Annular winding hybrid excitation motor structure for improving torque by using stator and rotor leakage flux

Abstract

The invention discloses an annular winding hybrid excitation motor structure for improving torque by using stator and rotor leakage flux. The annular winding hybrid excitation motor structure comprises a leakage flux approach bridge, an arch-shaped magnetic flux approach bridge and a magnetic flux torque adjusting winding, each phase of the stator annular winding is provided with an arch-shaped magnetic flux approach bridge; the magnetic leakage approach bridges extend to the arch-shaped magnetic flux approach bridges from the surfaces of the rotor pole regions, adjusting grooves are formed in the surfaces of the rotor pole regions, bridge tails of the magnetic leakage approach bridges are installed in the adjusting grooves in a sliding mode through convex teeth, magnetic leakage approach bridge position adjusting and fixing mechanisms are arranged in a matched mode, and the positions of the magnetic leakage approach bridges and the arch-shaped magnetic flux approach bridges are adjusted through the adjusting grooves. Therefore, the axial leakage flux power angle is changed, and the torque is adjusted. And meanwhile, a magnetic flux torque adjusting winding is arranged in the motor end cover, so that the torque can be increased and adjusted. According to the hybrid excitation motor, the permanent magnet leakage flux and the axial leakage flux of the stator winding can be fully utilized to generate torque, the torque is adjusted through the adjusting grooves and the magnetic flux torque adjusting winding, and the performance and efficiency of the hybrid excitation motor are improved.

Description

Technical Field

[0001] The invention relates to the technical field of hybrid excitation motors, and in particular to a ring-shaped winding hybrid excitation motor structure which utilizes stator and rotor leakage magnetic flux to increase torque. Background Art

[0002] With the continuous advancement of modern industry, the requirements for motor performance and efficiency are becoming more and more stringent. Although hybrid excitation motors have certain advantages, their existing structures still have many shortcomings.

[0003] Among them, the stator winding space is not fully and efficiently utilized, resulting in low motor efficiency. The most critical issue is the magnetic flux leakage between the stator and rotor. The current motor structure cannot effectively utilize the magnetic flux leakage between the stator and rotor, which not only leads to a significant reduction in motor torque, but also seriously affects the running stability of the motor. In addition, the excitation regulation method has limitations, which can only adjust the magnetic flux but cannot provide torque.

[0004] In this context, the applicant proposes a toroidal winding hybrid excitation motor structure that utilizes stator and rotor leakage flux to increase torque, so as to overcome existing defects and improve motor performance and reliability. Summary of the invention

[0005] The object of the present invention is to provide a ring-shaped winding hybrid excitation motor structure which utilizes stator and rotor leakage magnetic flux to increase torque.

