Transverse Flux Motor

Abstract

The present invention proposes a transverse flux motor, comprising: a motor stator, comprising: a plurality of stator modules spliced ​​together along the circumferential direction; the stator modules comprising: a stator core, comprising an arc-shaped stator yoke and a plurality of stator teeth disposed on the arc-shaped stator yoke and extending in the axial direction; a stator winding, capable of wrapping circumferentially around the arc-shaped stator yoke to generate a transverse magnetic flux when energized; a motor rotor, assembled and nested with the motor stator, wherein the angle between two adjacent stator teeth satisfies: #imgabs0#N t Where m is the number of stator teeth on each stator module, m is the number of motor phases, and p is the number of rotor poles. Compared to the prior art where the pitch between adjacent stator teeth is equal to the pitch between adjacent magnetic poles, the present invention's technical solution, by adjusting the tooth pitch, can reduce electromagnetic torque pulsation and achieve noise reduction while maintaining low cost and a low-difficulty manufacturing coefficient.

Description

Technical Field

[0001] The present invention relates to the field of motors, and in particular to a transverse flux motor. Background Art

[0002] For motors such as transverse flux motors and claw pole permanent magnet motors, the presence of a positioning force between the stator teeth on the motor stator and the magnets on the motor rotor results in large electromagnetic torque pulsations during the motor's rotation. Related technologies use the following methods to reduce electromagnetic torque pulsations, but these methods also have drawbacks:

[0003] (1) For transverse flux motors, the electromagnetic torque pulsations of each phase of the motor are offset by the inherent phase shift between the phases. However, when the number of phases is large, the structure of the motor is too complex and the process is difficult to implement. In addition, this method is usually applied to motors that increase the number of phases in the axial direction.

[0004] (2) Using skewed slots or skewed poles to reduce electromagnetic torque pulsation, but the process is also more difficult, resulting in increased manufacturing costs. Summary of the Invention

[0005] In order to solve at least one of the above technical problems, an object of the present invention is to provide a transverse flux machine.

[0006] To achieve the above objectives, the technical solution of the present invention provides a transverse flux motor, comprising: a motor stator, comprising: a plurality of stator modules spliced ​​together in a circumferential direction, the stator modules comprising: a stator core, comprising an arcuate stator yoke and a plurality of stator teeth disposed on the arcuate stator yoke and extending in an axial direction; a stator winding capable of circumferentially wrapping around the arcuate stator yoke to generate a transverse magnetic flux when energized; and a motor rotor, assembled and nested with the motor stator, wherein the angle between two adjacent stator teeth satisfies: N t is the number of stator teeth on each stator module, m is the number of phases of the motor, and p is the number of poles of the motor rotor.

[0007] In this technical solution, for a transverse flux motor, the stator winding is wound along a circumferential profile perpendicular to the axial direction on an arc-shaped stator yoke and is able to pass through a plurality of stator teeth in the circumferential direction to generate a transverse magnetic flux when energized. The angle (mechanical angle) between two adjacent stator teeth in the prior art is adjusted from 2π / p in the prior art to That is, increase The unit is radian, that is, without changing the arc-shaped stator yoke, the tooth pitch between the stator teeth on the stator yoke is adjusted to increase the tooth pitch. Compared with the setting direction of the tooth pitch of adjacent stator teeth being equal to the pole pitch between adjacent magnetic poles in the prior art, by adjusting the tooth pitch, the electromagnetic torque pulsation can be reduced and noise reduction can be achieved while maintaining low cost and low difficulty process coefficient.

[0008] The electrical angle is equal to the mechanical angle multiplied by the number of pole pairs.

[0009] In addition, the transverse flux motor in the above technical solution provided by the present invention may also have the following additional technical features:

[0010] In the above technical solution, preferably, a plurality of stator teeth can be assembled and matched on the arc-shaped stator yoke along the circumferential direction to form a stator core.

[0011] In this technical solution, the stator teeth are assembled to the stator yoke to form a stator core structure. Compared with motors using stator teeth partially or entirely made of metallurgical materials, the process is simpler and the cost is lower.

