Applying one-comparator counter-based PWM control strategy to DC-AC converter with voltage reference feedforward control considered

In this paper, the one-comparator counter-based pulsewidth-modulated (PWM) control strategy without any analog-to-digital converter (ADC), used in the DC-DC converter, is applied to the DC-AC converter with some modifications. In addition, the voltage reference feedforward control is applied so as to reduce the burden of the proportional integral derivative (PID) controller. Via some experimental results based on the field programmable gate array (FPGA), the effectiveness of the proposed control scheme is demonstrated by the DC-AC converter operating both in steady state and in transient.