FPGA based deadbeat control with disturbance compensator for single phase PWM inverter

A new approach for real time digital feedback control of PWM inverter is proposed, in which a deadbeat control combined with disturbance compensator and multi sampling method using FPGA based hardware controller. Adopting the disturbance compensator with FPGA based hardware controller, affection of the disturbance current can be cancelled and the tracking accuracy was much improved compared with the conventional deadbeat control method. Also progress of FPGA technology makes it possible to realize 1MHz data sampling for the state variables based on FPGA controller, which result in the improvement of the tracking accuracy between the carrier interval of the PWM inverter. Through simulations and experiments, the superiority of the proposed method was verified.