[0012] In any of the above technical solutions, preferably, the stator teeth include: a tooth waist portion; a tooth root portion, which is arranged at one end of the tooth waist portion and includes a fixing groove formed by two side wall structures extending axially along the arc-shaped stator yoke portion; a tooth claw portion, which is arranged at the other end of the tooth waist portion and extends in the same direction as the tooth waist portion, wherein the stator teeth are assembled in cooperation with the arc-shaped stator yoke portion by sleeve-fitting the arc-shaped stator yoke portion in the fixing groove.

[0013] In this technical solution, a fixing groove is opened at the root of the stator tooth, and the fixing groove cooperates with the stator yoke to realize the assembly of the stator teeth on the arc-shaped stator yoke. While meeting the assembly strength between the stator teeth and the arc-shaped stator yoke, the thickness or height of the stator yoke can be set as small as possible to meet the preparation requirements of the drive motor in electrical equipment such as washing machines.

[0014] In addition, each stator tooth may include a tooth root portion, a tooth waist portion and a tooth claw portion. Each stator tooth may include a tooth root portion, a tooth waist portion and a tooth claw portion. The tooth root portion is used to connect with the stator yoke portion, and the inner walls of the two adjacent tooth waist portions are arranged to form a winding arrangement space, and the tooth claw portion can be arranged along the circumferential direction to form a circumferential mating surface that cooperates with the motor rotor.

[0015] Specifically, one end of the claw portion is a straight surface flush with the tooth waist, and the tooth side surface and tooth top surface extending obliquely along the tooth waist to the other end, as well as the right-angled triangle structure formed by the above-mentioned straight surfaces, are formed by a tooth boot portion formed by a tooth side surface extending outward. By setting the tooth side surfaces on two adjacent stator teeth in reverse, it is beneficial to realize the modular setting of the motor stator, thereby ensuring the stability of the winding and the operating performance of the motor.

[0016] In any of the above technical solutions, preferably, the fixed grooves on two adjacent stator teeth are reversely arranged on the arc-shaped stator yoke so that the two adjacent stator teeth are arranged in opposite directions along the axial direction, wherein a crossing area of ​​the stator winding can be formed between the two adjacent stator teeth, so that the stator winding can extend along the arc surface away from the axis on the arc-shaped stator yoke and then be wound to the arc surface area close to the axis, and extend circumferentially along the inner side wall of the tooth waist.

[0017] In this technical solution, two adjacent stator teeth are arranged in opposite directions in the axial direction so that the two adjacent stator teeth can realize axial limitation of the stator winding. From the perspective of the entire stator module, the stator winding is wound along the outer arc surface and then wound in reverse after passing through the side wall of the end of the stator yoke. The tooth waists of the two adjacent stator teeth are respectively located on both sides of the stator winding to limit the stator winding axially. The tooth claws of the two adjacent stator teeth are used to limit the stator winding radially. Through axial limitation and radial limitation, the setting accuracy of the stator winding along the circumferential direction is guaranteed, which is beneficial to improving the performance of the motor.

[0018] In any of the above technical solutions, preferably, the stator teeth are formed by a plurality of stator tooth punchings stacked in the circumferential direction.

[0019] In this technical solution, stator teeth are formed in the form of stator tooth punching sheets, and then combined with the stator yoke structure to form a stator core structure. Compared with the transverse flux motor or claw motor with solid teeth, this can greatly reduce the core loss without increasing the cost of process improvement.

[0020] In any of the above technical solutions, preferably, the arc-shaped stator yoke is formed by stacking a plurality of stator yoke punching sheets in the axial direction.

[0021] 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.

[0022] In this technical solution, the cross-section of the fixing slot can have a variety of structural forms and change with the change of the cross-sectional shape of the stator yoke to meet the setting requirements of different motor stator structures.

[0023] Preferably, the cross-sectional shape of the fixing groove is rectangular or trapezoidal.

[0024] 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.

[0025] 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. By further reducing the length of the side wall away from the tooth waist to set the length of the side wall to be less than the length of the side wall close to the tooth waist, the mass of the entire motor stator can be effectively reduced.

[0026] As for the side wall close to the tooth waist, while cooperating with the side wall away from the tooth waist to form a fixing groove to achieve mechanical fixation with the stator yoke, it can transmit the magnetic lines transmitted from the tooth waist to the stator yoke. Therefore, by setting the side wall close to the tooth waist as a longer side, the probability of magnetic leakage can be effectively reduced.

