Study On Permanent Magnet Generator And Its Control System In Vehicle Application

According to the study on permanent magnet (PM) generator and its control system in vehicle application, this dissertation is devoted to the study on run characteristics, design method and control system of PM generator for autos. At the same time, the future power supply model of generator for autos is given. Three parts are included as follows:First of all, the basic circuit equation of radial PM generator for autos is given. The effect of reciprocity of PM and winding's magnetic force upon winding's inductance and current upon magnetic circuit saturation are analysed. According to these, we can obtain optimized design.According to technology difficulties of PM generator for autos and the analysis of existing magnetic circuit of PM generator for autos, a magnetic circuit for this item is given. The main PM generator parameters are obtained. The optimized design is concerned by Multi-SUMT method. Ventilated hole at rotor is adopted for improving ventilation and cooling condition and power density. An optimized position of ventilated hole is obtained by electromagnetic field computation. According to these analyses, three PM generators for autos are designed. The generator is verified to be of well performances by experiment.The third part concerns the control system of PM generator in vehicle application by commutating and inversion. Considering the development of future power supply of auto electric system and the economizing on energy, the multi-voltage power supply system for future autos power supply system is introduced, and the design is given in detail. The waveforms of main parts of this system are given. The system is verified to be of well performances by experiment.