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摘要

Here's one of those seemingly obvious questions that you'd think would have been settled by now. With no single vendor making all motor types, how do you go about comparing them to find the best one for your design? If you happen to be asking this question of 42-volt machines and are in the automotive business, Motorsoft Inc. of Lebanon, Ohio, may have your answer―or, at least, the means to produce one. The company makes a kit that contains four breeds of identically sized motors. According to Motorsoft's president, Jim Hendershot, the four three-phase motors that make up the kit―an ac induction unit, a brushless permanent magnet synchronous type, a switched reluctance design, and a synchronous reluctance model―if grouped alongside a dc brush motor and a stepping motor, would constitute most of the known motor universe. Could it really be that easy―the whole motor game in a take-along six-pack? Read on.