A Novel AC Servo System Implementation

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 the system, DSP unit implemented the position loop control by combining PI control and feedforward control, while FPGA unit implemented the speed loop and current loop control. Since FPGA provided a kind of hardware design scheme for the control system, it had the features of a special control IC. The functions of vector control algorithm, velocity and current sampling, space vector pulse width modulation and PI algorithm were included in the special control IC. In the meanwhile, it also provided host communication interfaces that could realize the real-time modification of the control parameters in the IC. Finally, the experimental results indicate that this system has highspeed response and well static state control performance