CN217388331U

CN217388331U - Distributed winding sine brushless permanent magnet motor

Info

Publication number: CN217388331U
Application number: CN202220526187.9U
Authority: CN
Inventors: 李勇
Original assignee: Suzhou Bote Motor Co ltd
Current assignee: Suzhou Bote Motor Co ltd
Priority date: 2022-03-11
Filing date: 2022-03-11
Publication date: 2022-09-06
Anticipated expiration: 2032-03-11

Abstract

The utility model discloses a sinusoidal brushless permanent-magnet machine of distributed winding, including binding post, terminal sheath, neutral point insulation, phase-to-phase insulation, stator winding, stator core, tank bottom insulation, capping insulation, a rotor end plate, rotor core, electromagnetism piece, rivet and No. two rotor end plates. The utility model discloses a distributed winding sine brushless permanent magnet motor, which selects the special pole slot matching and carries out the structure optimization design on the air gap magnetic field of the motor through the targeted structure design, and comprises a stator tooth yoke part structure and a rotor layout structure; the stator internal diameter adopts the tooth portion to dig the inhomogeneous design of round hole structure, and the rotor adopts "concora crush" back "bow" shape new construction inhomogeneous air gap design that varies, and the air gap is partial to vary after the stator rotor cooperation, and the circumference array can have effectively weakens the tooth's socket torque, lets the product back electromotive force wave form more approach and sine simultaneously, is favorable to the promotion of efficiency and reduces the vibration.

Description

Distributed winding sine brushless permanent magnet motor

Technical Field

The utility model relates to the field of electric machines, in particular to sinusoidal brushless permanent-magnet machine of distributed winding.

Background

A brushless permanent magnet motor is a supporting device for current control, the technical route diagram 2.0 of energy-saving and new energy vehicles published by the Chinese automobile engineering society at the day ago indicates that the new energy vehicles are sold by more than 20%, 40% and 50% of the total sales of the vehicles in 2025, 2030 and 2035, and a phi 9430 slot 10-pole distributed winding compressor motor is developed to meet the follow-up requirements of the market so as to meet the requirements of a new energy heat management system with large discharge, high demand and low noise.

The existing brushless permanent magnet motor has certain defects when in use, firstly, the comprehensive efficiency of the existing motor can be lower when in work, the existing motor can not be well promoted and is not beneficial to people to use, in addition, the radial force of a stator is relatively large, the high-frequency vibration can not be effectively inhibited, the NVH can not be well improved, certain adverse effects are brought to the use process of people, and therefore, the distributed winding sine brushless permanent magnet motor is provided.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Aiming at the defects of the prior art, the utility model provides a distributed winding sine brushless permanent magnet motor, which selects the specific pole slot matching and carries out the structure optimization design on the air gap magnetic field of the motor by the targeted structure design, and comprises a stator tooth yoke part structure and a rotor layout structure; the stator internal diameter adopts tooth portion to dig the inhomogeneous design of round hole structure, and the rotor adopts "concora crush" back "bow" shape new construction inhomogeneous air gap design that varies, and the air gap is partial to vary after the cooperation of stator and rotor, and the circumference array can have effectively weakens the tooth's socket torque, lets the product back electromotive force wave form more approach and sine simultaneously, is favorable to the promotion of efficiency and reduces the vibration, can effectively solve the problem among the background art.

(II) technical scheme

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a sinusoidal brushless permanent-magnet machine of distributed winding, includes binding post, terminal sheath, neutral point insulation, alternate insulation, stator winding, stator core, tank bottom insulation, capping insulation, a rotor end plate, rotor core, electromagnetic block, rivet and No. two rotor end plates, stator winding is located rotor core's outer wall, the tank bottom insulation is located stator winding's outer wall position with capping insulation, stator core is located the insulating outside position of tank bottom, alternate insulation is located stator winding's front and back both ends position, binding post is located stator core's outside position, the terminal sheath is located binding post's outside position, the electromagnetic block is located rotor core's surface, a rotor end plate and No. two rotor end plates are located rotor core's front and back both ends respectively.

