Stator permanent-magnet double salient pole fault-tolerant motor

Abstract

The innovation points of the invention are that stator core is designed as E shape, and one fault tolerant tooth is added to each stator core. Winding is enwound on armature tooth and permanent magnet on two sides of E shaped stator core. There is no winding on fault tolerant tooth. Windings on radial opposite two poles are connected in series to constitute one phase. Fault tolerant tooth insulates phase windings. Excitation magnetic field is produced by permanent magnet. Fault tolerant tooth provides magnetic loop for permanent magnet and armature winding. The invention makes circuit, magnetic circuit, and temperature field independent between phase to phase of motor. The fault tolerant motor possesses higher reliability, and capability of operation under fault. Reducing width of gullet can reduce pulsation of torsion. Magnet core can run at inflection point of magnetization curve. The motor is especially suitable to areas of high reliability of continuous operation.

Description

technical field [0001] The invention relates to the technical fields of electrician and motor, in particular to a novel stator permanent magnet double salient pole fault-tolerant motor. Background technique [0002] With the development of social economy and science and technology, the application field of motor drive system continues to expand, such as electric steering gear (EMA), which is more and more widely used in advanced aircraft such as aircraft, missiles and spacecraft, and the rapid development of electric steering gear in recent years. Applications such as automobiles that have high requirements for continuous operation require not only small size, light weight, and high efficiency of motors, but also high reliability, strong fault tolerance, and maintenance-free motors to meet the needs of aircraft, electric vehicles Limited energy, harsh working environment and other characteristics. [0003] The switched reluctance motor has a simple and sturdy structure, ado...

AI Technical Summary

Problems solved by technology

However, experiments have shown that even if permanent magnets with low magnetic energy products are used, the magnetic field of the motor is very saturated, and the magnetic load of the motor is high, so the eddy current loss is large in high-speed operation.

Also, because the specific gravity of the permanent magnet is greater than that of the silicon steel sheet, too many permanent magnets also increase the weight of the motor

In terms of phase-to-phase independence, doubly salient permanent magnet motors and flux-switching permanent magnet motors have serious phase-to-phase coupling, and the mutual inductance of the motor is about half of the self-inductance, and the phase independence is poor.

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