Discharging DC link capacitors in an NPC converter
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United States of America Patent
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Dec 5, 2017
Grant Date -
Feb 16, 2017
app pub date -
Oct 28, 2016
filing date -
Apr 29, 2014
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Abstract
A method is disclosed in one embodiment for discharging DC link capacitors. In one form the method includes switching a first half bridge of a first converter unit to a positive state, in which its AC output is connected with its positive DC output, and simultaneously switching a second half bridge of a second converter unit to a negative state, in which its AC output is connected with its negative DC output, such that a DC link capacitor of the first converter unit and a DC link capacitor of the second converter unit are interconnected oppositely to each other and discharged via the electrical filter.
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