[0027] 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.

[0028] 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 limiting the thickness of the side wall close to the tooth waist, it is ensured that the magnetic lines transmitted from the tooth waist are transmitted to the stator yoke, and at the same time it is beneficial to reduce the probability of magnetic leakage. On the other hand, by limiting the thickness of the side wall away from the tooth waist, while meeting the strength of mechanical fixation, it is also beneficial to reduce the weight of the motor stator.

[0029] 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 plurality of straight surfaces spliced ​​together along the circumferential direction.

[0030] In any of the above technical solutions, preferably, the outer wall and the inner wall of the arc-shaped stator yoke are arc surfaces, and the area on the arc surface that cooperates with the stator teeth is recessed to form a slot structure that cooperates with the side wall of the fixed slot, wherein the depth of the slot structure is the same as the thickness of the corresponding side.

[0031] In any of the above technical solutions, preferably, the stator core is formed by a whole piece of steel through die-forming.

[0032] In this technical solution, the stator core is prepared by using a whole steel frame. Compared with the stacking and assembly of stator yoke punchings and stator tooth punchings, the overall strength is better, so the motor can have higher stability during operation.

[0033] 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.

[0034] 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 per 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 one phase, and they are arranged in sequence along the circumferential direction. The spatial angle occupied by each phase is equal to the spatial angle occupied by each module, that is, 360° / n. If a is greater than 1, then when arranging in the circumferential direction, the phases are first arranged in sequence in the order of one module per phase. After arranging m windings, the previous arrangement is repeated until it is repeated a times. In order to reduce back electromotive force harmonics and electromagnetic torque pulsation, a and m are usually set to integers greater than 1.

[0035] In any of the above technical solutions, preferably, the motor rotor includes: a plurality of arc-shaped rotor yokes, which can be arranged circumferentially to form an annular rotor yoke, a plurality of magnetic steel positioning teeth are arranged circumferentially on the arc side walls of the arc-shaped rotor yoke, 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 grooves and can protrude from the magnetic steel positioning grooves.

[0036] One or more technical solutions provided in the technical solution of this application have at least the following technical effects or advantages:

[0037] By adjusting the angle (mechanical angle) between two adjacent stator teeth in the prior art from 2π / p in the prior art to That is, increase The unit is radian, that is, without changing the arc-shaped stator yoke, the tooth pitch between the stator teeth on the stator yoke is adjusted to increase the tooth pitch. Compared with the setting direction of the tooth pitch of adjacent stator teeth being equal to the pole pitch between adjacent magnetic poles in the prior art, by adjusting the tooth pitch, the electromagnetic torque pulsation can be reduced and noise reduction can be achieved while maintaining low cost and low difficulty process coefficient.

[0038] Additional aspects and advantages of the invention will become apparent from the description which follows, or may be learned by practice of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0040] Figure 1 A schematic diagram showing the distribution of stator teeth on a stator module in the related art is shown;

[0041] Figure 2A schematic structural diagram of a transverse flux motor according to an embodiment of the present invention is shown;

[0042] Figure 3 shows a structural schematic diagram of a stator module according to an embodiment of the present invention;

[0043] Figure 4 FIG2 shows a schematic diagram of the distribution of stator teeth on a stator module according to an embodiment of the present invention;

[0044] Figure 5 A schematic structural diagram of a stator tooth according to an embodiment of the present invention is shown;

[0045] Figure 6 A schematic structural diagram of an arc-shaped stator yoke according to an embodiment of the present invention is shown;

[0046] Figure 7 A schematic structural diagram of an arc-shaped stator yoke according to another embodiment of the present invention is shown;

[0047] Figure 8 A schematic diagram of torque fluctuation of a motor in the related art is shown;

[0048] Figure 9 FIG. 4 is a schematic diagram showing torque ripple of a transverse flux machine according to an embodiment of the present invention.

[0049] in, Figures 1 to 7 The corresponding relationship between the reference numerals and component names is as follows:

[0050] 10 stator module, 102 arc-shaped stator yoke, 104 stator teeth, 106 stator winding, 1042 tooth claw, 1044 tooth waist, 1046 tooth root, 1046A fixed slot, 1046B first side wall, 1046C second side wall, 20 motor rotor, 202 rotor yoke, 204 permanent magnet. DETAILED DESCRIPTION

[0051] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0052] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0053] Refer to the following Figures 1 to 8 A transverse flux machine according to some embodiments of the present invention is described.

