FPGA-realization of a high-performance controller for PMLSM drive

This study presents a high-performance position controller for permanent magnet linear synchronous motor (PMLSM) drives based on FPGA (field programmable gate array) technology. Firstly, a mathematic modeled for PMLSM drive is defined. Secondly, to increase the performance of the PMLSM drive system, an AFC (adaptive fuzzy controller) constructed by a fuzzy basis function and a parameter adjustable mechanism is derived and applied to the position control loop of PMLSM drive system to cope with the effect of the system dynamic uncertainty and external load. Thirdly, an FSM (finite state machine) joined by a multiplier, an adder, a LUT (look-up table), some comparators and registers is presented to model the overall AFC, and VHDL is adopted to describe the circuit of FSM. After that, an FPGA is used to implement the overall control algorithm for PMLSM drive. Finally, an experimental system is established to verify the effectiveness of the proposed high- performance control system and some experimental results are confirmed theoretically.