A passively cooled 15 kW, 800 V DCDC converter with a peak efficiency of 99.7 %

Kreutzer O, Billmann M, März M (2017)


Publication Language: English

Publication Type: Conference contribution, Conference Contribution

Publication year: 2017

Event location: Kapstadt ZA

DOI: 10.1109/AFRCON.2017.8095685

Abstract

In this paper a non-isolating high voltage (800 V) bidirectional DCDC-converter with a so far unreached efficiency of up to 99.7 % is built and tested in detail. In order to reach this goal, a SiC-MOSFET half bridge is switched at its technical maximum switching speed (200 V/ns) using an extremely low inductive switching cell. This fast and low loss switching cell is attached to a large and highly efficient custom made inductor and operated at relatively low switching frequencies of 10 to 20 kHz. An unrivaled small dissipation energy (21 W at an output power of 7.5 kW) allows the abandonment of any active water cooling, fans or cooling fins and can, just as it is, be used in almost any environment. This technique does not only save a lot of space and costs for thermal management, it can also decrease the operating costs for electric vehicle charging stations by cutting the wasted and non-saleable dissipation power by an order of magnitude.

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How to cite

APA:

Kreutzer, O., Billmann, M., & März, M. (2017). A passively cooled 15 kW, 800 V DCDC converter with a peak efficiency of 99.7 %. In Proceedings of the 2017 IEEE AFRICON. Kapstadt, ZA.

MLA:

Kreutzer, Otto, Markus Billmann, and Martin März. "A passively cooled 15 kW, 800 V DCDC converter with a peak efficiency of 99.7 %." Proceedings of the 2017 IEEE AFRICON, Kapstadt 2017.

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