Patent ID: 8598723

Claim:
A hybrid engine-driven power generator which comprises a power generator ( 3 ) driven by an engine ( 2 ) and a battery ( 4 ) for power generator main bodies, and has a rectifier ( 51 ) for rectifying an output of the power generator ( 3 ), an inverter ( 53 ) for converting an output of the rectifier into an AC output to be a generator output, and a DC/DC converter ( 9 ) for boosting a DC voltage of the battery ( 4 ) and inputting the boosted voltage into the inverter ( 53 ), comprising: an engine revolution frequency detecting means ( 20 ); a means ( 21 ) for calculating an outputtable current of the power generator ( 3 ) based at least on an engine revolution frequency; a load current detecting means ( 22 ); a means ( 23 ) for calculating a lacking amount of the outputtable current of the power generator ( 3 ) based at least on the load current; a controlling means ( 24 ) for controlling the DC/DC converter in order to supply a current corresponding to the lacking amount from the battery ( 4 ) to the inverter ( 53 ); and a means for detecting a terminal voltage of the battery; and a means ( 25 ) for deciding whether the terminal voltage of the battery is a reference voltage or more for deciding the remaining amount of the battery ( 4 ), wherein when the terminal voltage of the battery ( 4 ) is the reference voltage or more, the controlling means ( 24 ) supplies a current corresponding to the shortage of the current value to the inverter.