Magnetic gear type double-stator hybrid permanent magnet memory motor

Abstract

The invention discloses a magnetic gear type double-stator hybrid permanent magnet memory motor. The motor comprises an external stator, a rotor and an internal stator which are coaxially arranged and sleeved from outside to inside in turn. The external stator comprises armature iron core teeth, stator yokes and armature windings which are arranged on the armature iron core teeth. The internal stator comprises an internal stator iron core provided with internal slots, neodymium iron boron permanent magnets, aluminum nickel cobalt permanent magnets and pulse magnetic regulating windings which are arranged in the internal slots of the internal stator. The two types of co-excitation permanent magnets are arranged in a "U" shape. The number of single permanent magnets on the internal stator is equal to that of external stator armature teeth. The whole rotor has an annular cup-shaped structure. Rotor iron blocks are fixed in a non-magnetic-conductive epoxy resin sleeve. The rotor iron blocks are connected via magnetic conductive bridges. Disadvantages that a conventional single stator has multiple internal excitation sources which are mutually hindered in space and torque density is relatively low can be solved. Besides, high power density is realized by arrangement of double-stator hybrid permanent magnets, and residual magnetization intensity and magnetization direction of the permanent magnets are regulated by applying pulse current so that motor magnetic field high-efficiency regulation is realized, and rotating speed operation range is enhanced.

Description

technical field [0001] The invention relates to an adjustable magnetic flux permanent magnet motor, in particular to a magnetic gear type double-stator hybrid permanent magnet memory motor. Background technique [0002] In the field of motors, due to the inherent characteristics of ordinary permanent magnet materials (such as NdFeB), the air gap magnetic field in the motor is basically kept constant, and the speed regulation range is very limited when operating as an electric motor. The application of wide-speed adjustable direct drive applications such as electric vehicles and aerospace is limited to a certain extent. Therefore, the adjustable flux permanent magnet motor aimed at realizing the effective adjustment of the air gap magnetic field of the permanent magnet motor has always been a hot spot and difficulty in the field of motor research. . Traditional PMSMs use direct-axis current for field-weakening speed regulation, but it is difficult to achieve high-efficiency ...

AI Technical Summary

Problems solved by technology

[0007] However, the traditional magnetic gear motor rotor core has large hysteresis loss and eddy current loss, and the air gap magnetic field is generated by the excitation of NdFeB permanent magnets, which is difficult to adjust, which limits its application in wind power generation and electric vehicle wide-speed drive applications. application

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