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

Conference: PCIM Europe 2017 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
05/16/2017 - 05/18/2017 at Nürnberg, Deutschland

Proceedings: PCIM Europe 2017

Pages: 8Language: englishTyp: PDF

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

Abstract:
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.