Method and apparatus for high voltage isolation monitor for a vehicle
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United States of America Patent
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May 17, 2016
Grant Date -
Oct 24, 2013
app pub date -
Apr 18, 2012
filing date -
Apr 18, 2012
priority date (Note) -
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Abstract
An apparatus for monitoring a high voltage isolation in a vehicle. The apparatus comprising a power conversion device for receiving a high voltage on a power bus. The power conversion device is configured to control a first switch for enabling a first known resistance to receive the high voltage and to measure a first voltage between a first node and a ground in response to the first known resistance receiving the high voltage. The power conversion device is further configured to measure a second voltage between a second node and the ground in response to the first known resistance receiving the high voltage and to determine a first leakage resistance between the first node and the ground based on at least the first voltage and the second voltage. The first leakage resistance indicating whether the high voltage is isolated from the ground.
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