ALTERNATING CURRENT (AC) LOAD PRE-CHARGE PROTECTION
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United States of America Patent
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app pub date -
Jul 31, 2017
filing date -
Aug 1, 2016
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Abstract
In at least one embodiment, a vehicle apparatus including a power conversion device is provided. The power conversion device is further configured to receive a direct current (DC) output voltage and invert the DC output voltage into an alternating current (AC) based signal to drive one or more AC loads in a vehicle. The power conversion device is further configured to measure the DC output voltage during a pre-charge operation and to provide a diagnostic threshold during the pre-charge operation based on the measured DC output voltage. The power conversion device is further configured to determine a plurality of accumulated values during the pre-charge operation, each accumulated value is indicative of a measured current across a resistive element. The power conversion device is further configured to compare the plurality of accumulated values to the diagnostic threshold during the pre-charge operation.
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