CN110829629A - Motor stator and motor - Google Patents

Abstract

The invention provides a motor stator and a motor, wherein the motor stator comprises: a plurality of stator modules that splice along circumference, stator module includes: an arcuate stator yoke; a plurality of stator teeth which can be assembled on the arc-shaped stator yoke along the circumferential direction in a matching way and can extend towards the axis of the arc-shaped stator yoke; stator winding encircles on arc stator yoke portion along circumference, and stator winding can be around establishing to the arc surface region that is close to the axle center after the arc surface that keeps away from the axle center on along arc stator yoke portion extends to can pass the stator tooth, wherein, through two adjacent arc stator yoke portions along circumference end to end concatenation, form a plurality of stator module along the circumference concatenation. By the technical scheme, the axial size of the motor can be reduced, and the internal capacity of electric equipment such as a washing machine and the like can be improved by saving space.

Description

Motor stator and motor

technical field

The present invention relates to the field of motors, in particular, to a motor stator and a motor.

Background technique

For a motor used in a washing machine with direct drive technology, the axial size of the motor is required to be as small as possible, so that the washing capacity can be increased without increasing the size of the washing machine too much.

As shown in FIG. 1 , in the related art, most of the direct-drive motors of washing machines use an outer rotor radial flux motor. The axial physical air gap between the inner stators 20 and the unavoidable winding ends make it impossible to make thin, and the motor too thick will also lead to an increase in the axial installation size, which cannot save space for increasing the capacity of the washing machine.

As for the transverse flux motor, although it has a high torque density, the process is more complicated and the manufacturing cost is high. The traditional transverse flux motor has a modular configuration along its axial direction. Each module is a phase, and each phase winding is annular. The total axial length of the motor is equal to the sum of the axial lengths of all modules. When the motor is used, the thickness of the motor is still large.

SUMMARY OF THE INVENTION

In order to solve at least one of the above technical problems, an object of the present invention is to provide a motor stator.

Another object of the present invention is to provide a motor.

In order to achieve the above purpose, the technical solution of the first aspect of the present invention provides a motor stator, comprising: a plurality of stator modules spliced along a circumferential direction, the stator module comprising: an arc-shaped stator yoke; It is assembled on the arc-shaped stator yoke and can extend to the axial center of the arc-shaped stator yoke; the stator winding is circumferentially surrounded on the arc-shaped stator yoke, and the stator winding can be arranged along the arc-shaped stator yoke. The arc surface away from the axis is extended and then wound to the arc surface area close to the axis, and can pass through the stator teeth. Circumferentially spliced stator modules.

In this technical solution, a motor stator formed by splicing a plurality of stator modules arranged in the circumferential direction is used as the motor stator of the transverse flux motor, and each stator module includes an arc-shaped stator yoke and is assembled on the arc-shaped stator yoke. The stator windings are wound along the circumferential contour perpendicular to the axial direction on the arc-shaped stator yoke, and can pass through the plurality of stator teeth in the circumferential direction. The physical distance can realize the adjustment of the phase difference of the induced voltage of the stator winding on each stator module, so as to obtain a transverse flux motor with the required number of phases, such as a two-phase, three-phase, or multi-phase motor, which is similar to the prior art. The stator modules are arranged in the axial direction, and the number of phases is increased by increasing the number of stator modules (that is, increasing the axial size of the motor stator). Compared with the axial size of the motor stator in this application, the axial size is only equivalent to The axial size of the stator of a one-phase motor can reduce the axial size of the motor. For electrical equipment such as washing machines, the internal capacity can be increased by saving space; On the other hand, since the stator windings are wound along the circumferential contour perpendicular to the axial direction on the arc-shaped stator yoke, they will not protrude from the end face of the stator yoke, which is also beneficial to the overall thinning of the motor.

Among them, the stator teeth are assembled on the arc-shaped stator yoke, which can be realized in various forms. For example, the stator teeth and the arc-shaped stator yoke can be assembled by butt joint in the radial direction, or can be assembled by nesting each other.

