Two-Staged 50kW DC-Charger with Output Voltage Range from 200V to 940V
Conference: PCIM Europe digital days 2020 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
07/07/2020 - 07/08/2020 at Deutschland
Proceedings: PCIM Europe digital days 2020
Pages: 8Language: englishTyp: PDF
Authors:
Niessen, Martin; Deck, Patrick; Dick, Christian P. (TH Köln, University of Applied Sciences, Germany)
Conrad, Marcus (AixControl GmbH, Germany)
Abstract:
In this paper the design and operation of a bidirectional 50 kW DC-charger is presented. The two-staged system consists of an active front-end converter and a series-resonant converter with variable input-to-output voltage conversion ratio using pulse-skipping. This setup is able to achieve a voltage range from 200 V up to 940 V. The full charging/discharging power can be reached at voltages from 320 V up to 940 V. To keep the volume of the converter relatively small, a switching frequency from 95 kHz to 120 kHz is chosen. In order to reduce switching losses of the DC/DC-Stage, a soft-switching scheme is applied which leads to ZVS on the powering side and ZCS at load side.