A control method for a fault-tolerant power generation system for an electrically excited doubly salient motor under loss of field faults

Abstract

The invention discloses a fault-tolerant power generation system and a control method thereof for an electric excitation double salient pole motor for demagnetization fault. The system consists of excitation power circuit, excitation power supply, main power circuit, main power supply, controller, energy storage capacitor, load, electric excitation double salient pole motor and position sensor, in which the main power circuit is composed of three sets of H-bridge converters connected in parallel constitute. By detecting the excitation current value in real time, when the loss of excitation fault is detected, the excitation power supply is cut off, and the system switches from the normal excitation operation mode to the fault-tolerant operation mode of the loss of excitation fault. The armature current required for power generation operation is used to realize the fault-tolerant operation function of the motor loss of excitation fault, which improves the reliability of the electrically excited double salient pole motor in various environments, and is suitable for use in aerospace, automotive and other industries.

Description

technical field [0001] The invention belongs to a motor system and a control method, in particular to a control method for a fault-tolerant power generation system for a demagnetization fault of an electrically excited double salient motor. Background technique [0002] The stator and rotor of the electric excitation double salient pole motor are salient pole cogging structure, the armature winding is wound on the stator, the excitation winding is embedded in the stator slot, and there is no winding on the rotor, which has the advantages of simple structure, flexible control and good fault tolerance performance. Advantages, it has broad application prospects in aviation, new energy and other fields. The electrically excited doubly salient pole motor provides the air gap magnetic potential through the excitation winding, and the different control methods of the armature winding can make it run in two modes of motoring and power generation, which has the application prospect o...

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