In addition, the insulation between the stator winding, the stator yoke and the stator teeth can be achieved by using slot paper, or by using an insulating frame.

In addition, the stator tooth punching sheet in the above-mentioned technical solution provided by the present invention may also have the following additional technical features:

In the above technical solution, preferably, the stator teeth include: a tooth waist; a tooth root, which is disposed at one end of the tooth waist, and includes a fixing slot formed by two side walls that extend along the axial direction of the arc-shaped stator yoke; The claw portion is arranged on the other end of the tooth waist and extends in the same direction as the fixing slot, wherein the stator teeth and the arc-shaped stator yoke are assembled together by fitting the arc-shaped stator yoke portion in the fixing slot.

In this technical solution, the stator teeth are assembled on the arc-shaped stator yoke by opening a fixed slot at the root of the stator teeth, and the fixed slot is matched with the stator yoke, so that the stator teeth and the arc-shaped stator yoke can be assembled between the stator teeth and the arc-shaped stator yoke. At the same time, the thickness or height of the stator yoke can be set as small as possible, so as to meet the preparation requirements of driving motors in electrical equipment such as washing machines.

In addition, each stator tooth may include a tooth root portion, a tooth waist portion and a tooth claw portion, and each stator tooth may include a tooth root portion, a tooth waist portion and a tooth claw portion, and the tooth root portion is used for connecting with the stator yoke. The inner wall of the tooth waist part surrounds the arrangement space for forming the windings, and the tooth claw part can be arranged in the circumferential direction to form a circumferential matching surface matched with the motor rotor.

In any of the above technical solutions, preferably, the fixing grooves on the two adjacent stator teeth are arranged in opposite directions on the arc-shaped stator yoke, so that the two adjacent stator teeth are arranged in opposite directions in the axial direction, wherein , a passing area for forming the stator winding can be surrounded between two adjacent stator teeth, so that the stator winding extends circumferentially along the inner side wall of the tooth waist.

In this technical solution, the two adjacent stator teeth are axially reversed, so that the two adjacent stator teeth can achieve the axial limit of the stator winding, so that the stator can be seen from the entire stator module. After the winding is wound along the outer arc surface, it is wound in the opposite direction after passing through the side wall of the end of the stator yoke. The claws of the two adjacent stator teeth are used to limit the radial position of the stator winding. Through the axial limit and the radial limit, the setting accuracy of the stator winding in the circumferential direction is ensured. In turn, it is beneficial to improve the performance of the motor.

In any of the above technical solutions, preferably, the stator teeth are formed by a plurality of stator tooth punching pieces in a circumferentially superimposed structure.

In this technical solution, the stator teeth are formed in the form of stator tooth punching pieces, and then the stator core structure is formed in combination with the stator yoke structure. Compared with the transverse flux motor or claw motor using solid teeth, the Core losses are reduced without the need to increase the cost of major process improvements.

In any of the above technical solutions, preferably, the outer side wall and the inner side wall of the arc-shaped stator yoke are respectively formed by a multi-section straight surface splicing structure along the circumferential direction.

In this technical solution, the part of the arc-shaped stator yoke that is matched with the fixing slot is a straight-face structure, so as to realize the fitting between the fixing slot and the stator yoke, which is beneficial to improve the stability of the assembled motor stator. strength.

In any of the above technical solutions, preferably, the outer side wall and the inner side wall of the arc-shaped stator yoke are circular arc surfaces, and the area on the circular arc surface that is matched with the stator teeth is provided with recesses to form the side walls of the fixing slot. Slot structure.

In this technical solution, a slot structure is provided on the arc-shaped stator yoke to cooperate with the two side walls of the fixing slot respectively, so as to realize the circumferential positioning of the stator teeth. Stability of motor stator assembly.

In any of the above technical solutions, preferably, the arc-shaped stator yoke is formed by stacking a plurality of stator yoke punching pieces in the axial direction.

In any of the above technical solutions, preferably, the cross-sectional shape of the fixing groove is configured as any one of a rectangle, a U-shape, and a trapezoid.

