Diagnosis-free self-repair method for open-circuit faults in dual-three-phase permanent magnet synchronous motor drive systems

Abstract

The invention discloses a double-three-phase permanent magnet synchronous motor driving system open-circuit fault diagnosis-free self-repairing method, which relates to a motor fault diagnosis technology, and belongs to the technical field of measurement and test. According to the diagnosis-free self-repairing method provided by the invention, the advantages of PI control and dead-beat control areintegrated, a reference value given by a harmonic current plane is optimized, the originally inhibited self-healing capability of the double-three-phase motor driving system is fully exerted, high-performance fault-tolerant control is achieved, the fault type does not need to be diagnosed in advance, the method is universally suitable for switching tube faults, motor single-phase open-circuit faults and multi-phase open-circuit faults, and the problem of long-time fault operation caused by error diagnosis and diagnosis time consumption is fundamentally solved. Meanwhile, the method does not need to modify a motor model, a modulation strategy or a control framework according to different fault types, reduces the control complexity, and reduces the adverse effect generated by a fault-tolerant scheme to the minimum.

Description

technical field [0001] The invention discloses a fault-free self-repair method for a double-three-phase permanent-magnet synchronous motor drive system, relates to motor fault diagnosis technology, and belongs to the technical field of measurement and testing. Background technique [0002] In recent years, multiphase motor drive systems have attracted more and more attention in high-power, high-reliability applications such as aerospace, electric vehicles, and naval propulsion. Among all kinds of multi-phase motors, the dual-three-phase motor drive system has become a promising new drive system because it can eliminate six torque ripples through the coordinated control of two sets of windings. In systems with high reliability requirements, early identification of any potential abnormalities and faults and implementation of fault-tolerant control can maximize the retention of the original operating performance of the motor drive system and avoid the occurrence of dangerous si...

AI Technical Summary

Problems solved by technology

At the same time, there is no need to adjust the motor model, modulation strategy and control framework, which solves the technical problems of complex control schemes, misdiagnosis and time-consuming diagnosis in the existing multi-phase motor fault-tolerant control strategy

Images