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Fault Diagnosis of a ZVS DC–DC Converter Based on DC-Link Current Pulse Shapes

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4 Author(s)

The dc-dc converter is a critical component in a hybrid electric vehicle since it supplies power to an electronic control unit, as well as chassis electric components such as power windows, wipers, etc. In this paper, a low-cost diagnostic method for MOSFET faults in a zero- voltage-switching dc-dc converter is proposed. The proposed method utilizes the dc-link current patterns as the signatures of faults of MOSFETs. A presignal processing circuit consists of a peak detector and an integrator circuit. The ratio of peak-to-integral values, which is similar to the crest factor, is useful for diagnosis.

Published in:

Industrial Electronics, IEEE Transactions on  (Volume:55 ,  Issue: 3 )

Date of Publication:

March 2008

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