In this technical solution, the cross-section of the fixing slot can have various structural forms, and changes with the change of the cross-sectional shape of the stator yoke, so as to meet the setting requirements of different motor stator structures.

Preferably, the cross-sectional shape of the fixing groove is a rectangle or a trapezoid.

In any of the above technical solutions, preferably, the length of the side wall of the fixing groove away from the tooth waist is less than or equal to the length of the side wall close to the tooth waist.

In this technical solution, the side wall away from the tooth waist is mainly used to cooperate with the stator yoke and achieve mechanical fixation. At this time, the length of the side wall away from the tooth waist can be less than or equal to the length of the side wall close to the tooth waist. The length of the side wall away from the tooth waist is further reduced to set the length of the side wall to be smaller than the length of the side wall near the tooth waist, which can effectively reduce the quality of the entire motor stator.

As for the side wall close to the tooth waist, a fixing slot is formed in cooperation with the side wall away from the tooth waist to achieve mechanical fixation with the stator yoke, and at the same time, the magnetic field lines transmitted from the tooth waist can be transmitted to the stator yoke. Therefore, by setting the side wall close to the tooth waist as the longer side, the probability of magnetic flux leakage can be effectively reduced.

In any of the above technical solutions, preferably, the thickness of the side wall of the fixing groove away from the tooth waist is less than or equal to the thickness of the side wall close to the tooth waist.

In this technical solution, by setting the thickness of the side wall of the fixing groove away from the tooth waist to be smaller than the thickness of the side wall close to the tooth waist, on the one hand, by defining the thickness of the side wall close to the tooth waist, to ensure that the transmission by the tooth waist The incoming magnetic lines of force are transmitted to the stator yoke, which is beneficial to reduce the probability of magnetic flux leakage. On the other hand, by limiting the thickness of the side wall away from the tooth waist, it is also beneficial to reduce the weight of the motor stator while meeting the strength of the mechanical fixation. .

The technical solution of the second aspect of the present invention provides a motor, comprising: the motor stator according to any technical solution of the first aspect of the present invention; a motor rotor sleeved and assembled with the motor stator, wherein the motor stator is an outer stator.

The motor is specifically a reluctance transverse flux motor.

In this technical solution, by setting the motor rotor as an inner rotor to form an inner rotor reluctance transverse flux motor, compared with an outer rotor motor, there is no need to set a safety gap, and the overall size of the motor can be further reduced.

In the above technical solution, preferably, the motor rotor includes: a plurality of arc-shaped rotor yokes, which can be spliced end-to-end along the circumferential direction to form annular rotor yokes, and the outer arc sidewalls of the arc-shaped rotor yokes are arranged along the circumferential direction There are a plurality of magnetic steel positioning teeth, and a magnetic steel positioning groove is defined between any two adjacent magnetic steel positioning teeth; a plurality of permanent magnets are correspondingly arranged in the magnetic steel positioning groove and can protrude from the magnetic steel positioning groove.

In any of the above technical solutions, preferably, for the adjacent rotor yokes, a splicing groove is provided at the rear end of one, and a splicing tooth structure capable of matching with the splicing groove is provided at the head end of the other.

In this technical solution, a splicing slot and a splicing tooth structure are respectively arranged in the area where the two adjacent rotor yokes are matched, and the precise positioning between the two adjacent stator rotors is realized by the matching between the splicing slot and the splicing tooth structure. assembled.

In any of the above technical solutions, preferably, the motor stator has n stator modules, wherein, when the number of phases of the motor is m, the number of stator modules in each phase is n/m.

In this technical solution, for a motor with n stator modules, the number of phases depends on the number of modules contained in each phase. If the number of modules in each phase is a, and a is an integer not less than 1, then the total number of motor phases m is n/a. When a is 1, each stator module represents a phase, which is arranged in turn in the circumferential direction. The space angle occupied by each phase is equal to the space angle occupied by each module, that is, 360°/n. If a is greater than 1, when arranging in the circumferential direction, firstly arrange the phases in the order of one module per phase. After arranging m windings, repeat the previous arrangement until repeating a times. Potential harmonics and torque ripple, usually set a and m to integers greater than 1.

