Axial flux permanent magnet synchronous motor

Abstract

The application relates to a motor, in particular to the technical field of a synchronous motor with a permanent magnet, and discloses an axial flux permanent magnet synchronous motor which comprises a motor shell and an output shaft, a stator assembly is arranged in the motor shell, a rotor assembly is connected to the output shaft, the rotor assembly is arranged in the motor shell, a centrifugal assembly is arranged on the rotor assembly, the stator assembly comprises a stator ring, the stator ring is fixedly connected to the inner wall of the motor shell, through linkage cooperation of the stator ring, a winding slot, an arc-shaped plate and a permanent magnet one, instantaneous thrust is generated by the arc-shaped plate protruding end contacting the permanent magnet one, torque loss of a magnetic resistance dead point in the rotation process of the rotor is compensated, the problem that the rotor is fixedly easy to appear at a fixed point and the angle is rotated back in the existing axial flux permanent magnet synchronous motor is solved, and the structure limitation that the stator and rotor magnetic circuits cannot be adjusted in the prior art is different, and effective improvement of rotation smoothness in the low-speed rotation process of the rotor is realized.

Description

Technical Field

[0001] This invention relates to electric motors, and more specifically to the field of synchronous motor technology with permanent magnets, specifically an axial flux permanent magnet synchronous motor. Background Technology

[0002] With the continuous improvement of permanent magnet material performance and the gradual maturation of motor control technology, axial flux permanent magnet synchronous motors have been widely popularized and applied in civil equipment, industrial automation, power transmission and other fields due to their compact structure, high power density, small axial size and excellent electromagnetic utilization.

[0003] Conventional axial flux permanent magnet synchronous motors generally adopt a structure with a fixed stator slot layout and a fixed rotor permanent magnet mounting. The magnetic circuit distribution between the stator and rotor relies on the inherent iron core structure and permanent magnet arrangement to form a fixed matching relationship. During motor operation, an alternating current is applied to the stator winding to form a rotating magnetic field, which couples with the rotor permanent magnet magnetic field to achieve synchronous rotation. Currently, the overall structural design of similar motors used in the industry focuses on power output and spatial layout adaptation. They follow traditional design ideas in terms of electromagnetic coupling methods and magnetic circuit adjustment methods. There are no movable magnetic reluctance adjustment components on the stator side, and the permanent magnets on the rotor side are fixedly mounted by embedded or surface-mount methods. The overall operating characteristics of the machine depend entirely on the initial magnetic circuit parameters and the inherent structure of the iron core slots during production.

[0004] The fixed reluctance distribution of existing axial flux permanent magnet synchronous motors creates reluctance dead points in the rotor at specific angular positions. When the rotor passes these positions, torque loss easily occurs, leading to low-speed stalling and slight angular rotation, affecting the smoothness of operation at low speeds. Furthermore, the fixed stator reluctance distribution cannot compensate for torque pulsations caused by uneven magnetic circuits, easily resulting in rotational distortion during motor operation. Additionally, the rotor permanent magnets are fixedly installed, and the magnetic circuit coupling strength and effective flux area cannot adaptively adjust with speed changes. The magnetic circuit matching state differs between high and low speed conditions, making it impossible to ensure torque output stability across the entire speed range. Therefore, an axial flux permanent magnet synchronous motor is proposed to address the aforementioned problems. Summary of the Invention

[0005] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides an axial flux permanent magnet synchronous motor, which solves the problem of fixed stator cog reluctance in traditional axial flux permanent magnet synchronous motors, which easily leads to low-speed jamming and angular rotation due to the formation of magnetic reluctance dead points at specific rotational angles. It also solves the problem that existing motors lack a dynamic magnetic reluctance compensation structure, which cannot offset torque pulsation and rotational distortion caused by uneven magnetic circuit distribution. Furthermore, it solves the problem that the fixed arrangement of rotor permanent magnets cannot adaptively adjust the magnetic circuit coupling state with the rotational speed.