As an optimal technical scheme of this application, binding post is connected with the wire, the connector is installed with the position that the wire is connected to binding post, binding post erection joint's position location has the locating rack, be provided with the system's terminal on the binding post, the sheath mount pad is installed in the outside of terminal sheath, stator core's outer wall is provided with the stator mounting groove.

As this application a preferred technical scheme, stator winding's one end fixedly connected with winding piece, stator winding's the other end fixedly connected with winding piece No. two, the iron core groove has been seted up to rotor core's inner wall, the rotor core outside is provided with the constant head tank, the insulating inboard of tank bottom is provided with the connection fastener, rotor core's outer wall connection has the iron core board, the screens groove has been seted up between the iron core board.

As this application an preferred technical scheme, stator winding and tank bottom are insulating, the capping is insulating between fixes a position, the draw-in groove has been seted up to stator core's inner wall, the tank bottom is insulating to be fixed a position at stator core's inner wall position through the draw-in groove and to assemble with stator winding, fix a position between stator winding's both ends and the alternate insulation, assemble between binding post and the terminal sheath.

As an optimal technical scheme of this application, electromagnetic connection between binding post, connector, the wire, fix a position the equipment through the locating rack between binding post and the connector, fix a position between binding post and the system's terminal, integrated into one piece between stator core and the stator mounting groove.

As an optimal technical scheme of this application, the block location between stator winding and tank bottom insulation, the capping insulation, location equipment between stator winding and a winding piece, No. two winding pieces, integrated into one piece between rotor core and the iron core groove, assemble between rotor core and the screens groove.

As an optimal technical scheme of this application, stator core adopts distributed winding structure, and 30 grooves altogether of stator core internal coil, adopts the individual layer to lap and wind parallel structure all the way, the pitch of each groove is 3 in the 30 grooves, and adopts stranded copper line to go around the rule structure.

As an optimal technical scheme of this application, binding post connecting wire, and binding post are the copper product punching press then carry out zinc-plated processing anticorrosive molding, the terminal sheath is the resin integrated into one piece that moulds plastics, and the position of terminal sheath is peculiar buckle structure.

(III) advantageous effects

Compared with the prior art, the utility model provides a sinusoidal brushless permanent-magnet machine of distributed winding possesses following beneficial effect: the distributed winding sine brushless permanent magnet motor adopts the specific pole slot matching and the targeted structural design to carry out the structural optimization design on the air gap magnetic field of the motor, and comprises a stator tooth yoke part structure and a rotor layout structure; the inner diameter of the stator adopts a non-uniform design of a tooth part circular hole digging structure, the rotor adopts a non-uniform unequal air gap design of a new structure of a 'flat cut' back inverse 'arch', the air gaps are locally unequal after the stator and the rotor are matched, a circumferential array can effectively weaken the cogging torque, simultaneously enable the waveform of the back electromotive force of a product to be closer to sine, be beneficial to improving the efficiency and reducing the vibration, analyze the back electromotive force fundamental wave amplitude, the 5-order harmonic component ratio, the harmonic distortion rate, the cogging torque and the no-load back electromotive force of the motor through finite element analysis, determine the magnetic field layout of the motor, analyze the synchronous reactance of a direct axis and a quadrature axis of the motor according to experimental comparison data, analyze the electromagnetic torque and the reluctance torque of the motor, structurally design and optimize the magnetic steel width of the motor rotor and the yoke part in order to improve the anti-interference capability of the motor under the fluctuating load, and improve the performance and the anti-interference capability of the motor, because of peculiar pole slot cooperation, and the structural design of pertinence, the back electromotive force wave form is sinusoidal smooth-going, and the comprehensive efficiency of motor efficiency is up to 92.68% under 3600rpm-6Nm operating mode, and efficiency promotion is obvious, and the radial power of stator is less relatively, and high-frequency vibration obtains effective suppression, and NVH has obvious improvement, and whole brushless permanent magnet motor simple structure, convenient operation, the effect of use is better for traditional mode.

