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A maximum power control of wind generator system using a permanent magnet synchronous generator and a boost chopper circuit

The wind generator system using a boost chopper for generation control of permanent magnet synchronous generator is proposed. And, the theoretical analysis of characteristics of power generation is discussed. By replacing the main circuit composition of generator and boost chopper with the equivalent circuit, characteristics for generating power and DC output voltage were expressed by the function of duty ratio of the boost chopper and generator rotational frequency. Electric power supplied from the generator is characterized by the condition of the load with the peak point. Therefore, the optimum duty ratio for obtaining the maximum power was theoretically determined by differentiating the characteristic equation of generating power with respect to duty ratio of the boost chopper. It was verified experimentally by the construction of the simulator of the wind generator system, and the validity of derivation technique for the maximum power point was confirmed.