One or more technical solutions provided in the technical solutions of this application have at least the following technical effects or advantages:

(1) The motor stator formed by splicing a plurality of stator modules arranged in the circumferential direction is used as the motor stator of the transverse flux motor, and each stator module includes an arc-shaped stator yoke and an arc-shaped stator yoke. A plurality of stator teeth, the stator windings are wound along the circumferential contour perpendicular to the axial direction on the arc-shaped stator yoke, and can pass through the plurality of stator teeth in the circumferential direction. On the one hand, by adjusting the physical spacing between the stator modules, Realize the adjustment of the phase difference of the induced voltage of the stator winding on each stator module, so as to obtain a transverse flux motor with a required number of phases, such as a two-phase, three-phase, or multi-phase motor, which is comparable to the stator module in the prior art. Arranged along the axial direction, the number of phases is increased by increasing the number of stator modules (that is, increasing the axial size of the motor stator). Compared with the axial size of the motor stator in this application, the axial size is only equivalent to the one-phase motor in the prior art. The axial size of the stator can be reduced, and the axial size of the motor can be reduced. On the other hand, the characteristics of the large torque density of the transverse flux motor can be retained.

(2) By arranging two adjacent stator teeth in the opposite direction in the axial direction, so that the two adjacent stator teeth can realize the axial limit of the stator winding, so that from the perspective of the entire stator module, the stator winding is in the axial direction. After the outer arc surface is wound, it is wound in the opposite direction after passing through the side wall of the end of the stator yoke, and the tooth waists of the two adjacent stator teeth are located on both sides of the stator winding, so as to limit the stator winding axially. , the claws of the two adjacent stator teeth are used to limit the radial position of the stator winding. Through the axial limit and radial limit, the setting accuracy of the stator winding along the circumferential direction is ensured, which is beneficial to the Improve motor performance.

Additional aspects and advantages of the present invention will become apparent in the description section that follows, or will be learned by practice of the present invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of embodiments taken in conjunction with the accompanying drawings, wherein:

FIG. 1 shows a schematic structural diagram of a radial flux motor in the related art;

FIG. 2 shows a schematic structural diagram of a transverse flux motor according to an embodiment of the present invention;

FIG. 3 shows a schematic plan view of a motor stator according to an embodiment of the present invention;

FIG. 4 shows a schematic structural diagram of a stator module according to an embodiment of the present invention;

FIG. 5 shows a schematic structural diagram of a stator tooth according to an embodiment of the present invention;

FIG. 6 shows a schematic structural diagram of an arc-shaped stator yoke according to an embodiment of the present invention;

FIG. 7 shows a schematic structural diagram of an arc-shaped stator yoke according to another embodiment of the present invention;

FIG. 8 shows a schematic plan view of a rotor of a motor according to an embodiment of the present invention.

Among them, the corresponding relationship between the reference numerals and the component names in Fig. 1 to Fig. 8 is:

10 outer rotor, 20 inner stator, 30 stator module, 302 arc stator yoke, 304 stator teeth, 306 stator winding, 3042 tooth claw, 3044 tooth waist, 3046 tooth root, 3046A fixing slot, 3046B first side wall, 3046C second side wall, 3022 slot structure, 40 motor rotor, 402 rotor yoke, 404 permanent magnet.

Detailed ways

In order to understand the above objects, features and advantages of the present invention more clearly, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments may be combined with each other in the case of no conflict.

Many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited by the specific details disclosed below. Example limitations.

A motor stator according to some embodiments of the present invention is described below with reference to FIGS. 2 to 7 .

