A NEW GENERATOR TOPOLOGY FOR WIND POWER GENERATION

This paper illustrates the concept of an electrical machine designed for wind turbine application. Recent studies in this domain propose the use of dual magnetic circuit through a double stator or double rotor for various applications. As a reference wind generator developed using an outer rotor developed with a dual magnetic circuit. To design a generator with capabilities of delivering electrical power output through connection with a wind turbine, generators on the basis of slots-poles combination configuration were designed with interior permanent magnet implementation on rotor using numerical design tool. Through this software finite element analysis is applied to the models and analyzed based on the magnetic flux results. The model configuration of 125-10P is selected as it provides an increase of 33% in magnetic flux flow. Furthermore, the machine is further modeled under two modes of half motoring and only generating operation to increase the capability of wind turbine operation under the low wind speed. The efficiency obtained when simulated under various low wind speed condition is an average of 75% under half motoring condition while when operated in completely generating mode under the optimum wind condition the efficiency lies in the region of 75%.