PURPOSE:To prevent a generator driven by an internal combustion engine from being brought into an overload state. CONSTITUTION:A speed setter 47 to output a speed set signal responding to the rated rotation speed of a generator when the output current of a generator 1 is below a rated value and output a speed set signal responding to a rotation speed required for limitation of the output current to a value lower than the rated value when the output current exceeds the rated value is provided. Through operation of an actuator 41 so that a deviation Vd between a speed detecting signal Vn and a speed setting signal Vno is reduced to zero, control is performed so that the rotation speed of an internal combustion engine 2 is kept at a set value.

Power generating device driven by internal combustion engine

PURPOSE:To start a generator, simply and smoothly, by lowering the rotational speed of an engine and the output voltage of the generator upon loading, and by detecting the matching condition between the generator and the load thereof to gradually raise the rotational speed of the engine and the output voltage of the generator. CONSTITUTION:When a start signal is delivered to a setting circuit 11 upon loading, a U/D counter 12 is preset at a minimum value such that the output voltage of a generator 1 becomes a value corresponding to the load characteristics at a minimum engine speed which is capable of driving the engine. This value is, after D/A convertion, is delivered to a comparator 16 and an automatic voltage regulator 15 as a reference voltage for setting the rotational speed of the engine and for controlling the voltage, and therefore, the engine rotational speed and the output voltage of the generator are lowered. Further, the matching condition of the generator 1 and the load is detected in accordance with the outputs of a current transducer CT abd a voltage transducer PT, and if the condition is normal, the above-mentioned rotational speed and output voltage are gradually raised to be shifted into a specific operation.

System for controlling engine driven generator

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System for controlling engine driven generator