Magnetic gear composite motor

Abstract

The invention discloses a magnetic gear composite motor. The magnetic gear composite motor comprises an outer stator, a modulation rotor and an inner rotor which are sequentially arranged in a concentrically nested manner from outside to inside, wherein air gaps are formed between the outer stator and the modulation rotor as well as between the modulation rotor and the inner rotor respectively; the outer stator is provided with a trapezoidal groove used for placing a fractional slot winding, and the groove opening is embedded with alternative-pole magnetic steel; the modulation rotor comprisesa plurality of magnet regulating yokes and a plurality of non-magnetic conductive materials embedded with punched holes respectively, and the adjacent magnet regulating yokes are embedded with the punched non-magnetic conductive materials therebetween; and the permanent magnet inner rotor comprises inner rotor permanent magnets and an inner rotor iron core which are concentrically nested to one another sequentially from outside to inside. According to the magnetic gear composite motor provided by the invention, a magnetic path of the magnetic gear motor on the stator is constructed through combining permanent magnets with different polarization directions, so that the magnetic path is enabled to be more efficient and reasonable, the flux leakage is reduced while low-speed and high-torquedirect drive output is realized, and the overall torque density and efficiency of the composite motor are improved.

Description

technical field [0001] The invention belongs to the field of low-speed high-torque direct drive motors, and more specifically relates to a magnetic gear compound motor. Background technique [0002] The magnetic gear compound motor is a new type of motor that has gradually emerged with the magnetic field modulation magnetic gear. It is a technology that combines the magnetic field modulation magnetic gear with the permanent magnet motor to achieve low-speed high-torque output. According to the number of air gaps and the degree of coupling of the composite motor, different forms are derived, including a three-layer air-gap magnetic gear composite motor with separate motor and gear magnetic circuits, a collimated drive magnetic gear composite motor with a closed slot stator embedded with magnetic steel, etc. Wait. Most of these solutions have some limitations: large amount of magnetic steel, complex structure, low torque density of magnetic gear part or permanent magnet motor...

AI Technical Summary

Problems solved by technology

[0003] In view of the above defects or improvement needs of the prior art, the present invention provides a magnetic gear compound motor, the purpose of which is to solve the technical problem of low torque density of the existing magnetic gear compound motor. Combination, constructing the magnetic circuit of the magnetic gear structure on the motor stator, thereby simplifying the structure of the stator teeth, achieving a significant increase in the overall torque density of the compound motor and a reduction in loss

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