Fault-tolerant power generation system for excitation loss fault of electric-excitation doubly salient machine, and control method thereof

Abstract

The invention discloses a fault-tolerant power generation system for the excitation loss fault of an electric-excitation doubly salient machine, and a control method thereof. The system consists of anexcitation power circuit, an excitation power supply, a main power circuit, a main-power power supply, a controller, an energy storage capacitor, a load, an electric-excitation doubly salient machineand a position sensor, wherein the main power circuit is formed by connecting three groups of H-bridge convertors in parallel. An excitation current value is detected in real time, when an excitationloss fault is detected, the excitation power supply is cut off, the system is switched into an excitation loss fault fault-tolerant operation mode from a normal excitation operation mode, the switching tube of a main power converter is controlled to independently provide armature current required for the electric and power generation operation of the excitation loss fault so as to realize the fault-tolerant operation function of the excitation loss fault of the machine, the operation reliability of the electric-excitation doubly salient machine under various environments is improved, and thesystem is suitable to be applied to industries including aerospace, automobiles and the like.

Description

technical field [0001] The invention belongs to a motor system and a control method, in particular to an electric excitation double salient pole motor loss-of-excitation fault fault-tolerant power generation system and a control method thereof. 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 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 generating, which has the application prospect of start...

AI Technical Summary

Problems solved by technology

[0004] Purpose of the invention: Aiming at the defects of low power generation efficiency and high device requirements in the prior art, the present invention provides a fault-tolerant power generation system and its control method for electrically excited double salient pole motor loss-of-excitation faults

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