Engine power generation device

Abstract

A generator system arranged to respond to a variation in the load with a generous margin regardless of a change in the output of the generator or the engine due to degradation with the passage of time. The output current of the generator is rectified by a converter composed of thyristors in a bridge configuration of which the direct current output is converted by an inverter into an alternating current at a commercial frequency and connected to a load. The engine speed is controlled so that the conduction angle of the thyristors in the converter can be held at a target degree. As the target degree stays within a range smaller than the maximum limit, the generator runs with a margin, thus readily responding to a variation in the load. When the throttle opening is excessively opened, the target conduction angle is decreased to increase a target speed of the engine, hence inhibiting the engine from being overloaded and running at an excessive higher speed.

Description

technical field

[0001] The present invention relates to an engine generator, and more particularly, to an engine generator capable of maintaining smooth control even when the engine does not generate a predetermined output by controlling the number of rotations of the engine to a target number of rotations in accordance with the magnitude of the load. Background technique

[0002] An inverter device for stabilizing an output frequency is frequently used in an engine generator used as an AC power supply device. In such an engine generator, an engine connected to a generator is driven to generate an alternating current, and after converting the alternating current to a direct current, the inverter device converts the alternating current to a commercial frequency and outputs it. In a generator using an inverter device, since the output frequency does not depend on the number of revolutions of the engine, the output can be controlled according to the load by controlling the numb...

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