As shown in FIG. 2 to FIG. 4 , a motor stator according to an embodiment of the present invention includes: a plurality of stator modules 30 spliced in the circumferential direction, and the stator module 30 includes: an arc-shaped stator yoke 302; a plurality of stator teeth 304, It can be assembled on the arc-shaped stator yoke part 302 in the circumferential direction, and can extend to the axis of the arc-shaped stator yoke part 302; the stator winding 306 is surrounded by the arc-shaped stator yoke part 302 in the circumferential direction. After extending along the arcuate surface of the arcuate stator yoke 302 away from the axis, it is wound around the arcuate surface area close to the axis, and can pass through the stator teeth 304, wherein through two adjacent arcuate stator yokes The parts 302 are spliced end to end along the circumferential direction to form a plurality of stator modules 30 spliced along the circumferential direction.

In this embodiment, a motor stator formed by splicing multiple stator modules 30 arranged in the circumferential direction is used as the motor stator of the transverse flux motor. Each stator module 30 includes an arc-shaped stator yoke 302 and is assembled on an arc A plurality of stator teeth 304 on the stator yoke portion 302, the stator windings 306 are wound along a circumferential contour perpendicular to the axial direction on the arc-shaped stator yoke portion 302, and can pass through the plurality of stator teeth 304 in the circumferential direction, on the one hand , the phase difference of the induced voltage of the stator winding 306 on each stator module 30 can be adjusted by adjusting the physical distance between the stator modules 30, so as to obtain a transverse flux motor with the required number of phases, such as two-phase, three-phase , or a multi-phase motor, compared with the stator modules 30 in the prior art that are arranged in the axial direction, the increase in the number of phases is achieved by increasing the number of stator modules 30 (that is, increasing the axial size of the motor stator). The axial size of the motor stator is only equivalent to the axial size of the one-phase motor stator in the prior art, thereby reducing the axial size of the motor. On the one hand, since the stator winding 306 is wound along the circumferential contour perpendicular to the axial direction on the arc-shaped stator yoke 302, it will not protrude from the end face of the stator yoke, which is also beneficial to the overall thinning of the motor.

Wherein, the stator teeth 304 are assembled on the arc-shaped stator yoke 302, and can be realized in various forms. For example, the stator teeth 304 and the arc-shaped stator yoke 302 can be assembled in a radial butt, or assembled by nesting each other.

In addition, the insulation between the stator winding 306 and the stator yoke and the stator teeth 304 can be achieved by using slot paper, or by using an insulating frame.

The stator module 30 may be fabricated by an overmolding process.

In addition, the stator teeth 304 in the above embodiment provided by the present invention may also have the following additional technical features:

As shown in FIG. 5 , in the above embodiment, preferably, the stator teeth 304 include: a tooth waist portion 3044 ; a tooth root portion 3046 , which is provided at one end of the tooth waist portion 3044 , and includes a toothed portion 304 , which is formed by extending along the axial direction of the arc-shaped stator yoke portion 302 . The fixing groove 3046A formed by the two side walls; the tooth claw part 3042 is arranged at the other end of the tooth waist part 3044 and extends in the same direction as the tooth waist part 3044, wherein the arc stator yoke part 302 is sleeved in the fixing groove In 3046A, the stator teeth 304 are assembled with the arcuate stator yoke 302 .

In this embodiment, the stator teeth 304 are assembled on the arc-shaped stator yoke 302 by opening a fixing slot 3046A at the root of the stator teeth 304, and the fixing slot 3046A is matched with the stator yoke, so that the stator teeth 304 are assembled on the arc-shaped stator yoke 302. While improving the assembly strength between the stator yokes 302, the thickness or height of the stator yokes can be set as small as possible, so as to meet the preparation requirements of driving motors in electrical equipment such as washing machines.

Additionally, each stator tooth 304 may include a root portion 3046, a waist portion 3044, and a claw portion 3042, and each stator tooth 304 may include a root portion 3046, a waist portion 3044, and a claw portion 3042, the root portion 3046 being used to communicate with the stator yoke The inner walls of the two adjacent tooth waist portions 3044 enclose an arrangement space for forming windings, and the tooth claw portions 3042 can be arranged in the circumferential direction to form a circumferential mating surface for the motor rotor 40 .

