Patent ID: 9384926
Filing Date: 2016-07-05
CPC Classification: H01H

Claim Text:
1. A method for restoring a relay from a stuck fault to a normal condition in an apparatus comprising a power source unit, the relay, a relay driver, a Main Control Unit (MCU), and an Electronic Control Unit (ECU), the method comprising steps of: detecting, by the MCU, a short state or open state of the relay; repeatedly transferring, by the MCU, a current application signal and a current non-application signal to the relay driver when the relay is in the short state; repeating, by the relay driver, an operation of periodically applying an electric current from the power source unit to the relay in response to the current application signal and the current non-application signal so that a release of a contact point of the relay is induced; detecting, by the MCU, the release state of the contact point of the relay; and maintaining, by the MCU, the ECU in an operating state when the contact point of the relay is released.