A comprehensive design methodology for switched reluctance machines

The description of a comprehensive design methodology for switched reluctan ce machines (SRMs) is reported here. The magnetic properties of the iron, t he number of phases, and the number of poles per phase all have a nonlinear effect on an SRM's performance. These effects, along with the sizing of th e machine envelope and internal dimensions, make the machine design an insi ght-intensive effort. Maximization of torque density, power output, efficie ncy, speed range, and first critical speed and minimization of torque rippl e, temperature rise, acoustic noise, and overall cost are among the many de sign objectives and critical issues that must be addressed during the desig n process. A design methodology that maximizes the desired features and min imizes the unwanted effects is presented here. Static and dynamic system-le vel simulations and finite-element analysis have been carried out for a fou r-phase 8/6 1.0-kW SRM as a design example to support the efficacy of the p roposed design procedure.