Drawings

Fig. 1 is the overall structure schematic diagram of the distributed winding sine brushless permanent magnet motor of the present invention.

Fig. 2 is a schematic structural diagram of an exploded view of a distributed winding sine brushless permanent magnet motor according to the present invention.

Fig. 3 is the structural schematic diagram of the rotor core decomposition in the distributed winding sine brushless permanent magnet motor of the present invention.

Fig. 4 is a schematic structural diagram of a stator winding in a distributed winding sine brushless permanent magnet motor according to the present invention.

Fig. 5 is a schematic structural diagram of a rotor core in a distributed winding sine brushless permanent magnet motor according to the present invention.

Fig. 6 is a schematic structural diagram of a wiring terminal in the distributed winding sine brushless permanent magnet motor of the present invention.

In the figure: 1. a wiring terminal; 2. a terminal sheath; 3. neutral point insulation; 4. interphase insulation; 5. a stator winding; 6. a stator core; 7. the bottom of the groove is insulated; 8. insulating the groove cover; 9. a first rotor end plate; 10. a rotor core; 11. an electromagnetic block; 12. riveting; 13. a second rotor end plate; 14. a wire; 15. a sheath mounting base; 16. positioning a groove; 17. a first winding sheet; 18. an iron core groove; 19. winding sheet number two; 20. an iron core plate; 21. a clamping groove; 22. a positioning frame; 23. a connector; 24. a system wiring terminal; 25. connecting the clamping piece; 26. and a stator mounting groove.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings and detailed description, but those skilled in the art will understand that the following described embodiments are some, not all, of the embodiments of the present invention, and are only used for illustrating the present invention, and should not be construed as limiting the scope of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. The examples, in which specific conditions are not specified, were carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The first embodiment is as follows:

as shown in fig. 1-6, a distributed winding sine brushless permanent magnet motor comprises a wiring terminal 1, a terminal sheath 2, a neutral point insulation 3, an interphase insulation 4, a stator winding 5 and a stator core 6, tank bottom is insulating 7, capping is insulating 8, rotor end plate 9, rotor core 10, electromagnetism piece 11, rivet 12 and No. two rotor end plates 13, stator winding 5 is located rotor core 10's outer wall, tank bottom is insulating 7 and capping is insulating 8 is located stator winding 5's outer wall position, stator core 6 is located the outside position of tank bottom is insulating 7, phase-to-phase insulation 4 is located stator winding 5's front and back both ends position, binding post 1 is located stator core 6's outside position, terminal sheath 2 is located binding post 1's outside position, electromagnetism piece 11 is located rotor core 10's surface, rotor end plate 9 and No. two rotor end plates 13 are located rotor core 10's front and back both ends respectively.

Furthermore, the stator winding 5 is positioned between the stator winding and the slot bottom insulation 7 and between the stator winding and the slot cover insulation 8, a clamping slot is formed in the inner wall of the stator core 6, the slot bottom insulation 7 is positioned on the inner wall of the stator core 6 through the clamping slot and assembled with the stator winding 5, the two ends of the stator winding 5 are positioned between the phase-to-phase insulation 4, and the wiring terminal 1 and the terminal sheath 2 are assembled.

Further, the stator core 6 adopts a distributed winding structure, the number of coils in the stator core 6 is 30, a single-layer lap winding one-way parallel structure is adopted, the pitch of each slot in the 30 slots is 3, and a multi-strand copper wire parallel winding wire embedding structure is adopted.

Further, binding post 1 connects wire 14, and binding post 1 is the copper product punching press then carries out zinc-plating and handles anticorrosive shaping, and terminal sheath 2 is the resin integrated into one piece that moulds plastics, and terminal sheath 2's position is the unique buckle structure.

