Abstract
Conventional PM (permanent magnet) synchronous motor drives are supplied by PWM (pulse width modulation) inverters. The limitation of the inverter's control variables has two important consequences: a reduction of the average torque; and important current and voltage ripples. In this paper, two strategies are proposed to deal with this problem for a two-current loop structure. The first one allows the use of the maximum available voltage without current distortions in case of successive limitations. The second one is an attempt to maintain a set of balanced voltages at the machine terminals to reduce the torque ripples in case of double limitations.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
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