[0006] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: an axial flux permanent magnet synchronous motor, comprising a motor housing and an output shaft, a stator assembly installed inside the motor housing, a rotor assembly connected to the output shaft, the rotor assembly disposed inside the motor housing, a centrifugal assembly installed on the rotor assembly, the stator assembly comprising a stator ring fixedly connected to the inner wall of the motor housing, the inner wall of the stator ring having a winding groove and a recess, the inner wall of the recess having an arc-shaped sliding groove, one side of the arc-shaped sliding groove communicating with the inner wall of the winding groove, an arc-shaped plate slidably connected to the inner wall of the arc-shaped sliding groove, two levers symmetrically connected to the inner arc surface of the arc-shaped plate, a compensation plate provided on the inner wall of the recess, the compensation plate having an arc-shaped structure and two levers symmetrically connected to the outer arc surface, the center of the compensation plate rotatably connected to the inner wall of the recess, and a leaf spring symmetrically connected to the inner arc surface of the compensation plate.

[0007] Preferably, there are several leaf springs arranged equally along the centerline of the compensation plate, the first pawl contacts the second pawl on the same side, the arc-shaped plate has a magnetic pole on the side near the winding groove, and a winding is wound in the winding groove.

[0008] Preferably, there are six winding grooves arranged in a circular array at equal intervals within the stator ring. The groove, arc-shaped slide, arc-shaped plate, first pawl, compensation plate, second pawl, and leaf spring together form a single-sided compensation assembly. There are six single-sided compensation assemblies arranged in a circular array at equal intervals within the stator ring.

[0009] Preferably, the winding in the winding slot is attracted to the adjacent arc-shaped plate by their opposite magnetic poles.

[0010] Preferably, the windings in the winding slots and the magnetic poles of the adjacent arc-shaped plates are like poles and repel each other.

[0011] Preferably, the rotor assembly includes a rotor salient pole, one end of which is fixedly connected to a permanent magnet. The permanent magnet is positioned close to the winding slot and has an arc-shaped surface. A sliding groove is formed inside the rotor salient pole, and a sliding groove is formed on the arc surface of the permanent magnet. The sliding groove is connected to the sliding groove. Sliding grooves are symmetrically formed on both sides of the inner wall of the permanent magnet and are connected to the sliding groove.

[0012] Preferably, the centrifugal assembly includes a second permanent magnet, which is slidably connected to the inner wall of a second slide groove. The surface of the second permanent magnet is an arc-shaped structure. A limiting plate is fixedly connected to the bottom of the second permanent magnet. The two sides of the limiting plate are slidably connected to the inner walls of two third slide grooves. The arc-shaped surfaces of the second permanent magnet are symmetrically provided with notches that match the leaf springs. The inner walls of the notches are connected to arc-shaped leaf springs.

[0013] Preferably, a guide post is fixedly connected to the bottom of the limiting plate, the guide post is slidably connected to the inner wall of the slide groove, a guide groove is opened at the bottom of the guide post, a guide sleeve is slidably connected to the inner wall of the guide groove, a centrifugal ball is slidably arranged on the inner wall of the guide sleeve, the side of the guide sleeve away from the guide groove is fixedly connected to the inner wall of the slide groove, the centrifugal ball and the inner wall of the slide groove are attracted by opposite polarities, and a return spring is elastically connected between the guide post and the inner wall of the slide groove.

[0014] Preferably, the rotor assembly and the centrifugal assembly together form a single-sided magnetic flux assembly, and there are six single-sided magnetic flux assemblies arranged in a circular array at equal intervals within the stator ring.

[0015] Preferably, the rotor salient poles of the six single-sided magnetic flux assemblies are integrally connected and fixedly sleeved on the output shaft at their close ends, and the permanent magnets of the six single-sided magnetic flux assemblies are attracted to the windings of opposite polarities in the six winding slots respectively.

[0016] (III) Beneficial Effects Compared with the prior art, the present invention provides an axial flux permanent magnet synchronous motor, which has the following beneficial effects: 1. By linking the stator ring, winding slot, arc plate and permanent magnet one, the instantaneous thrust generated by the contact of the protruding end of the arc plate with permanent magnet one is used to compensate for the torque loss at the magnetic reluctance dead point during rotor rotation. This solves the problem of rotor fixed-point jamming and angle rotation that easily occur in existing axial flux permanent magnet synchronous motors due to the fixed tooth cogging magnetic reluctance. It is different from the structural limitations of the non-adjustable stator and rotor magnetic circuits in existing technologies, and effectively improves the smoothness of rotor rotation during low-speed operation.