[0006] In order to achieve the above-mentioned invention object, the present invention adopts the following technical scheme: The structure of a ring-shaped winding hybrid excitation motor that utilizes stator-rotor leakage flux to increase torque includes a motor end cover, a rotor, permanent magnets distributed on the rotor, a stator core, and a stator ring-shaped winding, and also includes a leakage flux bridge, an arched flux bridge, and a flux torque regulating winding; An arched flux bridge is installed on each phase of the stator annular winding, the arched flux bridge half-wraps the stator annular winding in each phase, and both ends of the arched flux bridge are fixedly connected to the stator core; The rotor end forms a rotor pole region between two permanent magnets, and the number of leakage flux bridges corresponds to the rotor pole region; the leakage flux bridge extends from the surface of the rotor pole region to the arched flux bridge on the end of the stator annular winding; the surface of the rotor pole region is provided with an arc-shaped adjustment groove concentric therewith, the tail of the leakage flux bridge is slidably installed in the adjustment groove through a convex tooth, and the bridge head of the leakage flux bridge is gap-matched with the arched flux bridge; One end of the arc of the convex tooth is set as an inclined surface, and a number of round balls are arranged in the adjustment groove on the inclined surface side. A spring is connected to the other end of the arc of the convex tooth, and the other end of the spring is connected to the end of the adjustment groove to form a leakage magnetic bridge position adjustment and fixing mechanism; When the rotor is in its original static state, the leakage magnetic induction bridge is on one side of the ball, and the spring is in its original state. At this time, the convex teeth of the leakage magnetic induction bridge are not subjected to force; when the rotor accelerates in the clockwise direction, the leakage magnetic induction bridge will move along the ball direction due to the need to maintain its original static state. At this time, the spring stretches. When the motor speed stabilizes, the spring wants to maintain its original state and will generate a contraction force to pull the leakage magnetic induction bridge back to its original static position; when the position of the leakage magnetic induction bridge needs to be adjusted, the rotor speed is reduced, and the leakage magnetic induction bridge maintains its original state due to inertia When the rotor speed is stable, the spring is in a compressed state. The ball squeezes the convex teeth of the leakage magnetic induction bridge and compresses the inclined surface of the convex teeth. When the rotor speed is stable, the spring is in a compressed state. The ball squeezes the inclined surface of the convex teeth to increase the support force of the adjusting slot wall on the convex teeth. The centrifugal force on the leakage magnetic induction bridge also increases the support force of the adjusting slot on the convex teeth. The superposition of the two supporting forces will increase the friction between the adjusting teeth and the adjusting slot wall. At this time, the friction force is greater than the elastic force of the spring, so that the leakage magnetic induction bridge is fixed inside the adjusting slot, thereby realizing the automatic adjustment of the position of the leakage magnetic induction bridge. A flux torque regulating winding is provided inside the motor end cover; the outer diameter of the motor end cover is consistent with the outermost circle of the leakage flux bridge, the inside of the motor end cover is slotted opposite to the stator annular winding part and the flux torque regulating winding is arranged, and single-phase alternating current is passed to realize flux torque regulation.

[0007] Furthermore, the cross section of the protruding tooth is an inverted "T" shape.

[0008] Furthermore, the bridge head of the leakage flux bridge is provided with an arched groove, and the arched groove is clamped on the outside of the arched flux bridge.

[0009] Furthermore, each rotor pole region is provided with more than two adjustment slots, and the adjustment slots are arranged at intervals in the radial direction.

[0010] Furthermore, the magnetic flux leakage bridge is made of cast iron material.

[0011] Furthermore, the arched flux bridge is made of cast iron material.

[0012] The beneficial effects of the present invention are: 1. The arrangement of the arched flux bridge in the present invention can concentrate the axial leakage flux of the stator annular winding, and interlink the leakage flux guided from the rotor through the arched flux bridge and the leakage flux bridge.

[0013] 2. The leakage flux bridge of the present invention is provided to guide the leakage flux generated between the stator and the rotor. The leakage flux bridge extends from the rotor surface to the arched flux bridge on the end of the stator annular winding, forming a low magnetic resistance path. With its high magnetic permeability, the leakage flux bridge effectively guides the leakage flux that may have been dissipated in the axial polar region to the leakage flux bridge path. Through the guidance of the leakage flux bridge, the leakage flux can be concentrated inside and on the surface of the leakage flux bridge to enhance the magnetic field strength around the stator annular winding, thereby improving the torque output of the motor. At the same time, the leakage flux bridge can correct and reduce the length of the leakage flux bridge and the axial stator air gap, reducing the loss of magnetic flux in magnetic resistance.

[0014] The leakage flux bridge can also change the axial leakage flux power angle and adjust the torque by automatically adjusting the position of the leakage flux bridge and the arched flux bridge through the adjusting slot in the rotor pole region.

[0015] In summary, the leakage flux bridge can effectively utilize the leakage flux of the permanent magnet and the axial leakage flux generated by the stator annular winding, and adjust the torque by adjusting the slot and the flux torque regulating winding, thereby improving the performance and efficiency of the hybrid excitation motor. The setting of the leakage flux bridge further optimizes the magnetic circuit, which can not only efficiently guide the stator and rotor leakage flux, but also enhance the coupling effect of the magnetic field, so that the motor can maintain stable performance output under different working conditions.

[0016] 3. The leakage magnetic bridge position adjustment and fixing mechanism of the present invention realizes position adjustment and fixing through the spring and the ball in the adjustment slot, wherein the ball realizes fixing and the spring is responsible for adjusting the position of the leakage magnetic bridge. When the rotor speed changes, different accelerations are provided. According to the different accelerations, the number of balls will change to fix the leakage magnetic bridge at all times. The cooperation between the ball and the inclined surface on the convex tooth greatly increases the force of squeezing the leakage magnetic bridge and facilitates the fixing of the leakage magnetic bridge.