Example two:

on the basis of the first embodiment, as shown in fig. 1-6, a distributed winding sine brushless permanent magnet motor comprises a wiring terminal 1, a terminal sheath 2, a neutral point insulation 3, an interphase insulation 4, a stator winding 5 and a stator iron core 6, tank bottom is insulating 7, capping is insulating 8, rotor end plate 9, rotor core 10, electromagnetism piece 11, rivet 12 and No. two rotor end plates 13, stator winding 5 is located rotor core 10's outer wall, tank bottom is insulating 7 and capping is insulating 8 is located stator winding 5's outer wall position, stator core 6 is located the outside position of tank bottom is insulating 7, phase-to-phase insulation 4 is located stator winding 5's front and back both ends position, binding post 1 is located stator core 6's outside position, terminal sheath 2 is located binding post 1's outside position, electromagnetism piece 11 is located rotor core 10's surface, rotor end plate 9 and No. two rotor end plates 13 are located rotor core 10's front and back both ends respectively.

Furthermore, the wiring terminal 1 is connected with a wire 14, a connector 23 is installed at a position where the wiring terminal 1 is connected with the wire 14, a positioning frame 22 is positioned at a position where the connector 23 is installed on the wiring terminal 1, a system wiring terminal 24 is arranged on the wiring terminal 1, a sheath installation seat 15 is installed on the outer side of the terminal sheath 2, and a stator installation groove 26 is formed in the outer wall of the stator core 6.

Furthermore, the wiring terminal 1, the connector 23 and the lead 14 are electromagnetically connected, the wiring terminal 1 and the connector 23 are positioned and assembled through the positioning frame 22, the wiring terminal 1 and the system wiring terminal 24 are positioned, and the stator core 6 and the stator mounting groove 26 are integrally formed.

Example three:

on the basis of the first embodiment and the second embodiment, as shown in fig. 1-6, a distributed winding sine brushless permanent magnet motor comprises a wiring terminal 1, a terminal sheath 2, a neutral point insulation 3, an interphase insulation 4, a stator winding 5 and a stator iron core 6, tank bottom is insulating 7, capping is insulating 8, rotor end plate 9, rotor core 10, electromagnetism piece 11, rivet 12 and No. two rotor end plates 13, stator winding 5 is located rotor core 10's outer wall, tank bottom is insulating 7 and capping is insulating 8 is located stator winding 5's outer wall position, stator core 6 is located the outside position of tank bottom is insulating 7, phase-to-phase insulation 4 is located stator winding 5's front and back both ends position, binding post 1 is located stator core 6's outside position, terminal sheath 2 is located binding post 1's outside position, electromagnetism piece 11 is located rotor core 10's surface, rotor end plate 9 and No. two rotor end plates 13 are located rotor core 10's front and back both ends respectively.

Further, one end of the stator winding 5 is fixedly connected with a winding sheet 17, the other end of the stator winding 5 is fixedly connected with a winding sheet 19, an iron core groove 18 is formed in the inner wall of the rotor core 10, a positioning groove 16 is formed in the outer side of the rotor core 10, a connecting clamping piece 25 is arranged on the inner side of the groove bottom insulation 7, an iron core plate 20 is connected to the outer wall of the rotor core 10, and a clamping groove 21 is formed between the iron core plates 20.

Furthermore, the stator winding 5 is clamped and positioned with the slot bottom insulation 7 and the slot cover insulation 8, the stator winding 5 is positioned and assembled with the first winding sheet 17 and the second winding sheet 19, the rotor core 10 and the core slot 18 are integrally formed, and the rotor core 10 and the clamping slot 21 are assembled.

