FPGA based control strategy for the reduction of torque ripple for PMSM

This paper presents a torque ripple reduction approach to direct torque control (DTC) of a permanent magnet synchronous motor (PMSM), using a sliding mode control (SMC) technique. A distinctive feature of the approach is that, by appropriately parameterizing and implementing the sliding mode controller, the discontinuous nature of the voltage source inverter (VSI) maybe directly incorporated to the design process. The key idea is to incorporate the benefits of the VSS control design and the event-driven sequential control structures to raise the system performance and control efficiency. A predictive sliding mode controller has been developed, designed as finite state automata (FSA), and implemented with field programmable gate array (FPGA). This new logic FPGA to torque and speed controller has been developed, analyzed, and experimentally verified.