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Description
Evolutionary designs in the packaging of SiC high frequency MOSFETS by CREE® permit the design of compact DC-DCHV power supplies operating at frequencies >100 kHz. A system that uses a DC input of 300 volts from a NiMH rechargeable battery has been built. The battery chemistry is insufficient to source applicable ampacity to efficiently convert the power to elevated kilovolt (kV) potentials at higher converter switching frequencies. The development team acquired compact 6 mF, 125 volt rated capacitors from the Evans Capacitor Company® to provide prompt current delivery for the MOSFET-switched power electronics. A series/parallel combination of Evans capacitors was assembled and placed as an input filter to the converter. A series fuse and contactor are used to isolate the NiMH prime power from the Evan filter capacitance and the converter. The results of Evans capacitor and CREE® MOSFET component testing and integrated system performance (Vout, power, efficiency) will be reported.