[0017] 2. Through the mechanical transmission combination of groove, compensation plate, lever one, lever two and leaf spring, the arc plate is driven to slide by the winding magnetic field, which drives the compensation plate to deflect and change position. The leaf spring contacts the corresponding structure with the rotor in sequence to apply instantaneous thrust, which cancels the torque pulsation caused by uneven magnetic circuit distribution. This solves the rotational distortion problem caused by the lack of dynamic magnetic reluctance compensation structure in existing motors and realizes the adaptive adjustment of stator side magnetic reluctance and torque.

[0018] 3. By coordinating the rotational speeds of the rotor salient pole, the centrifugal ball inside the centrifugal assembly, the guide column, the return spring, and the second permanent magnet, the centrifugal force drives the components to slide and extend with the change in rotational speed. This allows the second permanent magnet to extend synchronously under high-speed conditions and contact the leaf spring and the arc-shaped leaf spring to generate instantaneous thrust. This solves the defect that the fixed arrangement of permanent magnets in existing motors cannot adapt to the requirements of high and low speed magnetic circuits, and achieves a stable and balanced torque output state under all motor speed conditions.

[0019] 4. By combining the six sets of single-sided magnetic flux components arranged in a circular array with the rotor salient pole integrated connection structure, the circumferential electromagnetic force and mechanical load are evenly distributed. In conjunction with the stator compensation structure and the rotor centrifugal magnetic adjustment structure, the problem of uneven magnetic pole force and prominent single-point magnetic reluctance dead point in existing multi-pole motors is solved, the phenomenon of rotor reciprocating at a specific angle is avoided, and the structural stability and synchronous operation performance of the whole machine are improved. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the motor housing of the present invention; Figure 3 This is a diagram showing the fit between the rotor assembly and the stator assembly of the present invention; Figure 4 This is a schematic diagram of the rotor salient pole structure of the present invention; Figure 5 This is a schematic diagram of the internal structure of the rotor salient pole of the present invention; Figure 6 This is an exploded view of the centrifuge assembly of the present invention; Figure 7 This is a schematic diagram of the stator assembly of the present invention; Figure 8 This is a planar sectional view of the stator ring of the present invention; Figure 9 This is a diagram showing the fit between the arc-shaped plate and the compensation plate of the present invention.

[0021] In the diagram: 1. Motor housing; 2. Output shaft; 3. Rotor assembly; 31. Rotor salient pole; 32. Permanent magnet one; 33. Slide groove one; 34. Slide groove two; 35. Slide groove three; 4. Centrifugal assembly; 41. Permanent magnet two; 42. Limiting plate; 43. Notch; 44. Arc-shaped leaf spring; 45. Guide post; 46. Guide groove; 47. Guide sleeve; 48. Centrifugal ball; 49. Return spring; 5. Stator assembly; 51. Stator ring; 52. Winding groove; 53. Groove; 54. Arc-shaped slide groove; 55. Arc-shaped plate; 56. Paddle one; 57. Compensation plate; 58. Paddle two; 59. Leaf spring. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see Figure 1 - Figure 9 The present invention provides an axial flux permanent magnet synchronous motor, including a motor housing 1 and an output shaft 2. A stator assembly 5 is installed inside the motor housing 1, and a rotor assembly 3 is connected to the output shaft 2. The rotor assembly 3 is disposed inside the motor housing 1, and a centrifugal assembly 4 is installed on the rotor assembly 3.

[0024] When in use, the stator assembly 5 inside the motor housing 1 is connected to an alternating current to generate a magnetic field. The rotor assembly 3 and the stator assembly 5 form an electromagnetic coupling, which drives the output shaft 2 to rotate. During the rotation of the rotor assembly 3, the centrifugal assembly 4 is driven to operate synchronously. The centrifugal assembly 4 generates mechanical sliding displacement as the speed changes. In conjunction with the compensation structure of the stator assembly 5, it adjusts the air gap magnetic circuit and electromagnetic torque, and suppresses the rotor from jamming and slewing at a fixed angle.