The working principle is as follows: the utility model comprises a wiring terminal 1, a terminal sheath 2, a neutral point insulator 3, an interphase insulator 4, a stator winding 5, a stator core 6, a tank bottom insulator 7, a tank cover insulator 8, a rotor end plate 9, a rotor core 10, an electromagnetic block 11, a rivet 12, a rotor end plate 13, a lead 14, a sheath mounting seat 15, a positioning groove 16, a winding sheet 17, an iron core groove 18, a winding sheet 19, an iron core plate 20, a clamping groove 21, a positioning frame 22, a connector 23, a system wiring terminal 24, a connecting clamping piece 25 and a stator mounting groove 26, wherein when in use, the wiring terminal 1 is applied for the connection of the lead 14, is mainly formed by copper material punching and then galvanized for corrosion resistance, one section of the wiring terminal is connected with the conductor 14, the other section of the wiring terminal 24 of the motor control system is connected with the power-on performance and safety, the terminal sheath 2 is a terminal external insulation fixing mechanism, the motor is integrally molded by resin injection molding, has good insulating property and good plasticity, can be designed into a primary special buckle structure, a terminal cavity position with stable internal stroke fixes a terminal, the outer side can be fixed with a stator mounting groove 26 to enable the whole mechanism to be integrated, a neutral point insulator 3 is a motor neutral connection point insulator, the middle point is used as a phase line 'common point' in the motor, the damage of a membrane can be caused in the manufacturing process, so that the independent insulation protection is needed to be added, the integral safety performance of the product is improved, an interphase insulator 4 is used as one of the insulation components between the motor phase and the phase to ensure that the motor has enough insulation strength and insulation distance, a stator winding 5 is a core component of the motor, is a generation source of electromagnetic induction, is a main component for converting electricity into magnetism in Faraday electromagnetic induction, and comprises a plurality of coils or coil groups to form a phase or a whole electromagnetic circuit, the stator core 6 is used as a part of a motor magnetic circuit and is provided with a stator winding, in order to reduce eddy current and hysteresis loss caused by alternating magnetic potential in the core, the core material is laminated by adopting silicon steel sheets with different thicknesses according to requirements, each silicon steel sheet is connected through a self-buckling point, openings are formed in two sides and are matched with a framework for installation, a tank bottom insulator 7 is used as one of insulation components between the motor winding and the core and is in insulation fit with a tank cover to coat a whole coil, the motor is ensured to have enough insulation strength and insulation distance, the tank cover insulator 8 is used as one of insulation components between the motor winding and the core and is in insulation fit with the tank bottom to coat the whole coil to ensure that the motor has enough insulation strength and insulation distance, a rotor end plate 9 is riveted to play a role in strengthening, the rotor core is prevented from warping, meanwhile, a rotor electromagnetic block is prevented from being thrown out in the operation process, and a rotor core 10 is used as a part of the motor magnetic circuit and is provided with the rotor electromagnetic block, in order to reduce eddy current and hysteresis loss caused by alternating magnetic potential in an iron core, the iron core material is formed by stacking silicon steel sheets with different thicknesses according to requirements, each silicon steel sheet is connected through a self-buckling point, a middle opening is formed in the middle of each silicon steel sheet, weight reduction/ventilation are facilitated, cooling is facilitated, each part of a rotor is connected through a rivet, an electromagnetic block 11 is used for calling magnetic materials with high magnetic field intensity, an electric vehicle motor adopts neodymium iron boron rare earth magnetic steel, each rivet 12 is a rotor fixing piece and is used for fixing each part of the rotor, a special polar slot is selected for matching, and a structure optimization design is carried out on an air gap magnetic field of the motor through a targeted structural design, and the electric vehicle motor comprises a stator tooth yoke structure and a rotor layout structure; the stator internal diameter adopts the non-uniform design of tooth portion excavation round hole structure, the rotor adopts the non-uniform unequal air gap design of "flat cut" back "bow" shape new construction, the air gap is partial inequality after the stator rotor cooperation, the circumference array, can have effective weakening tooth's socket torque, let product back electromotive force waveform more approach and sine simultaneously, be favorable to the promotion of efficiency and reduce vibration, through the back electromotive force fundamental wave amplitude of finite element analysis motor, 5 times harmonic component account for ratio, harmonic distortion rate, tooth's socket torque and no-load back electromotive force, etc. confirm motor magnetic field overall arrangement.

It is noted that, herein, relational terms such as first and second (a, b, etc.) and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only illustrative of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the present invention, and all such changes and modifications fall within the scope of the present invention as claimed.

