Research Of DSP-Based Control System For Permanent Magnet Synchronous Motor

With the discovery of new kind of Permanent Magnet material and the development in manufacturing permanent magnet synchronous motor(PMSM), the PMSM control system have accepted more and more concerns. So, the research of PMSM control system must be a kind of inevitable development trend and the focus in the future. This paper uses TMS320LF2812 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 folio wings:The research work of this thesis, both academic and practical, mainly on the speed-adjustment system of permanent magnet synchronous motor (PMSM), which is typical in control systems of AC motor.Firstly, this thesis summarizes and analyzes the evolution, the present, and the prospect of control systems and PMSM based on a large number of referenced materials. Besides, it makes an introduction on the structure and control strategies of the universal PMSM speed-adjustment systems.Then the hardware and software design are presented. The main loop circuit, the micro-processor, the interface circuit and the power unit of the control system are introduced in hardware design. In software design, this article introduces the main control program and the main interrupt program. More, it introduces some program, like SPWM develop process, e.g. Electromagnetism Compatibility (EMC) of digital system is also discussed in this paper.Finally, according to the analysis of these experimental results, some conclusions from this thesis have been proved. The design method of protection circuit and crosstalk reduction is proposed. A reliable system is developed and verified.