[0054] like Figures 2 to 4 As shown, a transverse flux motor according to an embodiment of the present invention includes: a motor stator, including: a plurality of stator modules 10 spliced ​​along the circumferential direction; the stator module 10 includes: a stator core, including an arc-shaped stator yoke 102 and a plurality of stator teeth 104 provided on the arc-shaped stator yoke 102 and extending in the axial direction; a stator winding 106 capable of wrapping around the arc-shaped stator yoke 102 along the circumferential direction to generate a transverse magnetic flux when energized; a motor rotor 20, which is assembled and nested with the motor stator, wherein the angle between two adjacent stator teeth 104 satisfies: N t is the number of stator teeth 104 on each stator module 10 , m is the number of phases of the motor, and p is the number of poles of the motor rotor 20 .

[0055] In this embodiment, the transverse flux machine generates transverse flux when energized by winding the stator winding 106 along a circumferential profile perpendicular to the axial direction on the arc-shaped stator yoke 102 and passing through a plurality of stator teeth 104 in the circumferential direction.

[0056] like Figure 1 As shown, the angle (mechanical angle) between two adjacent stator teeth 104 in the prior art is α=2π / p in the prior art, as shown in FIG. Figure 4 As shown, the angle between the two stator teeth 104 after adjustment is That is, increase The unit is radian, that is, without changing the arc-shaped stator yoke 102, the tooth pitch between the stator teeth 104 on each other's stator yokes is adjusted to increase the tooth pitch. Compared with the setting direction of the tooth pitch of adjacent stator teeth 104 being equal to the pole pitch between adjacent magnetic poles in the prior art, by adjusting the tooth pitch, it is possible to reduce electromagnetic torque pulsation and achieve noise reduction while maintaining low cost and low difficulty process coefficient.

[0057] like Figure 8 and Figure 9 The torque fluctuation curve shown in the figure has been verified. Figure 1 Therefore, in a motor with the arrangement of the stator teeth 104, as shown in FIG. Figure 8 As shown in Figure 2, the torque fluctuates between [0.84, 1]. Figure 4 In the motor with the arrangement of the stator teeth 104 shown in FIG. Figure 9 As shown, the torque fluctuation is significantly reduced, that is, the electromagnetic torque pulsation is reduced, and then the motor noise is reduced.

[0058] The electrical angle is equal to the mechanical angle multiplied by the number of pole pairs.

[0059] Specifically, if Figure 2 and Figure 3As shown, a three-phase inner rotor transverse flux motor (in addition, the motor can also be an outer rotor motor), the motor rotor 20 has 44 poles, and the rotor can be of any configuration (surface mount type, plug-in type, built-in type), Figure 2 The structure shown is a surface mount structure. The motor includes six stator modules 10. Figure 3 As shown, each stator module 10 includes 6 teeth arranged in a staggered circumferential direction. Figure 5 shows the structure of the stator teeth 104, Figure 6 and Figure 7 Two structures of arc-shaped stator yoke 102 are shown.

[0060] like Figure 1 As shown, the transverse flux motor in the related art has the same tooth pitch and pole pitch (measured in mechanical angle, in radians), both of which are The total electrical angle is 180°.

[0061] like Figure 4 As shown, by adjusting the spacing between the stator teeth 104, the tooth pitch is increased to That is, an electrical angle of 190°, that is, the tooth pitch is increased by 10° electrical angle to achieve electromagnetic torque pulsation.

[0062] In the above embodiment, preferably, the plurality of stator teeth 104 can be assembled and matched on the arc-shaped stator yoke 102 along the circumferential direction to form a stator core.

[0063] In this embodiment, the stator teeth 104 are assembled to the stator yoke 102 to form a stator core structure. Compared with a motor in which the stator teeth 104 are partially or entirely made of metallurgical materials, the process is simpler and the cost is lower.

