Magnetic isolation outer rotor structure of a stator permanent magnet double rotor motor

Abstract

The invention discloses a magnetic-isolation outer rotor structure of a stator permanent magnet double-rotor motor. A barrel-shaped inner body is arranged at the innermost side, the inner body is sleeved with an annular magnetic-isolation part coaxially and fixedly, the magnetic-isolation part is sleeved with a barrel-shaped outer body coaxially and fixedly, the magnetic-isolation part extends outwards axially from the output end of the outer body and the output end of the inner body, and the extending part serves as the end surface of torque output. Outer protruding poles evenly distributed circumferentially are arranged on an outer ring of the outer body, inner protruding poles evenly distributed circumferentially are arranged on an inner ring of the inner body, the number of the outer protruding poles is the same as that of the inner protruding poles, and the outer protruding poles and the inner protruding poles are arranged in opposite in the radial direction. A plurality of axial outer round grooves are formed in the outer body, one outer metal strip is fixedly embedded in each outer round groove, a plurality of axial inner round grooves are formed in the inner body, and one inner metal strip is fixedly embedded in each inner round groove. The inner metal strips, the outer metal strips and the magnetic-isolation part are all made of non-magnetic-conduction materials, loss and consumption of a rotor are reduced, a magnetic isolation function is achieved between the magnetic-isolation part and the output end surface, coupling of an inner motor field and an outer inner motor field is eliminated, and an inner motor and an outer motor can be controlled independently.

Description

technical field [0001] The invention relates to a double-rotor motor, in particular to an outer rotor structure of the double-rotor motor, and belongs to the field of motor design. Background technique [0002] The structural feature of the double-rotor motor is that it has a stator and two inner and outer rotors. There are permanent magnets on the outer rotor of most dual-rotor motors. In addition to the problems of difficult fixing and heat dissipation, there is also the problem that the inner and outer magnetic fields are easy to affect each other. In order to overcome these problems, a stator permanent magnet dual-rotor motor has been proposed in recent years. The outer rotor of the stator permanent magnet dual-rotor motor has no permanent magnets and no windings. It is a double salient pole structure, but it still does not solve the problem of magnetic field coupling between the inner and outer motors. Therefore, the ability to decouple the magnetic field of the inner ...

AI Technical Summary

Problems solved by technology

Most of the dual-rotor motors have permanent magnets on the outer rotor. In addition to the problems of difficult fixation and heat dissipation, there is also the problem that the internal and external magnetic fields are easily affected by each other.

In order to overcome these problems, a stator permanent magnet dual-rotor motor has been proposed in recent years. The outer rotor of the stator permanent magnet dual-rotor motor has no permanent magnets and no windings. It is a double salient pole structure, but it still does not solve the problem of magnetic field coupling between the inner and outer motors. Therefore, the ability to decouple the magnetic fields of the internal and external motors is the key to whether the internal and external motors can be independently and accurately controlled.

[0003] The rotor shaft of the output torque of the traditional motor is connected with the laminated rotor of the motor through the rotor bracket. The output of the torque of the outer rotor depends on the end face of the outer rotor, and since there is no space to install the rotor bracket and the shaft, the laminations cannot be fixed and compressed, so the outer rotor is mostly made of solid steel, resulting in a large loss

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