[0025] In this invention, the stator assembly 5 includes a stator ring 51, which is fixedly connected to the inner wall of the motor housing 1. The inner wall of the stator ring 51 is provided with a winding groove 52 and a recess 53, such as... Figure 8 As shown, the winding groove 52 and the recess 53 are arranged at intervals along the circumference of the stator ring 51. An arc-shaped sliding groove 54 is formed on the inner wall of the recess 53. One side of the arc-shaped sliding groove 54 is connected to the inner wall of the winding groove 52. An arc-shaped plate 55 is slidably connected to the inner wall of the arc-shaped sliding groove 54. Two levers 56 are symmetrically connected to the inner arc surface of the arc-shaped plate 55. A compensation plate 57 is provided on the inner wall of the recess 53. The compensation plate 57 has an arc-shaped structure, and two levers 58 are symmetrically connected to its outer arc surface. The outer arc surface of the compensation plate 57 faces the inner arc surface of the arc-shaped plate 55. The inner arc surface faces the opening of the groove 53. The center of the compensating plate 57 is rotatably connected to the inner wall of the groove 53. A leaf spring 59 is symmetrically connected to the inner arc surface of the compensating plate 57. Several leaf springs 59 are evenly spaced along the centerline of the compensating plate 57. One of the levers 56 on the arc-shaped plate 55 contacts a lever 58 on the same side of the compensating plate 57, while the lever 56 on the other arc-shaped plate 55 does not contact the other lever 58 on the compensating plate 57. Furthermore, the distance between the two levers 56 is less than the distance between the two levers 58. Figure 8As shown, the arc-shaped plate 55 has a magnetic pole on the side near the winding groove 52. The side of the arc-shaped plate 55 with the magnetic pole is located at the connection between the winding groove 52 and the arc-shaped slide 54. Each winding groove 52 is only connected to the arc-shaped slide 54 in the clockwise direction and is not connected in the counterclockwise direction. A winding is wound in the winding groove 52. There are six winding grooves 52, which are arranged in a circular array at equal intervals in the stator ring 51. The groove 53, the arc-shaped slide 54, the arc-shaped plate 55, the first lever 56, the compensation plate 57, the second lever 58, and the leaf spring 59 together form a single-sided compensation assembly. There are six single-sided compensation assemblies, which are arranged in a circular array at equal intervals in the stator ring 51.

[0026] When in use, the winding in the winding slot 52 is energized to generate a magnetic field. The arc plate 55 relies on its own magnetic pole and the magnetic field of the winding to generate a magnetic force and slides along the arc-shaped slide groove 54. The arc plate 55 drives the first pawl 56 to move. The first pawl 56 and the second pawl 58 make contact and drive the compensation plate 57 to rotate around its own center. After the compensation plate 57 rotates, the end protrusion position changes. The leaf spring 59 changes position synchronously with the compensation plate 57 to adjust the local magnetic resistance of the stator and the clearance space, and adapt to the circumferential rotation of the rotor salient pole 31 and the permanent magnet 32.

[0027] In this embodiment, the winding in the winding groove 52 is attracted to the adjacent arc-shaped plate 55 by their opposite magnetic poles.

[0028] When in use, the winding inside the winding slot 52 is energized to form a magnetic field. The magnetic field of the winding and the magnetic pole of the arc plate 55 form an opposite magnetic attraction, which limits the sliding stroke of the arc plate 55 in the arc-shaped slide groove 54, fixes the relative position of the first pawl 56 and the second pawl 58, keeps the compensation plate 57 at a stable deflection angle, and maintains the stable electromagnetic coupling state between the stator and the rotor.

[0029] Furthermore, the windings in the winding slot 52 and the magnetic poles of the adjacent arc-shaped plate 55 repel each other.

[0030] When in use, the winding inside the winding slot 52 is energized to form a magnetic field. The magnetic field of the winding and the magnetic poles of the arc plate 55 form a repulsive force. The repulsive force pushes the arc plate 55 to slide along the arc-shaped slide groove 54. Through the first lever 56 and the second lever 58, the compensation plate 57 is deflected, which changes the local magnetic resistance distribution in the circumferential direction of the stator and weakens the torque fluctuation caused by the sudden change in magnetic resistance.

