SWITCHING CIRCUIT

摘要

A low-power-loss switching circuit for use as a high-power switching circuit, such as an inverter circuit (1), which converts DC power from a solar battery or fuel cell system into domestic AC power. The switching circuit comprises a series circuit (23) of a silicon transistor (21) and a non-silicon transistor (22), or a parallel circuit (26) of a silicon transistor (24) and a non-silicon transistor (25), or a series/parallel circuit (27) of the series circuit (23) and the non-silicon transistor (25). The conversion capability of the silicon transistors (21) and (24) is 0.1kVA-200kVA, and the non-silicon transistors (22) and (25) is composed of a SiC-base or GaN-base semiconductor.