Radial magnetic field stator yoke-free double-rotor disc type permanent magnet synchronous motor

Abstract

The invention discloses a radial magnetic field stator yoke-free double-rotor disc type permanent magnet synchronous motor. The motor comprises a stator, an outer rotor, an inner rotor, a rotor support, a rotating shaft, a front bearing, a rear bearing, a front end cover, a rear end cover and a housing. The stator is composed of a stator iron core and a stator winding. The outer rotor is composedof an outer rotor iron core and outer magnetic steel. The inner rotor is composed of an inner rotor iron core and inner magnetic steel. The rotor support is connected with the outer rotor, the inner rotor and the rotating shaft, the rotating shaft is supported by the front bearing and the rear bearing, the front end cover is connected with the stator iron core and the housing and provided with a bearing chamber and a cooling liquid water channel, the rear end cover is connected with the housing and provided with a bearing chamber, and the outer magnetic steel and the inner magnetic steel are permanent magnets. The radial magnetic field stator yoke-free double-rotor permanent magnet disc type motor has the outstanding advantages of high peak torque density, high efficiency, small size, light weight and disc-type thin appearance, and is particularly suitable for being used as an electric vehicle wheel edge driving motor, a hub motor, an integrated generator and the like.

Description

technical field [0001] The invention relates to the electromechanical field, in particular to a radial magnetic field stator yokeless double rotor disc permanent magnet synchronous motor. Background technique [0002] In the case of wheel-side drive, wheel-hub drive and engine integration of new energy vehicles, flat and thin drive motors are required to make space placement feasible. In the prior art, an axial magnetic field disk type permanent magnet motor or a radial magnetic field outer rotor type permanent magnet motor is often used. Axial magnetic field disc motors have various structures, but they all have the following disadvantages that are difficult to overcome: [0003] First. In the axial field motor, there is a large axial magnetic pulling force between the stator and the rotor. When the motor power is large and the radial dimension is large, the radial extension of the rotor is easily bent by the large axial magnetic pulling force, and This axial force can m...

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Problems solved by technology

[0005] third. The road conditions are different when the car is driving, there will be bumps and vibrations, and the large-diameter axial magnetic field motor has a small air gap between the two disks of the stator and the rotor. There will be a hidden danger that may cause the stator and rotor to rub against each other

[0006] In the prior art, another type uses the radial magnetic field outer rotor permanent magnet motor, which avoids the defects of the axial magnetic field motor, but its own electromagnetic structure is not as good as the peak torque density and efficiency indicators. Unsatisfactory, so it needs to be improved

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