[0031] It is worth noting that the rotor assembly 3 includes a rotor salient pole 31, one end of which is fixedly connected to a permanent magnet 32. The permanent magnet 32 ​​is positioned near the winding slot 52, and its surface is arc-shaped. A sliding groove 33 is formed inside the rotor salient pole 31, and a second sliding groove 34 is formed on the arc surface of the permanent magnet 32. The first and second sliding grooves 34 are connected. Sliding grooves 35 are symmetrically formed on both sides of the inner wall of the permanent magnet 32, and both sliding grooves 35 are connected to the second sliding groove 34. The centrifugal assembly 4 includes a second permanent magnet 41, which is slidably connected to the inner wall of the second sliding groove 34. The surface of the second permanent magnet 41 is also arc-shaped. Figure 4 , Figure 5 As shown, in the initial state, the arc surface of permanent magnet 2 41 and the arc surface of permanent magnet 1 32 can jointly form a continuous, smooth, and uniformly curved arc surface. A limiting plate 42 is fixedly connected to the bottom of permanent magnet 2 41. The two sides of the limiting plate 42 are slidably connected to the inner walls of two sliding grooves 35. Symmetrical notches 43 matching leaf springs 59 are opened on both sides of the arc surface of permanent magnet 2 41. Arc-shaped leaf springs 44 are connected to the inner walls of the notches 43. The bottom of the limiting plate 42 is fixedly connected to... A guide post 45 is slidably connected to the inner wall of the slide groove 33. A guide groove 46 is provided at the bottom of the guide post 45. A guide sleeve 47 is slidably connected to the inner wall of the guide groove 46. A centrifugal ball 48 is slidably provided on the inner wall of the guide sleeve 47. The side of the guide sleeve 47 away from the guide groove 46 is fixedly connected to the inner wall of the slide groove 33. The centrifugal ball 48 and the inner wall of the slide groove 33 are attracted by opposite polarities. A return spring 49 is elastically connected between the guide post 45 and the inner wall of the slide groove 33.

[0032] In use, the output shaft 2 drives the rotor salient pole 31 to rotate. The permanent magnet 32 ​​forms an electromagnetic coupling with the stator winding slot 52 along with the rotor salient pole 31. Under low-speed conditions, the centrifugal ball 48 maintains magnetic adsorption with the inner wall of the slide groove 33. The return spring 49 keeps the guide post 45, the limiting plate 42, and the permanent magnet 41 in a retracted state. After the speed increases, the centrifugal force of the centrifugal ball 48 overcomes the magnetic adsorption force, slides along the guide sleeve 47, and pushes the guide post 45 to stretch the return spring 49. The guide post 45 drives the limiting plate 42 and the permanent magnet 41 to slide along the slide groove 34 and the slide groove 35, so that the permanent magnet 41 moves outward and the notch 43 is exposed. The leaf spring 59 can be embedded in the notch 43 and elastically contact the arc-shaped leaf spring 44 to realize magnetic circuit and mechanical torque compensation at high speed.

[0033] It is worth noting that the rotor assembly 3 and the centrifugal assembly 4 together form a single-sided magnetic flux assembly. There are six single-sided magnetic flux assemblies. The six single-sided magnetic flux assemblies are arranged in a circular array at equal intervals in the stator ring 51. The rotor salient poles 31 in the six single-sided magnetic flux assemblies are integrally connected and fixedly sleeved on the output shaft 2 at their close ends. The permanent magnets 32 in the six single-sided magnetic flux assemblies are attracted to the windings of opposite polarities in the six winding slots 52 respectively.

[0034] In use, six sets of single-sided magnetic flux components are evenly distributed in a circular array inside the stator ring 51, and six rotor salient poles 31 are integrally fixed on the output shaft 2 to ensure rotor coaxiality and smooth operation. Each permanent magnet 32 ​​forms opposite magnetic attraction coupling with the winding in the corresponding winding slot 52. The stator winding switches magnetic poles in sequence to continuously drive the rotor to rotate in one direction. When the rotor passes through the groove 53, the stator compensation component is activated to compensate for the instantaneous torque difference and suppress the rotor from rotating distortion and swirl at a specific angle.

