| 摘要 |
A small portable generator for generating a single-phase AC voltage under PWM control is subject to output voltage fluctuations under a heavy load. With a view to reducing such output voltage fluctuations, it is intended to provide a portable generator (100) which rectifies an AC voltage generated by an AC generator (50) with a DC-voltage-generating circuit (110) using thyristors to charge a DC-power-source unit (120), and converts the DC output voltage of the DC-power-source unit (120) with an inverter circuit (130) into a single-phase AC voltage to be supplied, the portable generator (100) being provided with a constant-voltage-control unit (500) which effects control to keep the DC voltage of the DC-power-source unit (120) substantially constant by detecting the voltage of the DC-power-source unit (110) and controlling the continuity angle of the thyristors (111) in the DC-power-source unit (120), and at the same time effects control to advance the start of continuity of the thyristors (111) when the amperage flowing to the inverter circuit (130) becomes great.
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