Output waveform improving method of inverter

Abstract

Abstract PURPOSE:To improve the output voltage distortion of an inverter due to a nonlinear load by multiplying an output impedance by harmonic waves of the respective orders obtained from an output current, and superposing a voltage produced by combining them on the output voltage of the inverter. CONSTITUTION:The output of an inverter 1 is supplied through a reactor 2 and a capacitor 3 to a nonlinear load 4 made of a rectifier. A current transformer 9 detects the output current of the inverter 1, and the detected current is supplied to harmonic filters 10 of the respective orders. The harmonic components obtained here are inputted to an output impedance multiplier 11 of the inverter, which multiplies and combines the harmonic components and the output impedance value. The combined output is superposed on the output voltage of the inverter 1, and the harmonic components of the voltage are compensated by the voltages.

Inventors

• 👤 Seiji Nakazawa
• 👤 仲澤　誠二

Bibliographic Details