Design and analytical inductance calculations of five-phase fault-tolerant permanent-magnet Machine

Multiphase fault-tolerant machines have many advantages, such as high reliability, high-power transmission under low voltage and so on. Therefore, they are attracting more and more attention in recent research. A design method for the multiphase fault-tolerant machine is proposed in this paper. The five-phase fault-tolerant permanent-magnet machine designed by the method realizes thermal, magnetic, electrical and physical isolations among phases, and it satisfies all the requirements of the fault-tolerant machine. The inductance parameters of the machine play an important role in designing the control system. Therefore, an analytical approach to calculate the inductance parameters of the machine is put forward. The self-inductance and mutual-inductance are calculated, and the results are precise. The proposed method avoids the complexity caused by establishing the finite-element model of the machine. The inductance parameters obtained by the analytical method are consistent with the finite-element simulation results, which validates the effectiveness of this method.