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CN-115811194-B - Self-rotation high-power-weight-ratio outer rotor electric propulsion vernier motor

CN115811194BCN 115811194 BCN115811194 BCN 115811194BCN-115811194-B

Abstract

The invention discloses a self-steering high-power-weight-ratio outer rotor electric propulsion vernier motor, and relates to the technical field of permanent magnet synchronous motors and integrated design of motors and steering gears. The rotor comprises an outer rotor, wherein an inner stator assembly is movably connected to the inner part of the outer rotor, the inner stator assembly is axially divided into a multi-section structure, armature windings are arranged on each section of inner stator assembly, a permanent magnet assembly is arranged in the outer rotor and between the outer rotor and the inner stator, the permanent magnet assembly is axially divided into a multi-section structure, and a shell is fixedly connected with an outer rotor yoke part and provided with propeller blades on the outer surface. The invention solves the problems of the prior art that a single rotating motor needs an external steering device, has low power-weight ratio and heavy whole body, and the outer rotor can simultaneously perform autorotation and deflection movement, thereby reducing steering transposition and whole volume weight, reducing mechanical loss and increasing torque density.

Inventors

  • FAN YING
  • CHEN QIUSHUO
  • QIN YUYUAN
  • CHEN JUNLEI

Assignees

  • 东南大学

Dates

Publication Date
20260508
Application Date
20221227

Claims (8)

  1. 1. The utility model provides a self-steering high power-to-weight ratio external rotor electricity impels vernier motor which characterized in that includes: the motor comprises an outer rotor (1), wherein an inner stator assembly (2) is movably connected inside the outer rotor (1), the inner stator assembly (2) is axially divided into a plurality of sections, and an armature winding (4) is arranged on each section of the inner stator assembly (2); The permanent magnet assembly (3) is arranged in the outer rotor (1), is positioned between the outer rotor (1) and the inner stator, and the permanent magnet assembly (3) is axially divided into a plurality of sections; A shell fixedly connected with the yoke part of the outer rotor (1), a propeller blade (7) is arranged on the outer surface of the shell, The stator assembly (2) is axially divided into a three-section structure and comprises a first stator (2-1), a second stator (2-2) and a third stator (2-3), wherein the first stator (2-1) and the third stator (2-3) are axially distributed, the second stator (2-2) is radially distributed, and stator grooves and stator teeth are formed in the first stator (2-1), the second stator (2-2) and the third stator (2-3); The stator teeth and the stator grooves of the first stator (2-1) and the third stator (2-3) are in axial directions and staggered by 180 degrees in potential angle, the stator teeth and the stator grooves of the second stator (2-2) are in radial directions, and the stator teeth and the stator grooves of the first stator (2-1) and the third stator (2-3) are staggered by 90 degrees in potential angle with the stator tooth central lines, namely the armature winding (4) is staggered by 180 degrees.
  2. 2. The self-steering high-duty ratio outer rotor electric propulsion vernier motor of claim 1 is characterized in that an armature winding (4) adopted by the second stator (2-2) is a radial armature winding (4-1), particularly a double three-phase winding, alternating current is supplied, the armature windings (4) adopted on the first stator (2-1) and the third stator (2-3) are axial armature windings (4-2), particularly six groups of single-phase windings, direct current is supplied, and the armature windings (4) are not mutually interfered.
  3. 3. The self-steering high-power-weight-ratio outer rotor electric propulsion vernier motor of claim 2, wherein the permanent magnet assembly (3) is divided into a three-section structure along the axial direction and comprises a first permanent magnet (3-1), a second permanent magnet (3-2) and a third permanent magnet (3-3), the first permanent magnet (3-1), the second permanent magnet (3-2) and the third permanent magnet (3-3) are of N-S type alternate tangential magnetizing structures, the first permanent magnet (3-1), the second permanent magnet (3-2) and the third permanent magnet (3-3) are all sector ring bodies with wide upper parts and narrow lower parts, and a magnetism isolating block (5) is arranged among the first permanent magnet (3-1), the second permanent magnet (3-2) and the third permanent magnet (3-3).
  4. 4. The self-steering high-power-weight-ratio outer rotor electric propulsion vernier motor as claimed in claim 3, wherein the pole pair number of the second permanent magnet (3-2) is unequal to the pole pair number of the armature winding (4) of the second stator (2-2), and the pole pair numbers of the first permanent magnet (3-1) and the third permanent magnet (3-3) are respectively equal to the pole pair numbers of the first stator (2-1) and the third stator (2-3).
  5. 5. The self-steering high-power-weight-ratio outer rotor electric propulsion vernier motor of claim 1, wherein the stator assembly (2) is divided into a three-section structure along the axial direction and comprises a first stator (2-1), a second stator (2-2) and a third stator (2-3), the first stator (2-1), the second stator (2-2) and the third stator (2-3) are all distributed along the radial direction, an armature winding (4) adopted by the first stator (2-1) and the third stator (2-3) is of an annular structure, and an electric potential angle of 180 degrees is staggered between the first stator (2-1) and the third stator (2-3), namely the armature winding (4) is staggered by 180 degrees.
  6. 6. The self-steering high-power-weight-ratio outer rotor electric propulsion vernier motor of claim 5, wherein the permanent magnet assembly (3) is divided into a three-section structure along the axial direction and comprises a first permanent magnet (3-1), a second permanent magnet (3-2) and a third permanent magnet (3-3), the first permanent magnet (3-1) and the third permanent magnet (3-3) are of an N-S type alternate surface-mounted radial magnetizing structure, and the second permanent magnet (3-2) is of an N-S type alternate tangential magnetizing structure.
  7. 7. The self-steering high-power-weight-ratio outer rotor (1) electric propulsion vernier motor disclosed in claim 6 is characterized in that a connecting bridge (8) is arranged at the yoke part of the outer rotor (1) outside the second permanent magnet (3-2), and a magnetism isolating block (5) is arranged at the bottom of the second permanent magnet (3-2).
  8. 8. The self-steering high-power-weight-ratio outer rotor electric propulsion vernier motor of claim 1, wherein the stator assembly (2) is divided into two sections along the axial direction and comprises a first stator (2-1) and a second stator (2-2), the first stator (2-1) is arranged along the axial direction, the second stator (2-2) is arranged along the radial direction, spherical crown type permanent magnets (3-4) are arranged on the inner side of the outer rotor (1) corresponding to the first stator (2-1), and the spherical crown type permanent magnets (3-4) are in surface-mounted radial magnetization.

