| 摘要 |
The present invention relates to an output voltage control system of a single phase induction generator, comprising: a capacitor connected in parallel to a sub-wire of the single phase induction generator; an auxiliary circuit part for varying the capacity of the capacitor with an on/off frequency of a pair of semiconductor switches, provided with an inductor that is connected in parallel with the capacitor and resonates electrically, and a pair of semiconductor switches that interrupt a current flowing in the inductor or vary the direction of the current flowing in the inductor; and a control part for controlling the switching frequency of the semiconductor switches by measuring the rotational speed of the single phase induction generator or the magnitude of a generation voltage of the single phase induction generator. The present invention has an advantage wherein the capacity of a magnetic excitation capacitor varies according to the rotational speed of the single phase induction generator or the magnitude of the generation voltage, the generation voltage can be generated even when the rotational speed of the generator is greater than or equal to a rated speed, and the optimum voltage generation efficiency can be maintained even if the rotational speed of the generator is drastically increased. |
