Novel Thyristor-Based Pulsed Current Converter for a Medical Application – a Conceptual Introduction

Konferenz: PCIM Europe 2018 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
05.06.2018 - 07.06.2018 in Nürnberg, Deutschland

Tagungsband: PCIM Europe 2018

Seiten: 6Sprache: EnglischTyp: PDF

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Wettengel, Stefan; Lindenmueller, Lars; Bernet, Steffen (Technical University of Dresden, Institute of Power Engineering, Chair of Power Electronics, Germany)
Schramm, Ulrich; Kroll, Florian; Brack, Florian-Emanuel (Helmholtz-Zentrum Dresden-Rossendorf e. V., Institute of Radiation Physics, Germany)
Pawelke, Joerg (OncoRay – National Center for Radiation Research in Oncology, Germany)

A novel ion beam radiation therapy apparatus employing pulsed high magnetic field coils for transporting the ion beam has been proposed. In this paper a new pulsed current converter topology is introduced, which can be used as a pulsed power supply for the therapy apparatus. Thyristors are selected as the semiconductors used in the pulsed current converter. Since the planned operating point is outside of the typical range of the semiconductors, research has been done to predict their behavior during turn-off (the most critical phase of the pulse). A behavioral model has been derived and experimentally parametrized to predict the turn-off behavior and to optimize snubber design.