Description

Self-rotation high-power-weight-ratio outer rotor electric propulsion vernier motor Technical Field The invention relates to the technical field of permanent magnet synchronous motors and integrated design of motors and diverters, in particular to a self-diverting high-power-weight-ratio outer rotor electric propulsion vernier motor. Background The permanent magnet vernier motor is designed based on a magnetic field modulation method, and is equivalent to a common permanent magnet motor and a mechanical speed reducer from the aspect of external characteristics because of unequal pole pair numbers of the stator and the rotor, so that the self-speed reduction and torque increase can be realized in a limited space, and the permanent magnet vernier motor can be widely applied to an electric propulsion system. However, in the conventional electric propulsion system, the steering movement cannot be performed by the separate rotating motor, and an additional steering device is required to be installed, especially for the electric aircraft, the device of the lightweight propulsion system is required, which causes waste of space resources and increases the overall weight. The traditional multi-degree-of-freedom motor can realize autorotation and deflection movement, but has larger structural limitation and lower torque, so that the requirement of high power-to-weight ratio is hardly met, and the two movements adopt a single set of armature windings to act on the permanent magnets of the same part, so that the control and positioning are difficult, and the existing requirement is hardly met in performance. Therefore, in order to meet the requirements of the electric propulsion system, the reduction of the volume weight and the improvement of the power-to-weight ratio are key problems to be solved urgently. Disclosure of Invention The invention aims to provide a self-steering high-power-weight-ratio outer rotor electric propulsion vernier motor, which aims to reduce the volume weight of the existing motor, improve the power-weight ratio and meet the requirements of an electric propulsion system. The technical scheme is that the self-steering high-power-weight-ratio outer rotor electric propulsion vernier motor comprises an outer rotor, an inner stator assembly, a permanent magnet assembly, a shell and a propeller blade, wherein the inner stator assembly is movably connected with the inside of the outer rotor, the inner stator assembly is axially divided into a multi-section structure, each section of inner stator assembly is provided with an armature winding, the permanent magnet assembly is arranged inside the outer rotor and is positioned between the outer rotor and the inner stator, the permanent magnet assembly is axially divided into a multi-section structure, the shell is fixedly connected with an outer rotor yoke, and the outer surface of the shell is provided with the propeller blade. Further, the stator assembly is divided into a three-section structure along the axial direction and comprises a first stator, a second stator and a third stator, wherein the first stator and the third stator are all arranged along the axial direction, the second stator is arranged along the radial direction, and stator grooves and stator teeth are formed in the first stator, the second stator and the third stator. Further, the stator teeth and the stator slots of the first stator and the third stator are both in the axial direction and staggered by 180 degrees in potential angle, the stator teeth and the stator slots of the second stator are both in the radial direction, and the stator teeth and the stator slots of the second stator are staggered by 90 degrees in potential angle with the middle lines of the stator teeth of the first stator and the stator teeth of the third stator, namely the armature windings are staggered by 180 degrees in potential angle. Furthermore, the armature windings adopted by the second stator are double three-phase windings and are electrified with alternating current, the armature windings adopted by the first stator and the third stator are six groups of single-phase windings, the direct current is electrified, and the armature windings are not mutually interfered. Further, the permanent magnet assembly is axially divided into a three-section structure and comprises a first permanent magnet, a second permanent magnet and a third permanent magnet, wherein the first permanent magnet, the second permanent magnet and the third permanent magnet are of N-S type alternate tangential magnetizing structures and are fan-shaped ring bodies with wide upper parts and narrow lower parts, and magnetism isolating blocks are arranged among the first permanent magnet, the second permanent magnet and the third permanent magnet. Further, the pole pair number of the second permanent magnet is unequal to the pole pair number of the armature winding of the second stator, and the first permanent magnet and the third perman