TORQUE-EQUALIZING FAULT RESPONSE FOR LOSS OF LOW VOLTAGE DC ELECTRICAL POWER IN ELECTRIC VEHICLE
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United States of America Patent
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Issued Date -
Aug 31, 2023
app pub date -
May 10, 2023
filing date -
Jul 29, 2021
priority date (Note) -
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Abstract
An illustrative dual power inverter module includes a detection circuit configured to detect loss of low voltage DC electrical power supplied to a controller for a first power inverter and a second power inverter of a drive unit for an electric vehicle. A first backup power circuit is associated with the first power inverter and a second backup power circuit is associated with the second power inverter. Each backup power circuit is configured to convert high voltage DC electrical power to low voltage DC electrical power responsive to detection of loss of low voltage DC electrical power supplied to the controller. Three-phase short circuitry is configured to apply a same fault action to the first power inverter and the second power inverter responsive to detection of loss of low voltage DC electrical power supplied to the controller, wherein the same fault action includes applying equalized torque to each axle operatively coupled to the drive unit.
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