Double-magnetic-field modulation type magnetic gear composite motor

Abstract

The invention discloses a double-magnetic-field modulation type magnetic gear composite motor which comprises a transmission shaft, a fixed end cover, a permanent magnet rotor, a motor stator, an auxiliary magnetic modulation ring and a fixed shaft which are coaxially arranged. The fixed shaft is connected with the fixed end cover, the fixed end cover and a pole shoe of the permanent magnet rotor are provided with intercommunicated screw holes, and the fixed end cover and the pole shoe are fixed through bolts and nuts. The motor stator comprises a stator punching sheet and a magnetism adjusting block, the motor stator is formed by stacking laminated silicon steel sheets, and the stator punching sheet and the magnetism adjusting block are integrated. A layer of main air gap is arranged between the permanent magnet rotor and the motor stator, and the auxiliary magnetism adjusting ring is fixed in the permanent magnet rotor through a fixing shaft. A layer of auxiliary air gap is arranged between the auxiliary magnetism adjusting ring and the permanent magnet rotor, and a permanent magnet in the permanent magnet rotor is of an embedded spoke type structure. According to the present invention, the structure of an embedded spoke type permanent magnet magnetic circuit can be improved, and the torque performance of the embedded spoke type permanent magnet magnetic circuit on an application object is enhanced.

Description

technical field

[0001] The invention relates to the technical field of motors, in particular to a double magnetic field modulation magnetic gear composite motor. Background technique

[0002] For the traditional multi-air-gap magnetic gear compound motor, the magnetic field formed by its windings needs to pass through multiple air gaps before it can be coupled with the magnetic field of the permanent magnet of the rotor, which makes the air-gap magnetic pressure drop too high and leads to a decrease in overall efficiency. And due to the structural characteristics of multiple air gaps, the existing magnetic gear compound motor is still relatively complicated in structure, so it is necessary to further optimize the structure of the magnetic gear inside the compound motor, simplify its mechanical structure, reduce its manufacturing cost and improve its operation. process reliability. An overly complex mechanical and magnetic circuit structure will inevitably increase the loss ...

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