A New Modulation Technique to Control the Switching Losses for Single Phase Three-Level Active-Neutral-Point-Clamped-Inverters

Konferenz: PCIM Europe 2017 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
16.05.2017 - 18.05.2017 in Nürnberg, Deutschland

Tagungsband: PCIM Europe 2017

Seiten: 8Sprache: EnglischTyp: PDF

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Autoren:
Ruthardt, Johannes; Woelfle, Julian; Zehelein, Matthias; Roth-Stielow, Joerg (University of Stuttgart, Germany)

Inhalt:
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.