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Novel permanent magnetic structure outer rotor disc type motor

An outer rotor disc and permanent magnet technology, applied in the field of motors and disc motor rotors, can solve the problems of waste of materials, failure to use main magnetic poles and auxiliary magnetic poles, etc., to weaken harmonic content, improve air gap magnetic field waveform, and improve motor performance. efficiency effect

Active Publication Date: 2014-07-02
DAQING HAOWEI PETROLEUM TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the existing permanent disk type ironless coreless synchronous motor rotor adopts an equal-thickness permanent magnet array, which wastes materials to a certain extent and cannot utilize the relationship between the main magnetic pole and the auxiliary magnetic pole, so that the air-gap flux density waveform tends to Due to the sinusoidal problem, the present invention provides a new type of permanent magnet structure outer rotor disc motor

Method used

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  • Novel permanent magnetic structure outer rotor disc type motor
  • Novel permanent magnetic structure outer rotor disc type motor
  • Novel permanent magnetic structure outer rotor disc type motor

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specific Embodiment approach 1

[0019] Specific implementation mode one: see figure 1 , 2 and 3 illustrate this embodiment, a new type of permanent magnet structure outer rotor disc motor described in this embodiment, it includes a pair of motor rotors, the motor rotor is a ring structure, and is composed of N permanent magnets The head and tail are fixedly connected, and the said N is a positive integer; a pair of motor rotors are mirror-symmetrically arranged with the wedge-shaped winding disk as the center, and the air gap side of each motor rotor is a planar structure;

[0020] Each permanent magnet group is composed of 8 permanent magnets arranged in sequence, and the 8 permanent magnets are respectively No. 1 permanent magnet 1, No. 2 permanent magnet 2, No. 3 permanent magnet 3, No. 4 permanent magnet 4, No. 5 permanent magnet 5, No. 6 permanent magnet 6, No. 7 permanent magnet 7, No. 8 permanent magnet 8, the axial cross-sections of the 8 permanent magnets are fan-shaped;

[0021] The structures of...

specific Embodiment approach 2

[0028] Embodiment 2: The difference between this embodiment and the new type of permanent magnet structure external rotor disc motor described in Embodiment 1 is that α1=α2+2.1, α3=α2+1.05, h1=h2+ 2.

specific Embodiment approach 3

[0029] Embodiment 3: The difference between this embodiment and the new type of permanent magnet structure outer rotor disk motor described in Embodiment 2 is that N is 8.

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Abstract

The invention provides a novel permanent magnetic structure outer rotor disc type motor, and relates to the field of motors, in particular to the field of disc type motor rotors. The problems that an existing permanent magnet disc type iron coreless synchronous motor rotor adopts a uniform-thickness permanent magnet array, to some extent, materials are wasted, the matching relation between a main magnetic pole and an auxiliary magnetic pole can not be utilized, and magnetic flux density waveforms of air gaps tend to be a sine curve are solved. The novel permanent magnetic structure outer rotor disc type motor comprises a pair of motor rotors which are of an annular structure. The motor rotors are formed by fixedly connecting N permanent magnet sets end to end, the pair of motor rotors is arranged in a mirror-symmetry mode with a wedged winding disc as the center, and the air gap side of each motor rotor is of a planar structure. Each permanent magnet set is formed by arraying 8 permanent magnets in sequence, the 8 permanent magnets are the first permanent magnet, the second permanent magnet, the third permanent magnet, the fourth permanent magnet, the fifth permanent magnet, the sixth permanent magnet, the seventh permanent magnet and the eighth permanent magnet, and the axial cross sections of the 8 permanent magnets are all in a fan shape. The axial sections of the first permanent magnets and the fifth permanent magnets are rectangular, the axial sections of the permanent magnets in even numbers are trapezoid, and the axial sections of the third permanent magnets and the seventh permanent magnets are rectangular.

Description

technical field [0001] The invention relates to the field of motors, in particular to the field of disc motor rotors. Background technique [0002] At present, the rare earth permanent magnet motor is a new type of motor under development. Different from the radial structure of the traditional cylindrical motor, the disc permanent magnet motor is an axial flux motor. It has simple structure, reliable operation, small size and high quality. Light, low loss, high efficiency. Its most notable advantage is that the motor is excited by permanent magnets, the rotor has no loss, and the motor has high operating efficiency. Due to the equal arrangement of the stator and rotor, the stator winding has good heat dissipation conditions and can obtain high power density. In addition, this kind of motor rotor has small moment of inertia, small electromechanical time constant, high peak torque and stall torque, large torque / weight ratio, stable low-speed operation, and excellent dynamic p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K21/24H02K1/27
Inventor 谢颖曲春梅杨忠学吕森
Owner DAQING HAOWEI PETROLEUM TECH DEV