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The output voltage of small wind driven generator presented non-cyclical fluctuation affected by wind speed, which then leads to unstable accumulator charging voltage. In order to improve charging efficiency and prolong accumulator's service life, this paper designed a steady voltage circuit based on UC3842. It is mainly composed by rectifier filter circuit, Buck chopper circuit and post-processing circuit. With wind power variation, the duty ratio of PWM wave outputted by UC3842 is changing accordingly. Then, the circuit will output steady voltage to charge accumulators. This design is characterized by simple circuit, relatively low cost and convenient maintenance etc.

Research on Steady Voltage Control Circuit of Small Wind Driven Generator