Fault-tolerant control method and system for dual-winding three-phase permanent magnetic fault-tolerant motor

Abstract

The invention discloses a fault-tolerant control method and system for a dual-winding three-phase permanent magnetic fault-tolerant motor. The fault-tolerant control method of any three-phase permanent magnetic fault-tolerant motor includes the first step of obtaining set torque, the second step of obtaining a direct-axis current set value and a quadrature-axis current set value, the third step of transforming the direct-axis current set value and the quadrature-axis current set value to obtain current set values of all phase windings under a normal condition, the fourth step of detecting actual currents of all the phase windings of the three-phase permanent magnetic fault-tolerant motor, and the fifth step of judging whether a short-circuit or open-circuit fault happens to any phase winding, calculating the current set values of all the phase windings under a fault condition according to a set current calculation formula under the fault condition if the short-circuit or open-circuit fault happens to any phase winding, comparing the current set values of all the phase windings under the fault condition with the actual currents of all the phase windings of the three-phase permanent magnetic fault-tolerant motor, and converting comparison signals to control signals of a three-phase H-bridge inverter. Through the fault-tolerant control method and system, the torque can be effectively and reasonably distributed so that the system can continue operating in failure.

Description

Technical field [0001] The invention relates to the field of permanent magnet fault-tolerant motor control, in particular to a fault-tolerant control method and system for a dual-winding three-phase permanent magnet fault-tolerant motor. Background technique [0002] Although the single-motor fault-tolerant system overcomes most of the problems in applications with higher reliability requirements, for non-backup fault-tolerant systems, a complete failure of a motor should also be considered. The redundancy of the controller and feedback system also has a beneficial effect on improving the reliability of the system. At present, only the design and fault-tolerant control of a single permanent magnet fault-tolerant motor (FTPMM) have been studied in China, and there is no feedback on power failure, controller failure and feedback. Research on issues such as system failures. Dr. Nesimi from Adelaide University in Australia proposed the topology of a dual redundancy permanent magnet ...

AI Technical Summary

Problems solved by technology

Compared with a single fault-tolerant control system, although the dual-redundancy control system improves system reliability, it increases the motor manufacturing cost and reduces space utilization

Images