As shown in FIGS. 2 to 4 , in any of the above-mentioned embodiments, preferably, the fixing slots 3046A on two adjacent stator teeth 304 are reversely arranged on the arc-shaped stator yoke 302 , so that adjacent The two stator teeth 304 are arranged in opposite directions in the axial direction, wherein a passing area for forming the stator winding 306 can be surrounded between two adjacent stator teeth 304 , so that the stator winding 306 extends circumferentially along the inner side wall of the tooth waist 3044 .

In this embodiment, by arranging two adjacent stator teeth 304 in opposite directions in the axial direction, so that the two adjacent stator teeth 304 can achieve the axial limitation of the stator winding 306 , so that the entire stator module 30 can It seems that after the stator winding 306 is wound along the outer arc surface, it is wound in reverse after passing through the side wall of the end of the stator yoke, and the tooth waists 3044 of the two adjacent stator teeth 304 are located at the to limit the stator winding 306 in the axial direction, and the claw portions 3042 of the two adjacent stator teeth 304 are used to limit the radial position of the stator winding 306. The setting accuracy of the stator windings 306 being wound in the circumferential direction is improved, which is beneficial to improve the performance of the motor.

As shown in FIG. 4 and FIG. 5 , in any of the above embodiments, preferably, the stator teeth 304 are formed by a plurality of stator teeth 304 punched in a circumferentially stacked structure.

In this embodiment, by forming the stator teeth 304 in the form of stamping of the stator teeth 304, and then combining the stator yoke structure to form the stator core structure, compared with the transverse flux motor or the claw motor using solid teeth, the While greatly reducing the core loss, there is no need to increase the cost of large process improvement.

As shown in FIG. 6 , in any of the above embodiments, preferably, the outer side wall and the inner side wall of the arc-shaped stator yoke portion 302 are respectively formed by a multi-section straight surface splicing structure along the circumferential direction.

In this embodiment, the part of the arc-shaped stator yoke 302 that is matched with the fixing slot 3046A is a straight surface structure, so as to realize the fitting between the fixing slot 3046A and the stator yoke, which is beneficial to improve the assembled The strength of the motor stator.

As shown in FIG. 7 , in any of the above embodiments, preferably, the outer and inner side walls of the arc-shaped stator yoke portion 302 are circular arc surfaces, and the area on the circular arc surface that cooperates with the stator teeth 304 is formed by concave arrangement. The slot structure 3022 is matched with the side wall of the fixing slot 3046A.

In this embodiment, the slot structures 3022 are provided on the arc-shaped stator yoke 302 to cooperate with the two side walls of the fixing slot 3046A respectively, so as to realize the circumferential positioning of the stator teeth 304. At the same time, the stability of the motor stator assembly is improved.

As shown in FIG. 6 and FIG. 7 , in any of the above embodiments, preferably, the arc-shaped stator yoke 302 is formed by stacking a plurality of stator yoke punches in the axial direction.

In any of the above embodiments, preferably, the cross-sectional shape of the fixing groove 3046A is configured to be any one of a rectangle, a U-shape, and a trapezoid.

In this embodiment, the cross-section of the fixing slot 3046A can have various structural forms, and changes with the change of the cross-sectional shape of the stator yoke to meet the setting requirements of different motor stator structures.

Preferably, the cross-sectional shape of the fixing groove 3046A is a rectangle or a trapezoid.

In any of the above embodiments, preferably, the length of the side wall of the fixing groove 3046A away from the tooth waist portion 3044 is less than or equal to the length of the side wall near the tooth waist portion 3044 .

In this embodiment, the side wall (second side wall 3046C) away from the tooth waist portion 3044 is mainly used to cooperate with the stator yoke and achieve mechanical fixation. At this time, the length of the second side wall 3046C may be less than or equal to The length of the side wall (the first side wall 3046B) near the tooth waist 3044, and the length of the second side wall 3046C is further reduced to set the length of the second side wall 3046C to be smaller than the length of the first side wall 3046B, It can effectively reduce the quality of the entire motor stator.

