The Research Of PMSM Control System Based On DSP

With the discovery of new kind of Permangent-Manget material and development in manufacturing Permangent-Manget Synchronous Motor(PMSM),the PMSM control system have accepted more and more concerns. So, the research of PMSN control system must be a kind of inevitable development trend and the focus in the future, and it has great value and important meanings for Chinese researchers and the industry control. This paper uses TMS320LF2407A type of Digital Signal Processor (DSP) as the core, which is designed to be special-purpose on motor control by TI Company, and designs a set of control system for PMSM. The jobs that have been done include followings:The structure of PMSM is studied further and more deeply. The mathematic models in three types of reference frames are set up according to their relationship.SVPWM modulation is discussed thoroughly. Its realization methods with hardware and software are given respectively. The methods are of clarity of conception, simple of arithmetic, high utilization of DC voltage, especially ease of being realized by digitization.The control strategy is i_d = 0.The hardware and software are designed. The components of hardware are TMS320LF2407A DSP, current measure circuit, position and speed measure circuit, EPM Inverter circuit and so on. The software is written by C2000 assembly language, which realizes the speed and current close-loop control. The flow chart of interrupt service routine is given. The format of data, PI regulation method, speed calculation and generation of sine and cosine are explained in details.The simulation of control system is set up by use of Matlab/Simulink. All subsystems, especially SVPWM, are given. The simulation results show the correction and feasibility of the design.