[0064] like Figure 5 As shown, in any of the above embodiments, preferably, the stator tooth 104 includes: a tooth waist portion 1044; a tooth root portion 1046, which is arranged at one end of the tooth waist portion 1044 and includes a fixing groove 1046A formed by two side wall structures extending axially along the arc-shaped stator yoke portion 102; a tooth claw portion 1042, which is arranged at the other end of the tooth waist portion 1044 and extends in the same direction as the tooth waist portion 1044, wherein the stator tooth 104 is assembled with the arc-shaped stator yoke portion 102 by sleeved in the fixing groove 1046A.

[0065] In this embodiment, a fixing groove 1046A is opened at the root of the stator tooth 104, and the fixing groove 1046A cooperates with the stator yoke to realize the assembly of the stator tooth 104 on the arc-shaped stator yoke 102. While meeting the assembly strength between the stator tooth 104 and the arc-shaped stator yoke 102, the thickness or height of the stator yoke can be set as small as possible to meet the preparation requirements of the drive motor in electrical equipment such as washing machines.

[0066] In addition, each stator tooth 104 may include a tooth root portion 1046, a tooth waist portion 1044 and a tooth claw portion 1042. Each stator tooth 104 may include a tooth root portion 1046, a tooth waist portion 1044 and a tooth claw portion 1042. The tooth root portion 1046 is used to connect with the stator yoke portion, and the inner walls of the two adjacent tooth waist portions 1044 are enclosed to form a winding arrangement space, and the tooth claw portion 1042 can be arranged along the circumferential direction to form a circumferential mating surface that cooperates with the motor rotor 20.

[0067] like Figure 5 As shown, specifically, one end of the claw portion 1042 is a straight surface flush with the tooth waist portion 1044, and the tooth side surface and tooth top surface extending obliquely toward the other end along the tooth waist portion 1044, as well as the right-angled triangle structure formed by the above-mentioned straight surfaces, and the tooth boot portion formed by a tooth side surface extending outward, by setting the tooth side surfaces on two adjacent stator teeth 104 in reverse, can facilitate the modular setting of the motor stator, thereby ensuring the stability of the winding and the motor operating performance.

[0068] like Figure 3 As shown, in any of the above embodiments, preferably, the fixing grooves 1046A on the two adjacent stator teeth 104 are reversely sleeved on the arc-shaped stator yoke 102, so that the two adjacent stator teeth 104 are arranged in reverse directions along the axial direction, wherein a crossing area of ​​the stator winding 106 can be enclosed between the two adjacent stator teeth 104, so that the stator winding 106 can extend along the arc surface away from the axis on the arc-shaped stator yoke 102 and then be wound to the arc surface area close to the axis, and extend circumferentially along the inner wall of the tooth waist 1044.

[0069] In this embodiment, two adjacent stator teeth 104 are arranged in opposite directions in the axial direction so that the two adjacent stator teeth 104 can realize axial limitation of the stator winding 106. Thus, from the perspective of the entire stator module 10, the stator winding 106 is wound along the outer arc surface and then wound in reverse after passing through the side wall of the end of the stator yoke. The tooth waist portions 1044 of the two adjacent stator teeth 104 are respectively located on both sides of the stator winding 106 to axially limit the stator winding 106. The tooth claw portions 1042 of the two adjacent stator teeth 104 are used to radially limit the stator winding 106. Through axial limitation and radial limitation, the setting accuracy of the stator winding 106 along the circumferential direction is guaranteed, which is beneficial to improving the motor performance.

[0070] like Figure 3 and Figure 5 As shown, in any of the above embodiments, preferably, the stator teeth 104 are formed by a plurality of stator tooth 104 punching sheets stacked in the circumferential direction.

[0071] In this embodiment, the stator teeth 104 are formed in the form of stator tooth 104 punching sheets, and then combined with the stator yoke structure to form a stator core structure. Compared with the transverse flux motor or claw motor using solid teeth, the core loss can be greatly reduced without increasing the process improvement cost.

[0072] like Figure 6 and Figure 7 As shown, in any of the above embodiments, preferably, the arc-shaped stator yoke 102 is formed by stacking a plurality of stator yoke punching sheets in the axial direction.

[0073] In any of the above embodiments, preferably, the cross-sectional shape of the fixing groove 1046A is configured as any one of a rectangle, a U-shape, and a trapezoid.

