THE OUTPUT VOLTAGE CONTROL SYSTEM OF SINGLE-PHASE INDUCTION GENERATOR USING THE SELF EXCITATION CAPACITANCE CONTROLLER

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 unit to change the capacity of the capacitor with on/off frequency of a semiconductor switch by including an inductor to be electrically resonated by being connected with the capacitor in parallel, and a pair of semiconductor switches to control or change current flowing in the inductor; and a control unit to control the switching frequency of the semiconductor switch by measuring the rotary speed or the size of generation voltage of the single-phase induction generator. According to the present invention, the generation voltage can be produced even if the rotary speed of the single-phase induction generator is less than or equal to a rated speed as the capacity of a self-excitation capacitor can be changed in accordance with the rotary speed or the size of generation voltage of the single-phase induction generator. Moreover, optimum voltage production efficiency can be maintained even if the rotary speed of the generator increases excessively.