Double-stator consequent-pole brushless hybrid excitation motor

Abstract

The invention relates to the field of permanent magnet motor design, in particular to a double-stator consequent-pole brushless hybrid excitation motor. The motor comprises an inner stator, an outer stator and a rotor, wherein an armature winding is placed on the outer stator, an alternating-current excitation winding is placed on the inner stator, and the rotor is placed in the inner stator and the outer stator. The inner stator adopts an alternating-current excitation winding and is separated from an armature winding, brushless hybrid excitation is realized, coupling between the windings isreduced, an armature and a slip ring are omitted, and the reliability and the utilization rate of the motor are improved. Fractional slot concentrated windings are adopted as armature windings, and fractional slot distributed windings are adopted as alternating-current excitation windings. The inner stator and the outer stator have the same number of slots, the inner stator tooth (slot) center line and the outer stator slot (tooth) center line have the same weight, magnetic flux leakage is reduced, and control is easy. The rotor adopts a mode that the U-shaped permanent magnet poles and the iron core poles are alternately arranged, one iron core pole is arranged in the adjacent U-shaped permanent magnet poles with the same polarity, the iron core poles provide an alternating current excitation path, the permanent magnet consumption can be reduced, and the production cost is saved.

Description

technical field [0001] The invention relates to the design field of permanent magnet motors, in particular to a dual-stator alternate pole brushless hybrid excitation motor. Background technique [0002] Permanent magnet motors are widely used in electric vehicles, CNC machine tools and other fields due to their advantages of high efficiency and high power density. The traditional permanent magnet synchronous motor has only a single permanent magnet excitation source, which has problems such as easy demagnetization of the permanent magnet and difficulty in adjusting the magnetic field, which limits its use. Two methods are usually used to solve the problem of difficult adjustment of the magnetic field of permanent magnet motors. One is to increase the capacity of the system inverter and increase the limit voltage of the motor to improve the ability of field weakening and speed expansion. However, it is necessary to expand the capacity of power electronic devices and increase...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the deficiencies mentioned in the above-mentioned background technology, the purpose of the present invention is to provide a double-stator alternating-pole brushless hybrid excitation motor, which solves the problems that the traditional rotor permanent magnet motor cannot realize wide speed regulation range and high cost

The permanent magnet is designed as a U-shaped structure, and alternate poles and AC excitation windings are used to solve the problems of high cost and difficult excitation adjustment of rotor permanent magnet motors

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