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A PWM inverter with an induction motor often has a problem with a leakage current that flows through the distributed electrostatic capacitance from the motor windings to the ground. The authors present an analytical model of the system with leakage current and the strategy to suppress it. Two types of suppression circuit are discussed. The current-type circuit, although compact in size, not only acts as an excellent suppressor but also becomes a high-performance filter of the output voltage.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
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Murai et al. (1992) studied this question.
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