A Voltage Control Strategy and Analytic Models for a 42-V Automotive Power Generation System with Induction Generator and PWM Rectifier

An efficient, high-power generation system is needed to meet the growing electric power demand in automobiles. This paper is concerned with the design and implementation of a 42-V automotive power generation system by using induction generator and pulse-width-modulation (PWM) boost rectifier. Based on rotor field-oriented control scheme, the control models of the ac and dc voltage of the system are developed analytically. The ac induced voltage of the generator is regulated with stator reactive current for achieving controllable condition of boost rectifier during varying speed. To improve the suppression of dynamic voltage during load-dump and jump-start charging, the dc output voltage of rectifier is regulated with stator active current matching to load. The effects on the dynamic voltage are investigated and the systematic design and analysis of the proposed method is also presented. Theoretical results of the analysis are verified experimentally with real-time simulation.