Electric power supply device for e.g. engine fan of motor vehicle, has unit reducing intensity of current flowing via electromagnetic relay coil and activated when mobile contact is in active position, where coil controls contact movement

摘要

#CMT# #/CMT# The device (10) has a circuit (14) comprising an electric power supply source (16) and an electromagnetic relay (18) equipped with a coil (20) controlling the movement of a mobile contact (22) between a rest position (PR) and an active position (PA). A circuit (24) imposes a current flowing through the coil of sufficient intensity to move the mobile contact from its rest position towards its active position. A unit (30) reducing the intensity of the current flowing through the coil is activated when the mobile contact is in the active position. #CMT#USE : #/CMT# Used for supplying electric power to an electric unit (claimed) e.g. engine fan, daytime running lamp and pump of cooling circuit, in a motor vehicle. #CMT#ADVANTAGE : #/CMT# The unit reducing the intensity of the current flowing through the coil is activated when the mobile contact is in the active position, thus limiting heating of the coil to avoid damage to the coil while ensuring efficient functioning of the electromagnetic relays. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a schematic view of a device supplying power to an electric unit. PA : Mobile contact`s active position PR : Mobile contact`s rest position 10 : Electric power supply device 12 : Electric unit 14, 24 : Circuits 16 : Electric power supply source 18 : Electromagnetic relay 20 : Coil 22 : Mobile contact 30 : Current intensity reducing unit.