Double-channel fault tolerant type flux switch permanent magnet motor and control method thereof

Abstract

A dual-channel fault tolerant flux switch permanent magnet motor is a novel stator permanent magnet motor. The fault tolerant motor adopts a doubly salient structure, and the inner loop of the stator (1) is provided with salient poles evenly. Permanent magnets (3) are arranged onto the circle of the stator in pairs, which can be cooled easily; the rotor (2) adopts a simple salient structure, without windings nor permanent magnets. The fault tolerance motor integrates the advantages of a switch magnet resistance motor and a rotator permanent magnet fault tolerance motor, and has the advantages of high credibility, high power density, and preferable operating capacity when a failure occurs. The invention provides a fault tolerance strategy, and can improve the electromagnetic performance of the motor when a failure occurs by adjusting the phase and amplitude of non-fault phase current; the invention can accomplish the torque output in the approximately normal running status and have high theory and practical value.

Description

technical field [0001] The invention relates to the technical fields of electrician, motor and control, in particular to a novel stator permanent-magnet fault-tolerant motor and its control method, which is applicable to the high-reliability field with strict requirements on the continuous operation of the system. Background technique [0002] With the continuous expansion of the application range of motors in military, industrial, civil and other fields, the reliability of motor drive systems has received more and more attention from scholars in related fields, especially in aerospace, military equipment, mine rolling steel, etc. Reliability is particularly important when the operation has high requirements. These application fields require the motor drive system to have high reliability and strong fault-tolerant operation capability. [0003] As far as the technical level is concerned, the ways to improve the reliability of the system can be mainly divided into two method...

AI Technical Summary

Problems solved by technology

However, since its permanent magnets are installed on the surface of the rotor, when the motor is rotating at high speed and heats up, it is prone to failure due to its difficulty in cooling, resulting in a decrease in the reliability of the motor. Therefore, it is used in the field of high reliability (its main application background). Applications are very limited

To sum up, these two fault-tolerant motors, which are currently concerned by the academic community, have disadvantages in terms of power density and reliability while having high fault-tolerant performance.

Images