[0035] Working principle: An alternating current is passed through the stator assembly 5 inside the motor housing 1 to form a spatial rotating magnetic field. The rotor assembly 3 is fixedly mounted on the output shaft 2. The permanent magnet 32 ​​fixed at the end of the rotor salient pole 31 forms an electromagnetic synchronous coupling with the winding inside the stator winding slot 52, driving the output shaft 2 to rotate continuously. Six sets of single-sided compensation components are arranged in a circular array on the stator ring 51. After the winding of the winding slot 52 is energized, the arc-shaped plate 55 generates magnetic attraction or repulsion with the magnetic field of the winding due to its own magnetic pole, driving the arc-shaped plate 55 to move along the arc-shaped sliding groove 54. As the rotor slides, the arc-shaped plate 55 drives the first pawl 56 to move synchronously. Through the mechanical transmission between the first pawl 56 and the second pawl 58, the compensation plate 57 is pushed to deflect around its own center. The compensation plate 57 drives the leaf spring 59 to move synchronously. During the sliding process, the arc-shaped plate 55 directly contacts the permanent magnet 32 ​​with its protruding end, applying a circumferential instantaneous thrust to the rotor magnetic poles to make up for the torque loss at the magnetic reluctance dead point. At the same time, the leaf spring 59 contacts the rotor side structure and applies instantaneous thrust as the rotor rotates, further smoothing the rotor rotation angle force.

[0036] During the rotation of the rotor with the output shaft 2, the internal groove 33 of the rotor salient pole 31, the groove 34 of the permanent magnet 32, and the groove 35 are interconnected, providing a defined sliding trajectory for the centrifugal assembly 4. Under low-speed conditions, the centrifugal ball 48 maintains magnetic attraction with the inner wall of the groove 33. With the elastic constraint of the return spring 49, the guide post 45, the limiting plate 42, and the permanent magnet 41 are housed inside the groove 34, with only the permanent magnet 32 ​​participating in the main magnetic circuit coupling. When the speed increases, the centrifugal force on the centrifugal ball 48 overcomes the magnetic attraction force and moves along the... The inner wall of the guide sleeve 47 slides and pushes against the guide groove 46, causing the guide column 45 to stretch the reset spring 49 to slide along the first slide groove 33. After being limited and guided by the limiting plate 42 in the third slide groove 35, the permanent magnet 41 is pushed to move outward along the second slide groove 34, so that the notch 43 is fully exposed. When the rotor continues to rotate, the stator side leaf spring 59 is embedded in the notch 43. The leaf spring 59 and the arc-shaped leaf spring 44 in the notch 43 contact each other. The two rely on the contact cooperation to apply a circumferential instantaneous thrust to the rotor, which counteracts the torque pulsation and angular offset under high-speed conditions.

[0037] Six sets of single-sided magnetic flux components, consisting of rotor assembly 3 and centrifugal assembly 4, are arranged in an equidistant array along the circumference. The six rotor salient poles 31 are integrally connected and fixedly sleeved on the output shaft 2 to ensure the coaxiality and dynamic balance accuracy of the rotor. Each permanent magnet 32 ​​and the corresponding winding slot 52 maintain opposite magnetic attraction coupling. The windings alternate poles according to the phase sequence to maintain the unidirectional continuous rotation of the rotor.

[0038] The arc-shaped plate 55 is driven to slide by magnetic force, and its protruding end contacts the permanent magnet 32 ​​to output instantaneous thrust. Then, the instantaneous thrust is applied step by step through the linkage of the compensating plate 57, the leaf spring 59, and the rotor-side arc-shaped leaf spring 44. At low speeds, the stator movable components contact to compensate for the thrust torque, while at high speeds, the centrifugal component 4 extends adaptively to contact and push against the elastic leaf spring. Combined with the six-pole evenly distributed structure to evenly distribute electromagnetic and mechanical loads, the rotor fixed-point force gap is continuously eliminated. From the structure and principle, specific angle rotation, vibration and operation distortion are avoided, and the torque is continuously stable and the operation synchronization is improved throughout the entire speed range.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. An axial flux permanent magnet synchronous motor, comprising a motor housing (1) and an output shaft (2), characterized in that: A stator assembly (5) is installed inside the motor housing (1), and a rotor assembly (3) is connected to the output shaft (2). The rotor assembly (3) is disposed inside the motor housing (1), and a centrifugal assembly (4) is installed on the rotor assembly (3). The stator assembly (5) includes a stator ring (51), which is fixedly connected to the inner wall of the motor housing (1). The inner wall of the stator ring (51) is provided with a winding groove (52) and a recess (53). The inner wall of the recess (53) is provided with an arc-shaped sliding groove (54). One side of the arc groove (54) is connected to the inner wall of the winding groove (52). The inner wall of the arc groove (54) is slidably connected to an arc plate (55). The inner arc surface of the arc plate (55) is symmetrically connected to two paddles (56). The inner wall of the groove (53) is provided with a compensation plate (57). The compensation plate (57) is an arc structure and the outer arc surface is symmetrically connected to two paddles (58). The center of the compensation plate (57) is rotatably connected to the inner wall of the groove (53). The inner arc surface of the compensation plate (57) is symmetrically connected to a leaf spring (59).

