The Research On Permanent Magnet Synchronous Generator Rectifing System

As the means of the green environmental protection traffic, electric vehicle (EV) has been regarded by every developed countries. The EV technology is growing rapidly. The principal task is to research and design a PWM rectifier system used in Intergrated Starter/Alternator (ISA) system of hybrid electric vehicle (HEV).Firstly, this paper analyses the research status of HEV and ISA at home and abroad and the operating principle of Permanent Magnet Synchronous Genetator with rectifing load. Secondly, the topological structure of the Permanent Magnet Synchronous Genetator is devised. And the feasibility of equivalent between the rectifier system with Permanent Magnet Synchronous Genetator and the three-phase voltage source rectifier (VSR) is confirmed.Subsequently, the design of the system parameters in main loop are analyzed in this paper. Specially we focused on the design of the The DC-side capacitance and AC-side inductance.Besides,the specific parameters is proposed. Then the designing of regulators in double-loop VSR system are analyzed in detail. A modified PID control algorithm used in voltage loop is proposed, which guarantees both the response time and the overshoot. The results of system simulation with MATLAB/SIMULINK proved the advantage of the proposed algorithm and the validity of the parameter chosen. The results of experiment confirmed the validity of theory analysis too.Texas Instruments digital signal processor (DSP), TMS320F2407A, is used as the controller, and the full digital vector controlling system is achieved, which is used in the ISA of HEV for energy feedback. The controlling system can meet the requirement of subject improved by the experimental results, which manifest the adjustable of output voltage and current, the rapidity of the dynamic response, the high accuracy of controlling, the good stability and the high efficiency of the rectifier system.