2017 年 137 巻 10 号 p. 776-785
We propose a control system to be applied to a single-phase PWM inverter used in a portable engine generator. The inverter current and output voltages are detected by sensors, and the impedance voltage drop and output voltage fluctuation are compensated by estimating the filter L voltage and filter C current, respectively. Furthermore, errors are complemented through feedback control. The study precisely describes its design method in the ideal condition. In the case of linear- and nonlinear-loads, the PWM inverter designed using the method is examined through a simulation and experiment. The PWM inverter described in this paper can output the sinusoidal voltage with low total harmonic distortion.