As for the first side wall 3046B, a fixing slot 3046A is formed in cooperation with the second side wall 3046C to achieve mechanical fixing with the stator yoke, and at the same time, the magnetic field lines transmitted from the tooth waist 3044 can be transmitted to the stator yoke, Therefore, by setting the first side wall 3046B as a longer side, the probability of magnetic flux leakage can be effectively reduced.

In any of the above embodiments, preferably, the thickness of the side wall of the fixing groove 3046A away from the tooth waist portion 3044 is less than or equal to the thickness of the side wall near the tooth waist portion 3044 .

In this embodiment, by setting the thickness of the second side wall 3046C to be smaller than the thickness of the first side wall 3046B, on the one hand, by limiting the thickness of the first side wall 3046B, to ensure the transmission of the magnetic field lines transmitted by the tooth waist 3044 In the stator yoke, it is beneficial to reduce the probability of magnetic flux leakage. On the other hand, by limiting the thickness of the second side wall 3046C, it is also beneficial to reduce the weight of the motor stator while meeting the strength of the mechanical fixation.

As shown in FIG. 1 and FIG. 2 , a motor according to an embodiment of the present invention includes: a motor stator according to any embodiment of the first aspect of the present invention; a motor rotor 40 sleeved and assembled with the motor stator, wherein the motor The stator is the outer stator.

The motor is specifically a reluctance transverse flux motor.

In this embodiment, by setting the motor rotor 40 as an inner rotor to form an inner rotor reluctance transverse flux motor, compared with an outer rotor motor, no safety clearance is required, which can further reduce the overall size of the motor.

As shown in FIG. 8 , in the above embodiment, preferably, the motor rotor 40 includes: a plurality of arc-shaped rotor yokes 402 , which can be spliced end to end along the circumferential direction to form an annular rotor yoke 402 . A plurality of magnetic steel positioning teeth are arranged on the arc side wall along the circumferential direction, and a magnetic steel positioning groove is defined between any two adjacent magnetic steel positioning teeth; a plurality of permanent magnets 404 are correspondingly arranged in the magnetic steel positioning groove inside, and can protrude the magnetic steel positioning groove.

Among them, the motor rotor 40 can also be prepared by a plastic wrapping process, and the plastic wrapping material fills the direct gap of the entire permanent magnet magnet, so that the permanent magnet magnet can be reinforced, so as not to be thrown out by centrifugal force in some high-speed applications

In any of the above embodiments, preferably, for the adjacent rotor yokes 402, a splicing groove is provided at the rear end of one, and a splicing tooth structure capable of matching with the splicing groove is provided at the head end of the other.

In this embodiment, a splicing slot and a splicing tooth structure are respectively provided in the areas where the two adjacent rotor yokes 402 are matched, and the splicing slot and the splicing tooth structure are matched, so as to realize the precision between the two adjacent stator rotors. Positioning assembly.

In any of the above embodiments, preferably, the motor stator has n stator modules, wherein, when the number of phases of the motor is m, the number of stator modules in each phase is n/m.

In this embodiment, for a motor with n stator modules, the number of phases depends on the number of modules contained in each phase. If the number of modules in each phase is a, and a is an integer not less than 1, then the total number of motor phases m is n/a. When a is 1, each stator module represents a phase, which is arranged in turn in the circumferential direction. The space angle occupied by each phase is equal to the space angle occupied by each module, that is, 360°/n. If a is greater than 1, when arranging in the circumferential direction, firstly arrange the phases in the order of one module per phase. After arranging m windings, repeat the previous arrangement until repeating a times. Potential harmonics and torque ripple, usually set a and m to integers greater than 1.

