FAIL-SAFE METHOD AND APPARATUS FOR A HIGH VOLTAGE PARTS IN HYBRRID ELECTRIC VEHICLE

摘要

The present invention relates to an apparatus and a method for performing emergency driving of a high-voltage part in a hybrid vehicle, which are made to enable driving of a high-voltage part even in the event of a failure of a high-voltage main relay in order to solve the problem that the vehicle cannot be driven due to no operation of a high-voltage part such as an electric oil pump when the high-voltage main relay fails. To this end, the present invention provides a method for performing emergency driving of a high-voltage part in a hybrid vehicle. The method comprises the steps of: determining whether a high-voltage main relay is turned off, and charging the voltage of a DC link end through counter electromotive force generated from motor generators which are connected to an engine to be linked with the rotation thereof when the high-voltage main relay is turned off; and controlling the voltage to constantly maintain the voltage of the DC link end using inverters for the motor generators.