Five-phase permanent magnet motor based on combined Halbach permanent magnet arrays

Abstract

The invention discloses a five-phase permanent magnet motor based on ombined Halbach permanent magnet arrays. The motor comprises a stator core, a rotor core, a rotating shaft, a five-phase winding and a plurality of combined Halbach permanent magnet arrays, wherein the five-phase winding is placed in a slot of the stator core; each combined Halbach permanent magnet array is respectively used as an N pole magnetic pole or an S pole magnetic pole; each combined Halbach permanent magnet array is sequentially pasted on the surface of the rotor core; and each combined Halbach permanent magnet array is composed of two conventional segmented Halbach permanent magnet arrays. The invention can solve the problem that as for existing Halbach array permanent magnet rotors, it is hard to increase thetorque of a motor by injecting third harmonic currents.

Description

Technical field [0001] The invention belongs to the technical field of permanent magnet motors, and particularly relates to a five-phase permanent magnet motor based on a combined Halbach permanent magnet array. Background technique [0002] The five-phase permanent magnet motor has the characteristics of high torque density, high efficiency, low torque ripple, low requirements for power device capacity and strong fault tolerance. With the rapid development of advanced electromagnetic design theory, digital control technology and power electronic technology The development has made it widely used in occasions that require high motor power density and fault tolerance, especially in military industrial fields such as aviation, aerospace, navigation, and electric vehicles. [0003] Halbach permanent magnet array structure is a new type of structure that has appeared in recent years to reduce torque ripple and iron loss. It is widely used in five-phase motors. However, the nearly sinus...

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Problems solved by technology

[0003] The Halbach permanent magnet array structure is a new structure that has appeared in recent years to reduce torque ripple and iron loss. It is widely used in five-phase motors. However, the nearly sinusoidal air gap flux density of the Halbach permanent magnet array rotor makes the motor winding The generated third harmonic back EMF is relatively small, resulting in a limited boost to the motor torque by injecting the third harmonic current

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