In the present invention, the terms "first", "second" and "third" are only used for the purpose of description, and cannot be construed as indicating or implying relative importance; the term "multiple" refers to two or two above, unless otherwise expressly defined. The terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be It is directly connected or indirectly connected through an intermediary. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In the description of the present invention, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. are based on the orientations shown in the accompanying drawings Or the positional relationship is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or unit must have a specific direction, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiment", etc. means that a particular feature, structure, material or characteristic described in connection with the embodiment or example is included in the present invention at least one embodiment or example of . In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or instance. 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 above are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (14)

1. An electric machine stator, comprising:

a plurality of circumferentially split stator modules, the stator modules comprising:

an arcuate stator yoke;

a plurality of stator teeth which can be assembled on the arc-shaped stator yoke along the circumferential direction in a matching way and can extend towards the axis of the arc-shaped stator yoke;

the stator winding is circumferentially wound on the arc-shaped stator yoke, can extend along an arc surface of the arc-shaped stator yoke, which is far away from the axis, and then is wound to an arc surface area close to the axis, and can penetrate through the stator teeth,

the adjacent two arc stator yokes are spliced end to end in the circumferential direction to form a plurality of stator modules spliced in the circumferential direction.

2. The electric machine stator of claim 1, wherein the stator teeth comprise:

a lumbar region;

a tooth root portion provided at one end of the tooth waist portion, including a fixing groove formed by two side wall configurations extending in an axial direction of the arc-shaped stator yoke portion;

a claw part arranged at the other end of the tooth waist part and extending along the same direction with the fixed groove,

and the arc-shaped stator yoke is sleeved in the fixing groove, so that the stator teeth and the arc-shaped stator yoke are assembled in a matched mode.

3. The motor stator of claim 2,

the fixing grooves on two adjacent stator teeth are reversely sleeved on the arc-shaped stator yoke part so as to enable the two adjacent stator teeth to be reversely arranged along the axial direction,

and a crossing region for forming the stator winding can be enclosed between two adjacent stator teeth, so that the stator winding extends along the circumferential direction of the inner side wall of the tooth waist part.

4. The motor stator of claim 2,

the stator teeth are formed by a plurality of stator tooth punching sheets in a circumferential overlapping structure.

5. The motor stator of claim 1,

the outer side wall and the inner side wall of the arc-shaped stator yoke portion are formed by splicing a plurality of sections of straight surfaces along the circumferential direction.

6. The motor stator of claim 1,

the outer side wall and the inner side wall of the arc-shaped stator yoke part are arc surfaces, the region matched with the stator teeth on the arc surfaces is provided with a clamping groove structure matched with the side wall of the fixed groove through a concave arrangement,

the depth of the clamping groove structure is the same as the thickness of the corresponding side wall.

7. The motor stator of claim 1,

the arc stator yoke is formed by stacking a plurality of stator yoke punching sheets along the axial direction.

8. The motor stator according to any one of claims 2 to 7,

the sectional shape of the fixing groove is configured to be any one of a rectangle, a U-shape, and a trapezoid.

9. The motor stator according to any one of claims 2 to 7,

the length of the side wall of the fixing groove far away from the tooth waist part is smaller than or equal to the length of the side wall close to the tooth waist part.

10. The motor stator according to any one of claims 2 to 7,

the thickness of the side wall of the fixing groove far away from the tooth waist part is smaller than or equal to the thickness of the side wall close to the tooth waist part.

11. An electric machine, comprising:

an electric machine stator as claimed in any one of claims 1 to 10;

a motor rotor sleeved with the motor stator,

wherein, the motor stator is an outer stator.

12. The electric machine of claim 11, wherein the electric machine rotor comprises:

the magnetic steel positioning mechanism comprises a plurality of arc-shaped rotor yoke parts, a plurality of magnetic steel positioning teeth and a plurality of magnetic steel positioning grooves, wherein the arc-shaped rotor yoke parts can be spliced end to end along the circumferential direction to form an annular rotor yoke part;

and the permanent magnets are correspondingly arranged in the magnetic steel positioning grooves and can protrude out of the magnetic steel positioning grooves.

13. The electric machine of claim 12,

for two adjacent rotor yoke parts, a splicing groove is formed in the tail end of one rotor yoke part, and a splicing tooth structure matched with the splicing groove is arranged at the head end of the other rotor yoke part.

14. The electric machine of claim 11,

the stator of the motor is provided with n stator modules,

when the number of phases of the motor is m, the number of the stator modules in each phase is n/m.

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