High-power density motor with multidirectional magnetic field

Abstract

The invention provides a high-power density motor with a multifunctional magnetic field, which comprises a stator, a middle rotor, a left rotor, a right rotor, a left bearing, a right bearing and a hollow shaft, wherein the stator is fixed on the hollow shaft; the left and right rotors are positioned on the left and right sides of the stator respectively and connected with the hollow shaft through the left bearing and the right bearing respectively; the middle rotor is positioned between the left and right rotors and fixedly connected with the left and right rotors respectively; and the hollow shaft is fixed with other outside devices. The high-power density motor is an outer rotor permanent motor characterized in axial, radial and transverse magnetic field motors. The structure of the traditional motor and the placement mode of armature winding are improved and the end part of the winding can also be participated in the electromechanical energy conservation of the motor, so that the power density and the overall performance of the motor are improved.

Description

technical field [0001] The invention relates to a motor. , especially relates to an outer rotor permanent magnet motor that simultaneously has the characteristics of an axial, radial and transverse field motor. Background technique [0002] The armature winding of an electric motor consists of a plurality of conductor edges placed in the core slots and winding ends for connecting these conductor edges. During the working process of the motor, the edge of the conductor located in the core slot cuts the main magnetic field of the air gap to generate an induced electromotive force and realize electromechanical energy conversion. The end of the winding is located outside the main magnetic field of the air gap, not only does not participate in the electromechanical energy conversion of the motor, but also has the following adverse effects on the performance of the motor: [0003] (1) The magnetic field formed when the armature current flows through the end of the winding belong...

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Problems solved by technology

[0003] (1) The magnetic field formed when the armature current flows through the end of the winding belongs to the leakage magnetic field. The existence of the leakage magnetic field will cause the waveform distortion of the main magnetic field of the air gap and increase the saturation degree of the core;

[0004] (2) The end of the winding is located outside the core slot, which is easy to be damaged by bumping when the motor is disassembled, and inter-turn short circuit or open circuit fault occurs, and in some transient processes of the motor, the excessive armature current impact will cause broken ends;

[0005] (3) Although the end of the winding does not participate in electromechanical energy conversion, it also needs to consume a certain amount of copper wire and generate corresponding copper loss, which will increase the cost, volume and weight of the motor and reduce the operating efficiency

[0008] (2) In these motors, the stator windings are not fully utilized, and there are still end structures with traditional windings

[0009] (3) There are no left and right end rotor structures similar to the present invention, stator annular groove structure, specific structures such as stator and rotor magnetic isolation measures

[0010] (4) Does not have and cannot realize the structure and function of eliminating the cogging moment proposed by the present invention

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