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This book offers an essential compendium on theanalysis and design of synchronous motors for variable-speed applications.focusing on synchronous reluctance and ferrite permanent-magnet (pm)synchronous reluctance machines, it provides a broad perspective on three-phasemachines for variable speed applications, a field currently dominated byasynchronous machines and rare-earth Pm synchronous machines. It also describessynchronous reluctance machines and Pm machines without rare-earth materials,comparing them to state-of-the-art solutions. The book provides readers withextensive information on and finite element models of Pm synchronous machines,including all relevant equations and with an emphasis on synchronous-reluctanceand Pm-assisted synchronous-reluctance machines. It covers ferrite-assistedmachines, modeled as a subcase of Pm-assistance, fractional slot combinationssolutions, and a quantitative, normalized comparison of torque capability withbenchmark Pm machines. The book discusses a wealth of techniques foridentifying machine parameters, with an emphasis on self-commissioningalgorithms, and presents methods for automated machine design and optimization,including a software tool developed for this purpose. Addressing an importantgap in the field of Pm-less and less-pm electrical machines, it is intended asa self-contained reference guide for both graduate students and professionalmachine designers, and as a useful text for university courses on automatedand/or optimized design of electrical machines and drives.