Realization of a three-axis motion control system based on DSP and FPGA

This paper is to apply DSP (Digital Signal Processor) and FPGA (Field Programmable Gate Array) to develop a three-axis motion control system (XYZ table). In this system, three PMSMs (Permanent Magnet Synchronous Motor) are adopted as the actuators, and the overall motion controller is built up by three DSPs and one FPGA. Each DSP performs the function of vector control, SVPWM (Space Vector Pulse Width Modulation) and speed PI controller and FPGA performs the function of generating the speed command, communicating with external device and data exchange with three DPSs. In the proposed system, DSP uses TI TMS320F2808, and FPGA adopts Cyclone IV P4CE6E22CBN. Four chips parallel processing will increase the performance of the three-axis servo motion control system. Finally, to evaluate the performance of the proposed three-axis motion control system, an experimental system with three PMSMs, one three-axis inverter and one three-axis control board are set up, and some experimental results with speed step response and trapezoid trajectory tracking response are demonstrated.