Research Of Permanent Magnet Synchronous Motor Control System Based On DSP And FPGA

With the rapid development of motor technology, power electronics technology and computer technology, multi-disciplinary, permanent magnet synchronous motor in the military, industrial, aerospace and other fields can be widely applied. Permanent magnet synchronous motor compared with ordinary AC variable frequency motor, without loading collector ring and brush, reduced machining and assembly processes, has a simple structure, high efficiency, high reliability, the study of permanent magnet synchronous motor having Significance. Since the conventional permanent magnet synchronous motor using hexagonal or circular magnetic flux control chain of control, there is a torque ripple is too large, flux mutation and other defects, the control system will cause varying degrees of influence. To solve these problems, this paper based on DSP and FPGA combination of permanent magnet synchronous motor direct torque control system.This topic microelectronic technology and control algorithms by combining the use of DSP and FPGA cooperative control of permanent magnet synchronous motors. In the section of permanent magnet synchronous motor control algorithm, a mathematical model of PMSM, it describes the traditional direct torque control strategy. Analysis showed that the traditional direct torque control system in selected sectors voltage near the boundary of an error voltage vector, resulting in an increase in the amplitude of the magnetic flux, but the choice is to reduce the amplitude of the voltage vector magnetic flux, resulting in a series of two conflicting control erratic results. To solve the above problems, improve the effect of the traditional control strategy, this paper Vectors Subdivision direct torque control strategy, the six voltage vector in the traditional sense and six flux subdivided into a plurality of sectors and space voltage vector magnetic chain segment, and to develop appropriate switch table, select the correct voltage vector switches according to the table to control the motor. On this basis, the DSP and FPGA design permanent magnet synchronous motor control system for dual-controller, while built SIMULINK simulation models to verify the feasibility of the algorithm is implemented on a permanent magnet synchronous motor. The hardware control system, including hardware configuration of the overall structure, DSP+FPGA digital control circuit, main power circuit, IPM driving circuit, DSP peripheral circuits, FPGA keyboard, display circuit and protection circuit. Software control of the design of the main control program, DSP external interrupt handling procedures, testing procedures, ADC conversion process, the control algorithm program, FPGA key procedures.By Simulink simulation results show that breakdown of permanent magnet synchronous motor vector proposed direct torque control strategy is superior to the conventional direct torque control strategy. Build a permanent magnet synchronous motor control system hardware platform, software and hardware by the FBI proves the feasibility of this strategy.