Embedded type mixing magnetic material fault-tolerant cylindrical linear motor

Abstract

The invention discloses an embedded type mixing magnetic material fault-tolerant cylindrical linear motor which comprises primary bodies and secondary bodies. The length of each primary body is smaller than that of each secondary body. An air gap is reserved between each primary body and the corresponding secondary body. Each primary body comprises armature teeth, fault-tolerant teeth and a coil winding. The 2*m armature teeth and the 2*m fault-tolerant teeth are uniformly distributed on each primary body, wherein m is the phase number of the motor and is larger than or equal to three; the armature teeth and the fault-tolerant teeth are arranged at intervals in a staggered mode. Only one set of disc-shaped coil windings are placed into an armature tooth groove of each primary body. No windings are arranged on the fault-tolerant teeth. The secondary bodies of the motor are made of mixing magnetic materials, a part of ferrite is used for replacing a part of rare earth permanent magnets to form four different mixing magnetic material structures, on one hand, the quantity of the adopted rare earth permanent magnets is greatly reduced, and the cost of the motor is reduced; on the other hand, as the magnetic energy product of the permanent magnets is reduced, the eddy-current loss of the motor is reduced greatly, and efficiency of the motor is improved.

Description

technical field [0001] The invention relates to a novel motor and a phase-short-circuit fault-tolerant fault-tolerant control method, in particular to a five-phase fault-tolerant permanent magnet linear motor and a phase-short-circuit fault fault-tolerant vector control method thereof. It is suitable for occasions that have high requirements on the reliability and dynamic performance of the motor, such as aerospace and electric vehicles. Background technique [0002] With the development of society and the improvement of people's living standards, the requirements for the comfort, safety and stability of car driving are getting higher and higher. As an important part of modern automobiles, the performance of the suspension system has an extremely important impact on the ride comfort and operational stability of the vehicle. Therefore, the research on active suspension systems has been highly valued by the industry. As the core component of the active electromagnetic suspens...

AI Technical Summary

Problems solved by technology

[0006] In view of the deficiencies in the existing motor fault-tolerant control technology, and the characteristics of the five-phase embedded hybrid magnetic material fault-tolerant cylindrical linear motor proposed by the present invention and the phase short circuit fault characteristics of this type of motor, the purpose of the present invention is to overcome the motor phase short circuit fault After the current fault-tolerant strategy uses current hysteresis control, the switching frequency of the inverter is disordered, the response speed of the motor is reduced, the dynamic performance is poor, the current cannot be followed accurately, the noise is serious, and the existing fault-tolerant control algorithm is complicated. The high-performance short-circuit fault-tolerant vector control method used in the five-phase embedded hybrid magnetic material fault-tolerant cylindrical linear motor of the present invention realizes high fault-tolerant performance, high dynamic performance, and good current follow-up of this type of motor system in a short-circuit fault state performance, reduce CPU overhead, realize constant inverter switching frequency, reduce noise, facilitate electromagnetic compatibility design, and further improve the dynamic performance and reliability of the five-phase embedded hybrid magnetic material fault-tolerant cylindrical linear motor of the present invention under short-circuit fault conditions sex

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