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Unidirectional fast switching non-isolated 100 kW fuel cell boost converter
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| Author(s) |
Otto KREUTZER, Bernd ECKARDT, Martin MAERZ |
| Abstract |
This paper describes the power electronic part of a non-isolated unidirectional 400V 100kW DCDC-converter for fuel cell vehicles that reaches a switching frequency of 150 kHz with standard industry power modules. The power modules are equipped with custom made DCB-substrates assembled with a combination of fast super-junction Si-Mosfets and SiC-Schottky Diodes. For all other components like drivers, current sensors and the auxiliary supply converter standard products have been used to facilitate an automotive specification, and a cost efficient production. The inductors are custom-made to reduce the choke losses and volume. The converter reaches an efficiency of 98\% at full load (166->400V, 590A lowside current).Furthermore a simple and reliable DC-link discharge unit is described that discharges with constant power and is far smaller and faster than a conventional resistor solution. Based on a constant current discharge device using a Power MOSFET in linear operation, it is extended with a small analog circuit to a roughly constant power discharge device. |
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| Filename: | 0174-epe2014-full-11005703.pdf |
| Filesize: | 1.48 MB |
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| Type |
Members Only |
| Date |
Last modified 2015-06-08 by System |
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