Torque Performance of Multi- Phase Reluctance DC Machines: Design Optimisation and Analysis

Research on Reluctance machines over the past 20 years have been on axially laminated rotor structures, control aspects, Reluctance machines with square current waveform excitation (RDCMs) and also on the design analysis of the machines by the use of mathematical formulas. Research results reveals that there is a need for a different rotor structures as the axial one is difficult to manufacture and also on performance analysis to include the overall design of the RDCMs with suitable current waveforms. The book will focus on the critical evaluation of the torque performance of the optimum designed Multi-phase RDCMs with normal laminated salient pole rotor allowing for high speed, high power applications. Optimum designed RDCMs can best be obtained by the use of FEM in the design optimisation process. It was found amongst other things that torque performance of 6 phase RDCM is slightly higher than its 5 phase counterpart. The book is suitable for FEM design and analysis of Electric machines with special emphasis on Reluctance Machines. It can be recommended as a text book for graduate students in their Electric machine design course.