[0017] 4. In the present invention, the leakage flux bridge head is provided with an arched groove, so that it is just stuck outside the arched flux bridge at the stator annular winding, which can reduce the axial air gap and make up for the unevenness of the air gap, thereby better guiding the leakage flux and increasing the utilization rate of the leakage flux. 5. The leakage magnetic induction bridge of the present invention is integrally forged from cast iron material, and has an inverted "T"-shaped convex tooth at the end of the bridge, so that it can be installed in the adjustment slot between the permanent magnets at the end of the rotor, so that the leakage magnetic induction bridge rotates with the rotor.

[0018] 6. The flux torque regulating winding provided inside the motor end cover of the present invention can realize the increase and regulation of torque, and plays a vital role in the magnetic field regulation of the motor. After the alternating current is passed into the flux torque regulating winding, magnetic flux is generated, which enhances the axial magnetic flux, can couple and regulate the magnetic flux generated between the stator and rotor, and generate torque to improve the motor performance; it can also be achieved by changing the current size and phase in the flux torque regulating winding to improve the performance and efficiency of the hybrid excitation motor.

[0019] The flux torque regulating winding inside the end cover provides a flexible means for regulating the magnetic field of the motor. It can accurately adjust the output characteristics of the motor according to actual needs, adapt to different load changes and working environments, and has stronger adaptability and flexibility to meet the requirements of various complex application scenarios.

[0020] 7. The present invention adopts a stator annular winding, and the arch bridge gathers the leakage magnetic flux generated by the annular winding, which interacts with the magnetic field generated by the permanent magnet guided by the leakage magnetic bridge through the air gap between the arch bridge and the leakage magnetic bridge. The structure is simple, which reduces the manufacturing difficulty and cost.

[0021] 8. The present invention can fully utilize the leakage flux of the permanent magnet and the axial leakage flux of the stator winding to generate torque, and adjust the torque by adjusting the slot and the flux torque adjusting winding, thereby improving the performance and efficiency of the hybrid excitation motor.

[0022] The present invention greatly improves the torque output capacity of the motor by effectively guiding and utilizing the stator and rotor leakage magnetic flux. Compared with the traditional motor structure, it can achieve higher efficiency and greater output power under the same volume and input power.

[0023] This motor structure also has positive significance in energy conservation and emission reduction, can reduce energy consumption and environmental pollution, and contribute to sustainable development. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a partial structural diagram of the hybrid excitation motor; Figure 2 It is a schematic diagram of the motor end cover of the hybrid excitation motor; Figure 3 It is a schematic diagram of the leakage magnetic bridge; Figure 4 This is the installation diagram of the magnetic leakage approach bridge; Figure 5 It is the installation diagram of the arch type magnetic flux bridge; Figure 6 Guide the leakage flux map for the leakage flux bridge; Figure 7 The overall schematic diagram of the hybrid excitation motor after removing the end cover Figure 8 The schematic diagram of the arrangement of the adjustment slots at the rotor end; Fig. 9 It is an enlarged schematic diagram of the position adjustment and fixing mechanism of the leakage magnetic bridge; Fig.10 A cross-sectional view of the convex teeth installed in the adjustment groove; Fig.11 This is a schematic diagram of the arrangement of steel balls in the leakage magnetic bridge position adjustment and fixing mechanism;.

[0025] The reference numerals of the components in the figure are as follows: 1-motor end cover, 2-axial flux torque regulating winding, 3-leakage flux bridge, 4-arched flux bridge, 5-stator ring winding, 6-regulating slot, 7-stator core, 8-permanent magnet, 9-rotor, 10-convex teeth, 11-steel balls, 12-spring.

[0026] The drawings are only used for illustrative purposes and should not be construed as limitations on this patent. In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. DETAILED DESCRIPTION

[0027] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. In order to clearly express the structural composition of the present invention, the accompanying drawings only show the relevant schematic diagram of the position of one end of the motor, and the other end of the motor is a symmetrical structure, which is no longer shown in the accompanying drawings.

