Electric power distribution system and topology
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United States of America Patent
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Dec 25, 2018
Grant Date -
Feb 1, 2018
app pub date -
Jul 27, 2016
filing date -
Jul 27, 2016
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Abstract
A topology for electric power distribution in a vehicle includes a high-voltage bus connected to a DC-DC electric power converter that is connected to a low-voltage DC load. The DC-DC electric power converter includes a high-voltage switching circuit, a transformer, and a low-voltage rectifier. The high-voltage switching circuit includes first and second switches arranged in series between positive and negative legs of the high-voltage electric power bus at a first node that connects to a leg of an inductor of the transformer. A controller receives a command to discharge the high-voltage electric power bus, and in response, controls a first gate circuit to operate a first switch in a linear mode, and controls a second gate circuit to operate a second switch in a pulsewidth-modulated mode. A duty cycle for the pulsewidth-modulated operation of the second switch is determined based upon the magnitude of electric current.
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