2. The axial flux permanent magnet synchronous motor according to claim 1, characterized in that: The number of leaf springs (59) is several and they are evenly distributed along the center line of the compensation plate (57). The first pawl (56) is in contact with the second pawl (58) on the same side. The arc plate (55) has a magnetic pole on the side near the winding groove (52). The winding groove (52) is wound with a winding.

3. The axial flux permanent magnet synchronous motor according to claim 2, characterized in that: The number of the winding grooves (52) is six and they are arranged in a circular array at equal intervals in the stator ring (51). The groove (53), the arc-shaped slide (54), the arc plate (55), the first pawl (56), the compensation plate (57), the second pawl (58), and the leaf spring (59) together form a single-sided compensation component. The number of the single-sided compensation components is six and they are arranged in a circular array at equal intervals in the stator ring (51).

4. An axial flux permanent magnet synchronous motor according to claim 3, characterized in that: The winding in the winding slot (52) is attracted to the adjacent arc plate (55) by the opposite magnetic poles.

5. An axial flux permanent magnet synchronous motor according to claim 3, characterized in that: The winding in the winding slot (52) and the magnetic poles of the adjacent arc plate (55) are repulsive to each other.

6. The axial flux permanent magnet synchronous motor according to claim 1, characterized in that: The rotor assembly (3) includes a rotor salient pole (31), one end of which is fixedly connected to a permanent magnet (32). The permanent magnet (32) is located near the winding groove (52). The surface of the permanent magnet (32) is an arc-shaped structure. A sliding groove (33) is provided inside the rotor salient pole (31). A sliding groove (34) is provided on the arc surface of the permanent magnet (32). The sliding groove (33) and the sliding groove (34) are connected. A sliding groove (35) is symmetrically provided on both sides of the inner wall of the permanent magnet (32). The sliding groove (35) is connected to the sliding groove (34).

7. An axial flux permanent magnet synchronous motor according to claim 6, characterized in that: The centrifugal assembly (4) includes a second permanent magnet (41), which is slidably connected to the inner wall of the second slide groove (34). The surface of the second permanent magnet (41) is an arc structure. A limiting plate (42) is fixedly connected to the bottom of the second permanent magnet (41). The two sides of the limiting plate (42) are slidably connected to the inner walls of two third slide grooves (35). The arc surfaces of the second permanent magnet (41) are symmetrically provided with notches (43) that match the leaf springs (59). The inner walls of the notches (43) are connected to arc-shaped leaf springs (44).

8. An axial flux permanent magnet synchronous motor according to claim 7, characterized in that: The bottom of the limiting plate (42) is fixedly connected to a guide post (45), the guide post (45) is slidably connected to the inner wall of the first slide groove (33), the bottom of the guide post (45) is provided with a guide groove (46), the inner wall of the guide groove (46) is slidably connected to a guide sleeve (47), the inner wall of the guide sleeve (47) is slidably provided with a centrifugal ball (48), the side of the guide sleeve (47) away from the guide groove (46) is fixedly connected to the inner wall of the first slide groove (33), the centrifugal ball (48) and the inner wall of the first slide groove (33) are attracted by opposite polarities, and a return spring (49) is elastically connected between the guide post (45) and the inner wall of the first slide groove (33).

9. An axial flux permanent magnet synchronous motor according to claim 8, characterized in that: The rotor assembly (3) and the centrifugal assembly (4) together form a single-sided magnetic flux assembly. There are six single-sided magnetic flux assemblies, which are arranged in a circular array at equal intervals within the stator ring (51).

10. An axial flux permanent magnet synchronous motor according to claim 9, characterized in that: The rotor salient poles (31) of the six single-sided magnetic flux assemblies are integrally connected and fixedly sleeved on the output shaft (2) at their close ends. The permanent magnets (32) of the six single-sided magnetic flux assemblies are attracted to the windings of opposite polarity in the six winding slots (52).

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