A Rotor Staggered Pole Modular External Rotor Switched Flux Motor

Abstract

The invention discloses a rotor pole-staggering modularized outer rotor switch flux machine. The machine comprises two stators, two rotors and a set of winding, wherein the two stators are concentrically connected in the axial direction, the two rotors are staggered a mechanical angle corresponding to a half cycle of counter electromotive force, the winding comprises k winding modules, each winding module comprises m winding units, each winding unit comprises two winding coils, the two winding coils of each winding units are respectively embedded into four stator slots in a pair of stator units corresponding to the two stators, and polarities of a pair of permanent magnets, in the same winding coil, on the two stators are opposite. According to the machine, the two rotors are mutually staggered the mechanical angle corresponding to a half cycle of the counter electromotive force, the polarities of the permanent magnets, opposite to each other, on the two stators are opposite, under the condition that ensuring the effective values of an average output torque and the counter electromotive force are ensured to be constant, a cogging torque and an odd harmonic in torque ripple are reduced, and an even harmonic in the counter electromotive force is reduced.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a rotor-staggered pole modularized outer rotor switched flux motor. Background technique [0002] Switched flux motors have the advantages of high torque density, high power density, and sinusoidal back EMF. It has a doubly salient pole structure, with AC windings and permanent magnets placed on the stator side, combining the advantages of AC brushless motors and switched reluctance motors, which is good for cooling and high-speed operation. Compared with ordinary permanent magnet motors, switched flux motors have strong magnetic field weakening capability, stable operating point, and good fault tolerance performance, so switched flux motors are suitable as drive motors for electric vehicles. Since the permanent magnet is placed on the stator side, the slot area of ​​the switched flux motor is smaller than that of the ordinary permanent magnet motor; compared with the double sali...

AI Technical Summary

Problems solved by technology

Since the permanent magnet is placed on the stator side, the slot area of ​​the switched flux motor is smaller than that of the ordinary permanent magnet motor; compared with the double salient pole motor, its torque fluctuation is larger, the amount of permanent magnets is more, and the utilization rate of permanent magnets is lower

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