Claims

1. The utility model provides a sinusoidal brushless permanent-magnet machine of distributed winding, includes binding post (1), terminal sheath (2), neutral point insulation (3), phase insulation (4), stator winding (5), stator core (6), tank bottom insulation (7), tank cover insulation (8), a rotor end plate (9), rotor core (10), electromagnetism piece (11), rivet (12) and No. two rotor end plates (13), its characterized in that: stator winding (5) are located the outer wall of rotor core (10), the tank bottom is insulating (7) and the outer wall position that the capping is insulating (8) is located stator winding (5), stator core (6) are located the outside position of tank bottom is insulating (7), both ends position around phase-to-phase insulation (4) are located stator winding (5), binding post (1) are located the outside position of stator core (6), terminal sheath (2) are located the outside position of binding post (1), electromagnetism piece (11) are located the surface of rotor core (10), rotor end plate (9) and No. two rotor end plates (13) are located the front and back both ends of rotor core (10) respectively.

2. A distributed winding sinusoidal brushless permanent magnet machine according to claim 1, wherein: binding post (1) is connected with wire (14), connector (23) are installed to the position that binding post (1) and wire (14) are connected, the position location of binding post (1) installation connector (23) has locating rack (22), be provided with system's terminal (24) on binding post (1), sheath mount pad (15) are installed in the outside of terminal sheath (2), the outer wall of stator core (6) is provided with stator mounting groove (26).

3. A distributed winding sinusoidal brushless permanent magnet electric machine according to claim 1, wherein: the utility model discloses a stator winding (5) is characterized in that one end fixedly connected with winding piece (17) of stator winding (5), No. two winding pieces (19) of other end fixedly connected with of stator winding (5), iron core groove (18) have been seted up to the inner wall of rotor core (10), the rotor core (10) outside is provided with constant head tank (16), the inboard of tank bottom insulation (7) is provided with connects fastener (25), the outer wall connection of rotor core (10) has iron core board (20), screens groove (21) have been seted up between iron core board (20).

4. A distributed winding sinusoidal brushless permanent magnet electric machine according to claim 1, wherein: the stator winding (5) is positioned between the stator winding and the tank bottom insulation (7) and the tank cover insulation (8), the clamping groove is formed in the inner wall of the stator core (6), the tank bottom insulation (7) is positioned on the inner wall of the stator core (6) through the clamping groove and assembled with the stator winding (5), the two ends of the stator winding (5) are positioned between the two ends of the stator winding and the phase insulation (4), and the wiring terminal (1) and the terminal sheath (2) are assembled.

5. A distributed winding sinusoidal brushless permanent magnet electric machine according to claim 2, wherein: electromagnetic connection between binding post (1), connector (23), wire (14), fix a position the equipment through locating rack (22) between binding post (1) and connector (23), fix a position between binding post (1) and system's terminal (24), integrated into one piece between stator core (6) and stator mounting groove (26).

6. A distributed winding sinusoidal brushless permanent magnet electric machine according to claim 3, wherein: the stator winding (5) and the slot bottom are insulated (7), the slot cover is insulated (8), the stator winding (5) and the first winding sheet (17), the second winding sheet (19) are positioned and assembled, the rotor core (10) and the core slot (18) are integrally formed, and the rotor core (10) and the clamping slot (21) are assembled.

7. A distributed winding sinusoidal brushless permanent magnet electric machine according to claim 1, wherein: stator core (6) adopt distributed winding structure, and stator core (6) internal coil is 30 grooves altogether, adopts the individual layer to lap and winds the parallelly connected structure of the same way, the pitch in 30 grooves in each groove is 3, and adopts stranded copper line duplex winding rule structure.

8. A distributed winding sinusoidal brushless permanent magnet electric machine according to claim 1, wherein: binding post (1) connecting wire (14), and binding post (1) are the copper product punching press then carry out zinc-plating and handle anticorrosive shaping, terminal sheath (2) are the resin integrated into one piece that moulds plastics, and the position of terminal sheath (2) is special buckle structure.