Birotor permanent magnet synchronous reluctance motor and configuration method

Abstract

The invention discloses a birotor permanent magnet synchronous reluctance motor and a configuration method. A rotating shaft, a reluctance rotor, a stator and a permanent magnet rotor are sequentiallyarranged from inside to outside, wherein stator grooves are uniformly formed inside and outside the stator, the stator is arranged between the permanent magnet rotor and the reluctance rotor, a d axis is defined as a center line of ferrite of the permanent magnet rotor, a q axis is defined as a center line of a salient pole of the reluctance rotor, a mounting angle of the two rotors on the rotating shaft is defined as an included angle between the d axis and the q axis, a superposition mechanism of torque components is changed by adjusting the mounting angle between the permanent magnet rotorand the reluctance rotor, so the permanent magnet torque and the reluctance torque reach the maximum values at the same current phase angle. The motor is advantaged in that on the premise of not increasing mechanical manufacturing and cooling difficulty of the motor, the electromagnetic torque, the power density and the efficiency are comprehensively improved, the torque pulsation and other electromagnetic properties are inhibited, and the rotor is flexible in structural design, simple in machining process and high in mechanical strength.

Description

technical field [0001] The invention belongs to the field of motor equipment, in particular to a dual-rotor permanent magnet synchronous reluctance motor and a configuration method. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] Permanent magnet motors are widely used in various fields due to their high torque density and high efficiency. However, the high price and limited supply of rare earth permanent magnet materials have brought great challenges to the development of permanent magnet motors. Therefore, it is imperative to study high-performance motors with fewer or zero rare-earth permanent magnets. [0004] The synchronous reluctance motor is considered as one of the alternatives due to the fact that it does not use permanent magnets, has a strong rotor structure and low cost, but it reduces the torque density, efficiency and pow...

AI Technical Summary

Problems solved by technology

However, these motors are not only complex in structure, but also have weak air gap flux density and high harmonics, resulting in low permanent magnet torque and high torque ripple

In addition, the inserted permanent magnets will worsen the stress condition of the ribs of the magnetic isolation bridge and limit the magnetic isolation bridge design with a relatively low significant ratio

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