[0074] In this embodiment, the cross-section of the fixing slot 1046A can have various structural forms and change with the change of the cross-sectional shape of the stator yoke to meet the setting requirements of different motor stator structures.

[0075] Preferably, the cross-sectional shape of the fixing groove 1046A is rectangular or trapezoidal.

[0076] In any of the above embodiments, preferably, the length of the side wall of the fixing groove 1046A away from the tooth waist 1044 is less than or equal to the length of the side wall close to the tooth waist 1044 .

[0077] In this embodiment, the side wall (second side wall 1046C) away from the tooth waist 1044 is mainly used to cooperate with the stator yoke and achieve mechanical fixation. At this time, the length of the second side wall 1046C can be less than or equal to the length of the side wall (first side wall 1046B) close to the tooth waist 1044. By further reducing the length of the second side wall 1046C to set the length of the second side wall 1046C to be less than the length of the first side wall 1046B, the mass of the entire motor stator can be effectively reduced.

[0078] As for the first side wall 1046B, while cooperating with the second side wall 1046C to form a fixing groove 1046A to achieve mechanical fixation with the stator yoke, it can transmit the magnetic lines transmitted from the tooth waist 1044 to the stator yoke. Therefore, by setting the first side wall 1046B as the longer side, the probability of magnetic leakage can be effectively reduced.

[0079] In any of the above embodiments, preferably, the thickness of the side wall of the fixing groove 1046A away from the tooth waist 1044 is less than or equal to the thickness of the side wall close to the tooth waist 1044 .

[0080] In this embodiment, by setting the thickness of the second side wall 1046C to be smaller than the thickness of the first side wall 1046B, on the one hand, by limiting the thickness of the first side wall 1046B, it is ensured that the magnetic lines transmitted from the tooth waist 1044 are transmitted to the stator yoke, and at the same time it is beneficial to reduce the probability of magnetic leakage. On the other hand, by limiting the thickness of the second side wall 1046C, while meeting the strength of mechanical fixation, it is also beneficial to reduce the weight of the motor stator.

[0081] like Figure 6 As shown, in any of the above embodiments, preferably, the outer side wall and the inner side wall of the arc-shaped stator yoke 102 are respectively formed by a plurality of straight surfaces spliced ​​together along the circumferential direction.

[0082] like Figure 7 As shown, in any of the above embodiments, preferably, the outer wall and the inner wall of the arc-shaped stator yoke 102 are arc surfaces, and the area on the arc surface that cooperates with the stator teeth 104 is recessed to form a slot structure that cooperates with the side wall of the fixing slot 1046A, wherein the depth of the slot structure is the same as the thickness of the corresponding side.

[0083] In any of the above embodiments, preferably, the stator core is formed from a single piece of steel by die-casting.

[0084] In this embodiment, the stator core is prepared by using a whole steel frame. Compared with the method of stacking and assembling the stator yoke punchings and the stator teeth 104 punchings, the overall strength is better, so the motor can have higher stability during operation.

[0085] In any of the above embodiments, preferably, the motor stator has n stator modules 10 , wherein when the number of phases of the motor is m, the number of stator modules 10 in each phase is n / m.

[0086] In this embodiment, for a motor with n stator modules 10, the number of phases depends on the number of modules contained in each phase. If the number of modules per 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 10 represents one phase, and they are arranged in sequence along the circumferential direction. The spatial angle occupied by each phase is equal to the spatial angle occupied by each module, that is, 360° / n. If a is greater than 1, when arranging in the circumferential direction, the phases are first arranged in sequence in the order of one module per phase. After arranging m windings, the previous arrangement is repeated until it is repeated a times. In order to reduce back electromotive force harmonics and electromagnetic torque pulsation, a and m are usually set to integers greater than 1.

[0087] like Figure 2 As shown, in any of the above embodiments, preferably, the motor rotor 20 includes: a plurality of arc-shaped rotor yokes 202, which can be arranged circumferentially to form an annular rotor yoke 202, a plurality of magnetic steel positioning teeth are arranged circumferentially on the arc side walls of the arc-shaped rotor yoke 202, and a magnetic steel positioning groove is defined between any two adjacent magnetic steel positioning teeth; a plurality of permanent magnets 204, which are correspondingly arranged in the magnetic steel positioning grooves and can protrude from the magnetic steel positioning grooves.

