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The AC Induction Motor (ACIM) is one of the most popular motors used in consumer and industrial applications. The motor is cheap to manufacture and has high reliability because there are no brushes to wear out. On the downside, it is less efficient than other motor types. At least 90% of industrial drives have induction motors; this is a result of its robustness and low cost. Another important aspect is the low maintenance price which is a consequence of its simple and reliable design. An additional key factor is that the rotor does not have any moving contacts, which eliminates sparking.