Using one FPGA to control two high-switching-frequency PMSM drive systems through a novel time-division multiplexing method

In order to reduce the resources utilization of Field Programmable Gate Array (FPGA) chip thereby using one FPGA to control multiple motors together, a novel time-division multiplexing (TDM) method is proposed in this paper. The field-oriented control (FOC) algorithm is developed using Xilinx system generator (XSG) in Matlab/Simulink environment. Due to the fast calculation speed of FPGA and the pipeline optimization technology, the execution time of FOC algorithm can reach <;2.5 μs and the switching frequency can be increased to >100 kHz. In order to verify the proposed TDM method, the dual-motor scenario is studied in this paper. Experimental results show that by adopting the proposed TDM method, the resource utilization of the FPGA chip can be further greatly reduced.