A new modulation technique to control the switching losses for single phase three-level active-neutral-point-clamped-inverters

, , , und . PCIM Europe, Seite 1-8. (2017)


The lifetime of power semiconductor devices significantly depends on the thermal stress they are exposed to. In three-level active-neutral-pointclamped (ANPC) inverters the power losses - and with those the junction temperatures - are very unbalanced using conventional modulation techniques. In this paper a new modulation technique is proposed to spread the power losses across the semiconductor devices. This new modulation technique is a hybridization of the two mainly used pulse-width-modulation (PWM) techniques for ANPC-inverters. Compared with the commonly used PWM techniques the thermal stress the semiconductor devices are exposed to decreases.

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