Study Of The Controller For Hybrid Electric Vehicle Motor Based On DSP2812

With cars'increasing globally, energy crisis and environment pollution are becoming a bottleneck that constrains the development of the world automotive industry. Meanwhile the advantage of the newly emerging Hybrid Electric Vehicle (HEV) on energy conservation and emission is being reflected. Since it combines a regular engine with electrical power to drive the car, the motor it carries and the study of its driving control system have become one of the most key technologies in its research and development, which directly determines vehicle's power performance, fuel economy and emission.Firstly, this dissertation compared several common electric vehicles'performances, introduced the development of HEV motor and its control technology. Secondly, the dissertation compared the performances of several AC motors, and the Permanent Magnet Synchronous Motor (PMSM) became the first choice in this subject with its high work efficiency, high power density and favorable speed adjustment performance. According to HEV motor's power and the structure characteristics of PMSM, this dissertation selected arrangement form for motor system structure. Thirdly, this dissertation established the mathematical model of PMSM. An analysis of vector control was also made, on the principle of which PMSM motor vector control system's hardware structure based on TMS320F2812DSP was designed. And some essential units of the system were described in detail, such as power circuit, speed and position detection circuit, current feedback and over-current protection circuit, and CAN communication module. The software structure and some key subprogram, such as current sampling, location detection and SVPWM are expounded.Finally, through prototype and bench system test, a great of experimental data were obtained. On the basis of these data the prototype's characteristics and shortcomings were tested, the closed-loop control of the system was realized, so as to achieve the purpose of exploration and research of HEV with PMSM control system.