[0028] like Figures 1 to 11 As shown, this embodiment provides a ring-shaped winding hybrid excitation motor structure that utilizes stator and rotor leakage flux to increase torque, including a motor end cover 1, a rotor 9, permanent magnets 8 distributed on the rotor 9, a stator core 7, a stator ring-shaped winding 5, a leakage flux bridge 3, an arched flux bridge 4 and a flux torque regulating winding 2.

[0029] Each phase of the stator annular winding 5 is equipped with an arched flux bridge 4, which half-wraps the stator annular winding 5 in each phase, and both ends of the arched flux bridge 4 are fixedly connected to the stator core. In this embodiment, the arched flux bridge 4 half-wraps two stator annular windings 5.

[0030] The end of the rotor 9 forms a rotor pole region (including an N pole region and an S pole region) between two permanent magnets, and the number of leakage magnetic bridges 3 corresponds to the rotor pole region. The leakage magnetic bridge 3 extends from the surface of the rotor pole region to the arched magnetic flux bridge 4 on the end of the stator annular winding. Specifically, the surface of the rotor pole region is provided with an arc-shaped adjustment groove 6 concentric therewith, and the bridge tail of the leakage magnetic bridge 3 is slidably installed in the adjustment groove 6 through the convex teeth 10. The bridge head of the leakage magnetic bridge 3 is gap-matched with the arched magnetic flux bridge 4.

[0031] In this embodiment, the cross section of the convex tooth is an inverted "T" shape, so that it can be installed in the adjustment slot 6 between the permanent magnets at the end of the rotor, so that the leakage flux bridge 3 rotates with the rotor.

[0032] One arc end of the convex tooth 10 is set as an inclined surface, and a number of steel balls 11 are arranged in the adjustment groove on the inclined surface side. A spring 12 is connected to the other arc end of the convex tooth 10, and the other end of the spring 12 is connected to the end of the adjustment groove, thereby forming a leakage magnetic bridge position adjustment and fixing mechanism.

[0033] The working principle of the magnetic bridge position adjustment and fixing mechanism is as follows: When the rotor 9 is in the original stationary state, the leakage flux bridge 3 is located on one side of the steel ball 11, and the spring 12 is in the original state. At this time, the protruding teeth 10 of the leakage flux bridge 3 are not subjected to force.

[0034] When the rotor 9 accelerates in the clockwise direction, the leakage flux bridge 3 needs to maintain its original static state and will move in the direction of the steel ball. At this time, the spring 12 stretches. When the motor speed stabilizes, the spring 12 wants to maintain its original state and will generate a contraction force to pull the leakage flux bridge 3 back to its original static position.

[0035] When it is necessary to adjust the position of the leakage magnetic bridge 3, the speed of the rotor 9 is reduced. The leakage magnetic bridge 3 remains in its original state due to inertia, and will squeeze the spring 12 to produce compression deformation. The steel ball also moves toward the convex tooth 10 of the leakage magnetic bridge 3 and compresses the inclined surface of the convex tooth 10; when the rotor speed is stable, the spring 12 is in a compressed state. Since the steel ball 11 squeezes the inclined surface of the convex tooth 10, the supporting force of the wall of the adjustment slot 6 on the convex tooth 10 is increased, and the centrifugal force exerted on the leakage magnetic bridge 3 also increases the supporting force of the adjustment slot 6 on the convex tooth 10. The superposition of the two supporting forces will greatly increase the friction between the convex tooth 10 and the wall of the adjustment slot 6. At this time, the friction force is much greater than the elastic force of the spring, so that the leakage magnetic bridge 3 is fixed inside the adjustment slot 6, thereby realizing automatic adjustment of the position of the leakage magnetic bridge.

[0036] In order to achieve stable position adjustment of the leakage magnetic bridge, two adjustment slots 6 are provided on each rotor pole region, and the two adjustment slots 6 are arranged radially at intervals. Each adjustment slot 6 is provided with corresponding convex teeth and a magnetic bridge position adjustment and fixing mechanism.

