US Patent 7330366 DC-AC converter

A DC-AC converter is applicable for transforming direct current (DC) to alternating current (AC). The DC-AC converter includes a voltage boost module and a DC-AC converter module. Herein the voltage boost module includes a voltage bypass circuit and a voltage boost circuit, both of which receive input voltage from DC input power. Meantime, the voltage bypass circuit sends out the received input voltage, and the voltage boost circuit will operate to increase DC output voltage from the DC input as the DC output voltage from the voltage bypass circuit is not high enough to meet requirement by AC output power. The DC-AC converter module receives the output voltage from the voltage boost module and converts the received voltage to the required AC output power.