High performance and full digital AC position servo system

This paper proposed an advanced technology, which based on DSP and FPGA, applied in the fully digital and high-performance permanent magnet synchronous motor (PMSM) AC servo system. In this system, DSP unit implemented the position loop control by adopting the combination of PI control and feedforward control, while FPGA unit implemented the speed loop and current loop control. The functions of vector control algorithm, velocity and current sampling, space vector pulse width modulation and PI algorithm were included in this special control IC. In the meanwhile, it also provided various host communication interfaces that can realize the real-time modification of the control parameters in the IC. Finally, the experimental results indicate that this system has high-speed response and well dynamic and static state control performance.