Electromagnetic torque analysis of wind-driven SRG with ferrite magnet

Abstract

The present paper analyses the effect of placing the ferrite magnet into the rotor air barrier of synchronous reluctance generators (SRG) on its electromagnetic performance. The paper uses a difference of average electromagnetic torque and ripple torque as a measure of the performance index. Here, in the analysis, a magnetic material is placed in the middle of each air barrier, and its size is symmetrically increased on both sides to increase the percentage of the volume of the magnetic material. The effect of an increase in the volume of the magnetic material on its performance is presented. Moreover, the variation in electromagnetic features such as the d− and q-axes inductance and flux linkage are also explored and compared for different volumes and ferrite material. In the present work, finite element analysis is used to get the electromagnetic performance. The paper also includes hardware validation on the fabricated prototype of SRG (without ferrite magnet), but SRG with a ferrite magnet only includes the results with FEA simulation.