Design And Implementation Of Simulation And Verification Platform Of Motor Drive Unit For HEV

Energy Saving and Environmental Protection have become two important themes in automobile development. The development of new energy vehicle technology has become an important direction of the future automotive technology. O ur country has made a "three vertical and three horizontal" layout of the research and development of new energy automotive technology. As one lateral part, drive motor and its control system is one of the key technologies in the development of new energy vehicles. Therefore,the paper, based on the semi physical simulation system dSPACE, designs a rapid development and verification platform for PMSM control system and proposes a method of the rapid development and implementation of the motor prototype control system.Based on the idea of modular design,the rapid development and verification platform is divided into six functional modules, including control module, drive module, power module, sensor module, signal conditioning module and load module. The functions of each module are designed and the system get integrated and optimized according to the division. The final system is completed.O n the basic of the plantform, the developments of the SVPWM and the DTC prototype control system for 3kW PMSM are completed and get validated by test for the feasibility and the general-type. At the same time, the characteristics and advantages of the two control strategies are analyzed and compared. In which, the Flux observer of DTC is improved by using first-order filter and amplitude limiting compensation. The test data proved that the performance of the SVPWM on speed control is better and the volatility of torque is less. The performance on fast-response of the DTC is more superior.The experimental results show that the control algorithm model can be built fast in MATLAB/Simulink of dSPAC E. The software and hardware interface is connected by RTI/RTW and the programing codes are automatically generated and download to the hardware. The development process does not need tedious and error prone coding, reducing the workload of developers and saving more time and energy to optimization the algorithm. The system realizes online-debugging in the experimental environment built by ControlDesk. Any variable can be tracked accord ing to the need and system parameters can be modified real-time online according to the real-time running effect until getting the optimum parameters. Parameters tuning, analysis and optimization can be done online, which simplifies the working process and shorten the development cycle compared with the traditional process “debug- modification and Optimization –debug”. The platform has good feasibility and good practical value, which laid the foundation for in-depth study of the drive motor and its advanced control technology for HEV.