Analysis and simulation for voltage regulation system of doubly salient electro-magnetic generator based on sliding mode control

A voltage regulation system of doubly salient electro-magnetic generator based on sliding mode control has been proposed in this paper. Based on mathematical model and working principle of the generator, sliding mode control law has been constructed. Then, the method about the coefficient selection of sliding mode was deduced, and the stable characteristic of generator system was proved by Lyapunov function. Moreover, the relation between the sliding mode coefficient and stable region of the system was analyzed in detail. Finally, a “field-circuit” co-simulation model of voltage regulation system of doubly salient electro-magnetic generator using sliding mode control was built by electromagnetic finite element analysis and transient solver of control circuit. The steady state and dynamic response performance of the generator at different speed show that doubly salient electro-magnetic generator using sliding mode control will acquire better dynamic response characteristic than one using PI output voltage feedback and exciting current feed forward control.