Single-Phase Constant-Pressure Inverter Circuit and Its Control Circuit (Single-Phase Inverter and Control Circuit Thereof)

摘要

The present invention relates to a 12-step single-phase voltage source inverter circuit and its control circuit which are simply implemented by adding only one switching element to a conventional 6-step short pulse PWM (Pulse Width Modulation) inverter circuit, However, the present invention is characterized in that it comprises two input terminals, and a switching element connected in series / parallel state is added to the two input terminals. Thus, a lower number of used elements reduces the lower harmonics There is an effect that a remarkable AC output voltage can be generated as compared with the conventional single-step PWM method.