[0037] The bridge head of the leakage flux bridge 3 is provided with an arched groove, which can be just gap-stuck outside the arched flux bridge 4 at the stator annular winding, which can reduce the axial air gap and compensate for the unevenness of the air gap, thereby better guiding the leakage flux and increasing the leakage flux utilization rate.

[0038] In this embodiment, the leakage flux bridge 3 and the arched flux bridge 4 are both made of cast iron material.

[0039] The working principles of the leakage flux bridge 3 and the arched flux bridge 4 in the present invention are as follows: The arched flux bridge 4 can concentrate the axial leakage flux of the stator annular winding, and interlink the leakage flux guided from the rotor through the arched flux bridge 4 and the leakage flux bridge 3 .

[0040] The leakage flux bridge 3 is used to guide the leakage flux generated between the stator and the rotor. The leakage flux bridge 3 extends from the rotor surface to the arched flux bridge 4 on the end of the stator annular winding, forming a low magnetic resistance path. With its high magnetic permeability, the leakage flux bridge 3 effectively guides the leakage flux that may have been dissipated in the axial polar region to the path of the leakage flux bridge 3. Through the guidance of the leakage flux bridge 3, the leakage flux can be concentrated inside and on the surface of the leakage flux bridge 3 to enhance the magnetic field strength around the stator annular winding, thereby improving the torque output of the motor. At the same time, the leakage flux bridge 3 can correct and reduce the length of the leakage flux bridge 3 and the axial stator air gap, reducing the loss of magnetic flux in magnetic resistance.

[0041] The leakage flux bridge 3 can also automatically adjust the positions of the leakage flux bridge 3 and the arched flux bridge 4 by adjusting the slots in the rotor pole region to change the axial leakage flux power angle and adjust the torque.

[0042] In summary, the leakage flux bridge 3 can effectively utilize the axial leakage flux generated by the permanent magnet leakage and the stator annular winding, and adjust the torque by adjusting the slot and the flux torque regulating winding, thereby improving the performance and efficiency of the hybrid excitation motor. The setting of the leakage flux bridge 3 further optimizes the magnetic circuit, which can not only efficiently guide the stator and rotor leakage flux, but also enhance the coupling effect of the magnetic field, so that the motor can maintain stable performance output under different working conditions.

[0043] In addition, the present invention further provides a flux torque regulating winding 2 inside the motor end cover 1. The outer diameter of the motor end cover 1 is consistent with the outermost circle of the leakage flux bridge 3, and the motor end cover 1 is slotted in the stator annular winding part and the flux torque regulating winding 2 is arranged, and single-phase alternating current is passed to realize flux torque regulation.

[0044] The flux torque regulating winding 2 arranged inside the motor end cover 1 can realize the increase and regulation of torque, and plays a vital role in the magnetic field regulation of the motor. After the alternating current is passed through the flux torque regulating winding 2, a magnetic flux is generated, which enhances the axial magnetic flux, can couple and regulate the magnetic flux generated between the stator and the rotor, and generate torque to improve the motor performance; it can also be achieved by changing the current size and phase in the flux torque regulating winding 2 to improve the performance and efficiency of the hybrid excitation motor.

[0045] The flux torque regulating winding 2 inside the end cover provides a flexible means for regulating the magnetic field of the motor. It can accurately adjust the output characteristics of the motor according to actual needs, can adapt to different load changes and working environments, has stronger adaptability and flexibility, and meets the requirements of various complex application scenarios.

[0046] The present invention greatly improves the torque output capacity of the motor by effectively guiding and utilizing the stator and rotor leakage magnetic field. Compared with the traditional motor structure, it can achieve higher efficiency and greater output power under the same volume and input power.

[0047] In practical applications, the motor of the present invention can be applied to various fields according to different needs. For example, in industrial production, it can be used to drive mechanical equipment; in the field of transportation, it can be used as a power source for electric vehicles; in the field of new energy, it can be combined with wind power generation, solar power generation and other systems to improve energy utilization efficiency.

[0048] The above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art should understand that the present invention can still be modified or replaced by equivalents. Any modification or partial replacement that does not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

[0049] If the words "first", "second", etc. are used in this document to limit components, those skilled in the art should know that the use of "first" and "second" is only to facilitate the description of the present invention and simplify the description. Unless otherwise stated, the above words have no special meaning.

