth (3) are wired, then wired through the second framework to the fourth teeth (4) for wiring, and the fourth teeth (4) are wired, then wired from one end of the stator core.

3. The stator structure of claim 2, wherein: The inlet ends of the three-phase main windings are connected in star connection as a common end, the outlet wires of the three-phase main windings are arranged at the other end of the stator core, and the common end is arranged at one end of the stator core.

4. The stator structure of claim 1, wherein: ​ 5. The stator structure of claim 1, wherein: The main winding is composed of the winding wound on the first tooth (1) and the winding wound on the second tooth (2) in series; the auxiliary winding is composed of the winding wound on the third tooth (3) and the winding wound on the fourth tooth (4) in series.

6. The stator structure of claim 1, wherein: The first tooth (1) of the three-phase main winding is spaced 120 degrees apart along the circumference of the stator core; the third tooth (3) of the three-phase auxiliary winding is spaced 120 degrees apart.

7. The method of winding a stator structure according to any one of claims 1 to 6, characterized in that: When the one end of the stator core is provided with a first skeleton and the other end of the stator core is provided with a second skeleton, the three-phase winding is a U-phase, a W-phase and a V-phase; The main winding of the U-phase is wound from the incoming end, wound on the first tooth (1) counterclockwise, passed through the first skeleton and wound on the second tooth (2) clockwise, and ended at the outgoing end; the main winding of the V-phase is wound from the incoming end, wound on the first tooth (1) counterclockwise, passed through the first skeleton and wound on the second tooth (2) clockwise, and ended at the outgoing end; the main winding of the W-phase is wound from the incoming end, wound on the first tooth (1) counterclockwise, passed through the first skeleton and wound on the second tooth (2) clockwise, and ended at the outgoing end.

8. The winding method of the stator structure according to claim 7, characterized in that: The auxiliary winding of the U-phase is wound from the incoming end, wound on the third tooth (3) clockwise, passed through the second skeleton and wound on the fourth tooth (4) counterclockwise, and ended at the outgoing end; the auxiliary winding of the V-phase is wound from the incoming end, wound on the third tooth (3) clockwise, passed through the second skeleton and wound on the fourth tooth (4) counterclockwise, and ended at the outgoing end; the auxiliary winding of the W-phase is wound from the incoming end, wound on the third tooth (3) clockwise, passed through the second skeleton and wound on the fourth tooth (4) counterclockwise, and ended at the outgoing end.

9. An electric machine characterized by The stator structure according to any one of claims 1 to 6.

10. A compressor characterized by, The stator structure according to any one of claims 1 to 6.

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