Active Damping in Series Connected Power Modules with Continuous Output Voltage
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Reutlingen University
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Ulmer Sabrina   

Reutlingen University
Power Electronics and Drives 2021;6 (41)
This paper presents a modular and scalable power electronics concept for motor control with continuous output voltage. In contrast to multi-level concepts, modules with continuous output voltage are connected in series. The continuous output voltage of each module is obtained by using GaN HEMTs as switches inside the modules with a switching frequency in the range between 500 kHz and 1 MHz. Due to this high switching frequency a LC filter is integrated into the module resulting in a continuous output voltage. A main topic of the paper is the active damping of this LC output filter for each module and the analysis of the series connection of the damping behavior. The results are illustrated by simulations and measurements.
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