[0088] In the present invention, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "plurality" refers to two or more, unless expressly limited otherwise. Terms such as "installed," "connected," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; "connected" can mean a direct connection or an indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of these terms in the present invention based on specific circumstances.

[0089] In the description of the present invention, it should be understood that the directions or positional relationships indicated by terms such as "up", "down", "left", "right", "front" and "back" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0090] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0091] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A transverse flux motor, characterized in that: include: Motor stator, including: A plurality of stator modules spliced ​​along the circumferential direction, wherein the stator modules include: The stator core includes an arc-shaped stator yoke and a plurality of stator teeth arranged on the arc-shaped stator yoke and extending toward the axial direction; The stator winding can be circumferentially wound around the arc-shaped stator yoke to generate a transverse magnetic flux after being energized. The motor rotor is assembled with the motor stator. The angle between two adjacent stator teeth satisfies: N t is the number of the stator teeth on each stator module, m is the number of phases of the motor, and p is the number of poles of the motor rotor; The plurality of stator teeth can be assembled on the arc-shaped stator yoke along the circumferential direction to form the stator core; Each of the stator modules includes stator teeth that are arranged in a staggered circumferential direction.

2. The transverse flux machine according to claim 1, wherein: The stator teeth include: tooth waist; a tooth root portion, provided at one end of the tooth waist portion, comprising a fixing groove formed by two sidewall structures extending along the axial direction of the arc-shaped stator yoke portion; The tooth claw portion is provided at the other end of the tooth waist portion and extends in the same direction as the tooth waist portion. Wherein, the stator teeth are assembled with the arc-shaped stator yoke by sleeve-mounting the arc-shaped stator yoke in the fixing groove.

3. The transverse flux machine according to claim 2, wherein: The fixing grooves on two adjacent stator teeth are sleeved on the arc-shaped stator yoke in opposite directions, so that the two adjacent stator teeth are arranged in opposite directions along the axial direction. Among them, a crossing area of ​​the stator winding can be formed between two adjacent stator teeth, so that the stator winding can extend along the arc surface away from the axis on the arc-shaped stator yoke and then be wound to the arc surface area close to the axis, and extend circumferentially along the inner wall of the tooth waist.

4. The transverse flux machine according to claim 2, wherein: The stator teeth are formed by stacking a plurality of stator tooth punching sheets in a circumferential direction.

5. The transverse flux machine according to claim 4, characterized in that The arc-shaped stator yoke is formed by stacking a plurality of stator yoke punching sheets in the axial direction.

6. The transverse flux machine according to claim 2, wherein: The cross-sectional shape of the fixing groove is configured as any one of a rectangle, a U-shape, and a trapezoid.

7. The transverse flux machine according to claim 2, characterized in that The length of the fixing groove away from the side wall of the tooth waist is less than or equal to the length of the side wall close to the tooth waist.

8. The transverse flux machine according to claim 2, wherein: 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.

9. The transverse flux machine according to claim 1, wherein: The outer side wall and the inner side wall of the arc-shaped stator yoke are respectively formed by splicing a plurality of straight surfaces along the circumferential direction.

10. The transverse flux machine according to claim 2, characterized in that The outer side wall and the inner side wall of the arc-shaped stator yoke are arc surfaces, and the area on the arc surface that matches the stator teeth is recessed to form a slot structure that matches the side wall of the fixing slot. Wherein, the depth of the slot structure is the same as the thickness of the corresponding side portion.

11. The transverse flux machine according to claim 1, wherein: The stator core is formed from a single piece of steel by die-casting.

12. The transverse flux machine according to any one of claims 1 to 11, characterized in that The motor stator has n stator modules. When the number of phases of the motor is m, the number of stator modules in each phase is n / m.

13. The transverse flux machine according to any one of claims 1 to 11, characterized in that The motor rotor comprises: A plurality of arc-shaped rotor yokes can be arranged circumferentially to form an annular rotor yoke, wherein a plurality of magnetic steel positioning teeth are arranged circumferentially on the arc sidewalls of the arc-shaped rotor yoke, 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 grooves and can protrude from the magnetic steel positioning grooves.

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