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The author summarizes important developments in AC drive design that have occurred in the past several years. He discusses: converter technology, covering the matrix converter, PWM voltage and current link converters; and resonant link converters; AC motor technology, covering stepping motor drives, DC brushless motor drives, and synchronous reluctance motors; and control technology for AC drives, covering online and offline parameter identification and efficiency-maximizing control.>
T.Α. Lipo (Fri,) studied this question.