Engine operated generator

摘要

An engine operated generator is arranged to constantly respond to a change in the load with a margin of power. The output current of the generator (1) driven by an engine (2) is rectified by a converter (3) composed of a thyristor bridge structure. A direct current released from the converter (3) is converted by an inverter (4) to an alternate current at a commercial frequency and connected to a load (5). A thyristor driver circuit (9) controls the conduction of thyristors so that the voltage at the input of the inverter (4) is constant. A fuel flow controller (10) detects the conduction angle of the thyristors and the revolution of the engine (2) is controlled so that the conduction angle is converged on a target conduction angle. Since the target conduction angle is set within a predetermined range smaller than the maximum conduction angle, the generator is maintained with margins of its output and can thus provide a stable level of voltage and respond quickly to a change in the load.