Patent ID: 9738160
Date: 2017-08-22
CPC Classifications: B60L,Y02T

Claim:
1. A fail-safe method for high voltage parts in a hybrid vehicle, comprising: determining, by a hybrid control unit (HCU), whether or not a high voltage main relay is turned off, and when the high voltage main relay is turned off, increasing a counter electromotive force generated in a motor generator linked with a revolution of an engine by raising the revolutions per minute of the engine and charging a voltage into a direct current (DC) link using the counter electromotive force generated in the motor generator; performing, by a voltage controller, voltage control such that the voltage of the DC link is uniformly maintained using an inverter for the motor generator; and driving the high voltage parts through power of the DC link that is voltage-controlled, wherein the performing of the voltage control includes controlling the inverter so as to: wherein the torque command from the voltage controller is adjusted by a difference obtained by comparing a target voltage value of the DC link and actual detected value of the DC link such that the voltage of the DC link is maintained by the adjustment of the torque command from the voltage controller.