[Object]It is to provide a contactor welding diagnosis device capable of avoiding an erroneous contactor welding determination even when a motor rotates during a contactor welding diagnosis.[Solution]A contactor welding diagnosis device includes: a high-voltage battery 4 as a main power source; an inverter 3 to drive a motor 2 with electric power supplied from the high-voltage battery 4 thereto; a negative electrode side contactor 41 and a positive electrode side contactor 42 to electrically connect/disconnect the high-voltage battery 4 and the inverter 3 to/from each other; and a contactor welding diagnosis unit 5 to switch the contactor between the connection/disconnection to thereby diagnose whether the negative electrode side contactor 41 and the positive electrode side contactor 42 are welded based on a change of an applied voltage to the inverter 3 at the switching, when starting the vehicle 1, the contactor welding diagnosis unit switching the contactor to the disconnection when a rotation speed of the motor 2 reaches a first rotation speed or higher.
CONTACTOR WELDING DIAGNOSIS DEVICE
DIAGNOSEVORRICHTUNG FÜR DAS SCHÜTZSCHWEISSEN
DISPOSITIF DE DIAGNOSTIC DE SOUDAGE DE CONTACTEUR
04.01.2023
Patent
Elektronische Ressource
Englisch
CONTACTOR FAILURE DETERMINATION DEVICE AND CONTACTOR FAILURE DETERMINATION METHOD
Europäisches Patentamt | 2017
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