Design and optimization of high-inductance permanent magnet wind generator

The constant-current wind generator can produce significant simplification of inverter circuit and feed the power into the grid at very low and high wind speed. This paper presents the design and optimization of a small-scale high-inductance permanent magnet wind generator. In the generator design, the fractional slot windings and external rotor structure is selected. The mathematical models to calculate the main parameters of the generator are provided. The high-inductance feature of the wind generator is achieved by the optimization of the motor parameters and is verified by finite element simulation model which is built by Ansoft Maxwell software. The flux linkage and back-EMF waveforms achieved by simulation are approximately sinusoidal. The relationship between the wind generator current and the operating speed of the generator obtained by simulation has shown that the output current exhibits a small variation during a wide wind generator speed.