[0050] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0051] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A ring-shaped winding hybrid excitation motor structure that utilizes stator-rotor leakage magnetic flux to increase torque, comprising a motor end cover, a rotor, permanent magnets distributed on the rotor, a stator core, and a stator ring-shaped winding, characterized in that: It also includes a leakage flux bridge, an arched flux bridge and a flux torque regulating winding; An arched flux bridge is installed on each phase of the stator annular winding, the arched flux bridge half-wraps the stator annular winding in each phase, and both ends of the arched flux bridge are fixedly connected to the stator core; The rotor end forms a rotor pole region between two permanent magnets, and the number of leakage flux bridges corresponds to the rotor pole region; the leakage flux bridge extends from the surface of the rotor pole region to the arched flux bridge on the end of the stator annular winding; the surface of the rotor pole region is provided with an arc-shaped adjustment groove concentric therewith, the tail of the leakage flux bridge is slidably installed in the adjustment groove through a convex tooth, and the bridge head of the leakage flux bridge is gap-matched with the arched flux bridge; One end of the arc of the convex tooth is set as an inclined surface, and a number of round balls are arranged in the adjustment groove on the inclined surface side. A spring is connected to the other end of the arc of the convex tooth, and the other end of the spring is connected to the end of the adjustment groove to form a leakage magnetic bridge position adjustment and fixing mechanism; When the rotor is in its original static state, the leakage magnetic induction bridge is on one side of the ball, and the spring is in its original state. At this time, the convex teeth of the leakage magnetic induction bridge are not subjected to force; when the rotor accelerates in the clockwise direction, the leakage magnetic induction bridge will move along the ball direction due to the need to maintain its original static state. At this time, the spring stretches. When the motor speed stabilizes, the spring wants to maintain its original state and will generate a contraction force to pull the leakage magnetic induction bridge back to its original static position; when the position of the leakage magnetic induction bridge needs to be adjusted, the rotor speed is reduced, and the leakage magnetic induction bridge maintains its original state due to inertia When the rotor speed is stable, the spring is in a compressed state. The ball squeezes the convex teeth of the leakage magnetic induction bridge and compresses the inclined surface of the convex teeth. When the rotor speed is stable, the spring is in a compressed state. The ball squeezes the inclined surface of the convex teeth to increase the support force of the adjusting slot wall on the convex teeth. The centrifugal force on the leakage magnetic induction bridge also increases the support force of the adjusting slot on the convex teeth. The superposition of the two supporting forces will increase the friction between the adjusting teeth and the adjusting slot wall. At this time, the friction force is greater than the elastic force of the spring, so that the leakage magnetic induction bridge is fixed inside the adjusting slot, thereby realizing the automatic adjustment of the position of the leakage magnetic induction bridge. A flux torque regulating winding is provided inside the motor end cover; the outer diameter of the motor end cover is consistent with the outermost circle of the leakage flux bridge, the inside of the motor end cover is slotted opposite to the stator annular winding part and the flux torque regulating winding is arranged, and single-phase alternating current is passed to realize flux torque regulation.

2. The ring-shaped winding hybrid excitation motor structure for increasing torque by using stator and rotor leakage flux according to claim 1 is characterized in that: The cross section of the convex tooth is an inverted "T" shape.

3. The annular winding hybrid excitation motor structure for increasing torque by utilizing stator and rotor leakage flux according to claim 1 is characterized in that: The bridge head of the leakage flux bridge is provided with an arched groove, and the arched groove is clamped outside the arched flux bridge.

4. The annular winding hybrid excitation motor structure for increasing torque by using stator and rotor leakage flux according to any one of claims 1 to 3, characterized in that: Each rotor pole region is provided with more than two adjustment slots, and the adjustment slots are arranged at intervals in the radial direction.

5. The ring-shaped winding hybrid excitation motor structure for increasing torque by using stator and rotor leakage flux according to claim 1 is characterized in that: The magnetic flux leakage bridge is made of cast iron material.

6. The annular winding hybrid excitation motor structure for increasing torque by using stator and rotor leakage flux according to claim 1 is characterized in that: The arched magnetic flux bridge is made of cast iron material.

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