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To extend the application of insulated gate bipolar transistor (IGBT) inverters in motor drives to higher voltages, a three-level IGBT inverter has been developed. The power circuit realized and a pulse pattern generator with space voltage modulation are described. A method to control the middle point potential is suggested. The three-level IGBT inverter can be applied to industrial drives with a three-phase supply voltage of 660 V and drives for local traffic with DC line voltage of 600-750 V.>
Tadros et al. (Thu,) studied this question.
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