Copper consumption minimization-based axial magnetic field flux-switching fault-tolerant motor fault-tolerant control method

Abstract

The invention discloses a copper consumption minimization-based axial magnetic field flux-switching fault-tolerant motor fault-tolerant control method. With the copper consumption minimization-based axial magnetic field flux-switching fault-tolerant motor fault-tolerant control method of the invention adopted, an axial magnetic field flux-switching fault-tolerant motor can operate under a fault-tolerant state when a single-phase open-circuit fault occurs on the axial magnetic field flux-switching fault-tolerant motor, and the copper consumption of the motor can be minimized. An inverter adopts a three-phase four-bridge alarm fault-tolerant topology and judges a fault state according to phase current; when operation is normal, the inverter operates under a three-phase three-bridge arm mode, an axial magnetic field flux-switching fault-tolerant motor control system adopts an SVPWM (Space Vector Pulse Width Modulation) control strategy according to which id=0, so as to distribute d-axis current and q-axis current; and when a single-phase fault occurs, fault-tolerant control is performed, the inverter operates under a two-phase three-bridge arm mode, and magnetizes the motor through controlling the current of a fault-tolerant winding, so that the overall copper consumption of the motor can be minimized. According to the copper consumption minimization-based axial magnetic field flux-switching fault-tolerant motor fault-tolerant control method of the invention, under the single-phase open-circuit condition, and with minimizing the copper consumption adopted as an optimization objective, the motor is switched from a fault state to a fault-tolerant control state, and therefore, the reliability of a motor driving system and the operation efficiency of the motor under the fault-tolerant state can be effectively improved.

Description

technical field [0001] The invention belongs to the technical field of electric transmission, and relates to a fault-tolerant control method, in particular to a fault-tolerant control method of an axial magnetic flux switching fault-tolerant motor based on minimum copper consumption. Background technique [0002] Motor fault-tolerant control technology has important applications in aerospace, transportation, and military industries. The sustainable operation of the motor under fault conditions can effectively improve the reliability and safety of the entire system. In recent years, many domestic and foreign experts and Scholars are committed to the research of fault-tolerant motors. [0003] Axial field flux-switching fault tolerant machine (AFFSFTM) is a new type of stator permanent magnet flux switching motor, which effectively combines the concept of flux switching and axial field motor, and Use the E-shaped magnetic core to replace the original U-shaped magnetic core, t...

AI Technical Summary

Problems solved by technology

Since the axial magnetic flux switching fault-tolerant motor is a new type of fault-tolerant motor, there are no relevant literature and reports on its fault-tolerant control, but due to various advantages of the motor, it can be used in various occasions such as aerospace, transportation, and military industry. , safety and reliability issues are particularly important, so the research on its fault-tolerant control method is very necessary

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