The advantage of application of IGBTs in PWM-inverters in industrial motor drives with three-phase voltage of 400 V and medium power range are well known. To extend the application to industrial motor drives with three-phase voltage of 690 V and to local traffic with dc-line voltage of 600/750 V three level IGBT inverters present a good solution. In this paper some details regarding the realization of the power circuit and the pulse pattern generator with space vector modulation are explained. Three level IGBT inverters are now successfully applied in drives for modern low floor trams. The advantageous performance of these inverters will be illustrated.
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