Motor driving device with fault tolerance function

Abstract

Provided is a motor driving device with a fault tolerance function. Six windings of a permanent magnet motor (1) are distributed sequentially in a mutually staggered 60-degree electric angle in a stator. The A, C, E ends of the six-phase winding are connected with the alternating current output phase of a first three-phase inverter (3), and the B, D, F ends of the six-phase winding are connected with the alternating current output phase of a second three-phase inverter (6); the other ends, a and d, b and e, c and f, of the six-phase winding are connected with the three-phase alternating current input ends of a rectifier bridge (51) of a short-circuiting device; a seventeenth IGBT module (52) of the short-circuiting device (5) is connected with the rectifier bridge (51) of the short-circuiting device (5) in parallel, and the on-off of the seventeenth IGBT module (52) controls circuit shorting and opening of a circuit on the alternating current input side of the rectifier bridge (51). A ninth IGBT module (9) is connected with the first three-phase inverter (3) in parallel, a tenth IGBT module (10) is connected with the second three-phase inverter (6) in parallel, the on-off of the ninth IGBT module (9) or the tenth IGBT module controls circuit shorting and opening of the A, C, E ends or the B, D, F ends of the six-phase winding.

Description

technical field

[0001] The invention relates to a motor drive device, in particular to a motor drive device with multiple working modes, fault tolerance function and protection for inverters. Background technique

[0002] Permanent magnet motors have high power density and high efficiency, so they are widely used in the fields of aviation, aerospace, military industry and electric vehicles. Many permanent magnet motor drives require low speed and high torque on the one hand, and a wide range of speed regulation on the other hand, that is, high-speed field weakening. At the same time, they also require high reliability or good fault tolerance. At present, multi-phase motors are mostly used to achieve fault-tolerant control and improve the reliability of the drive device. However, this method can only achieve fault-tolerant control for limited faults, and it is difficult to isolate faults, so the practicability is relatively poor. Contents of the invention

[0003] The pres...

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