Inverter device

Abstract

Abstract PURPOSE:To obtain a stepwise wave output power near a sinusoidal wave with a simple circuit configuration by coupling a 3-phase inverter and a single-phase inverter via a semiconductor switch. CONSTITUTION:A 3-phase bridge inverter 1 is composed of 6 semiconductor switches S1-S6, and the current flowing angles of the switches are smaller than 180 deg.. A single phase inverter 2 alternately opens and closes semiconductor switches S7, S8 at the primary side of an output transformer T to generate a rectangular voltage, thereby obtaining the stepwise wave single-phase voltage via tap changer semiconductor switches Sa, Sb of the secondary side of the transformer. A connecting switch 3 is composed of 3 semiconductor switches SU, SV, SW, and has a function of applying a single-phase voltage during the period that the voltages of terminals U, V, W are not established. A capacitor C has functions of producing a neutral point N of a DC power source and smoothing the DC input voltage.

Inventors

• 👤 Kuniomi Oguchi
• 👤 大口　國臣

Bibliographic Details