Fault-Tolerant Control of Excitation Fault in Four-Phase Doubly Salient Electro-Magnetic Generator

Doubly salient electro-magnetic motor (DSEM) has superiority in reliability as well as simple generation control under complex working environment, which has its unique advantages as aviation starter / generator. On account of strict requirement for device stability in aviation, fault-tolerant operation is particularly significant for DSEM. However, the present fault-tolerant ability mainly obtain from optimization of DSEM structure design, and the research is less on fault-tolerant operation control under DSEM with losing excitation, while the research is still blank on four-phase DSEM with losing excitation. For this purpose, a control strategy with six bridge converter is proposed, which apply to a four-phase DSEM with losing excitation, and the control strategy makes the DSEM successively generate power even if no excitation current. Besides, it also is verified by simulation.