Patent ID: 6989655

Claim:
An engine generator comprising a generator connected to an engine, a rectifier circuit which rectifies the output of the generator, and an inverter in which the output of the rectifier circuit is converted into AC power of a predetermined frequency for output, wherein the generator is a dual-purpose generator both for a generator function and for an electric motor function, a drive inverter circuit which drives the dual-purpose generator as an engine starting electric motor is provided, the rectifier circuit comprises rectifying elements which are provided in parallel with each switching element of the drive inverter circuit, a DC—DC converter, in which a low DC voltage on a primary side and a high DC voltage on a secondary side are set for the output-terminal side of a battery and the output side of the rectifier circuit, respectively, is provided between the output side of the rectifier circuit and the output terminal of the battery, and the dual-purpose generator is driven as an engine starting electric motor, using the battery as a power supply, when the engine is started.