A Digitally Controlled 125 kVdc, 30kW Power Supply with an LCC Resonant Converter Working at Variable DC-link Voltage: Full Scale Prototype Test Results

• Published in: 7th IET International Conference on Power Electronics, Machines and Drives (PEMD 2014) p. 1.4.03
• Main Authors: Gavin, S, Carpita, M, Ecoeur, P, Biner, H.-P, Paolone, M, Louokdom, E.T
• Format: Conference Proceeding
• Language: English
• Published: Stevenage, UK IET 2014; The Institution of Engineering & Technology
• Subjects: DC-DC power convertors; Digital signal processing chips; Power electronics, supply and supervisory circuits; variable DC link voltage; resonant power convertors; power supply circuits; power 30 kW; diode voltage doubler; phase shift control; voltage multipliers; DC-DC power convertors; digitally controlled power supply; TMS320X28335 DSP microcontroller; voltage 125 kV; LCC resonant converter; high output voltage power converter; digital signal processing chips
• ISBN: 1849198152; 9781849198158
• DOI: 10.1049/cp.2014.0297

In this paper, a high output voltage power converter working at variable input DC-link voltage is presented. The variable DC link voltage opens to very interesting solution at system level. However, those solutions will be the subject of futures papers. Only the main power converter structure is presented here. After an evaluation of the most promising converter topologies for the required high voltage and power, eventually an LCC resonant converter with phase shift control has been chosen. The resonant converter is followed by a double secondary high frequency transformer with a two diode voltage doublers. The system has been fully analysed from the theoretical point of view, designed, built and tested. The control system has been fully digital implemented making use of a TI DSP microcontroller, TMS320X28335.