E-shaped stator core flux switching type hybrid permanent magnet memory motor

Abstract

The invention discloses an E-shaped stator core flux switching type hybrid permanent magnet memory motor and belongs to the field of flux-adjustable permanent magnet motors. Both rotor and stator cores of the motor adopt a salient pole structure. A stator of the motor comprises six E-shaped stator cores, V-shaped aluminum-nickel-cobalt permanent magnets, tangential-magnetizing rectangular neodymium iron boron permanent magnets and a whole layer of stator yokes, wherein adjacent neodymium iron boron permanent magnets with opposite polarities are inlaid between the two adjacent E-shaped stator cores, and a three-phase concentrated winding armature winding is wound across a sandwich-shaped unit composed of the core edges of adjacent E-shaped stator units and the neodymium iron boron permanent magnets; a groove between two adjacent V-shaped aluminum-nickel-cobalt permanent magnets is used for placing a concentrated single-phase pulse winding. The E-shaped stator core flux switching type hybrid permanent magnet memory motor greatly alleviates a space conflict between electromagnetic loading in the stator cores and pulse magnet-adjustment capacity, can realize flexible online magnet adjustment and has little loss of excitation, the torque density and the force and energy expression of the motor can be improved, and the fault-tolerant fault operation ability is good.

Description

Technical field [0001] The invention relates to an E-shaped stator core magnetic flux switching type hybrid permanent magnet memory motor, belonging to the field of adjustable magnetic flux permanent magnet motors. Background technique [0002] In the field of motors, ordinary permanent magnet synchronous motors (PMSM) due to the inherent characteristics of ordinary permanent magnet materials (such as neodymium iron boron), the air gap magnetic field in the motor remains basically constant, and the speed regulation range is very limited during electric operation. Electric vehicles, aerospace and other wide-speed direct-drive applications are subject to certain restrictions. Therefore, the adjustable flux permanent magnet motor, which aims at realizing the effective adjustment of the air gap magnetic field of the permanent magnet motor, has always been a hot and difficult point in the field of motor research. . Permanent magnet memory motor (hereinafter referred to as "memory mot...

AI Technical Summary

Problems solved by technology

However, this kind of motor has two magnetic potential sources at the same time, and the magnetic fluxes of the two are easy to couple and influence each other, which increases the complexity of electromagnetic characteristics, and has weaknesses such as increased excitation loss and difficulty in implementing the excitation current control system.

[0008] Patent CN200910196558.0 discloses a doubly salient pole memory motor. For the first time, the concept of "memory motor" is integrated into the stator permanent magnet motor to achieve efficient online magnetic adjustment, but the motor only uses low coercive force aluminum Nickel-cobalt permanent magnets, and due to the double salient pole operation mechanism, the motor has a unipolar flux linkage and a back EMF close to the trapezoidal wave, which makes the torque density and torque ripple of the motor larger, and the industrial applicability is poor. In addition, The armature slot area of ​​the motor is smaller than that of the pulse winding slot, which greatly reduces the power density and force performance of the motor

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