The function of the relay is to control the relay coil […]
The function of the relay is to control the relay coil with a switch, then the working contact of the relay is closed or disconnected, one end of the contact is connected with the current of the main line, and the other end is connected with the electric appliance to be controlled to realize a small current to control a large current, and the switch is prevented from being A large current causes the switch to burn out. Protects lines and switches.
The role of car relays in automobiles mainly depends on: car lights, wipers, starters, air conditioners, power seats, electric windows and doors, anti-lock devices, suspension controls, audio, etc. Controllable electronic devices must use control relays.
The role of automotive relays in automotive lighting: Commonly used automotive lighting control relays, mainly three-legged, four-legged and five-legged control relays. Control the headlights, front small lights and instrument lights, turn lights, rear lights, brake lights, reverse lights, fog lights, car lighting and so on. When the combination switch is turned to the headlights ON position, the control system of the headlight relay (the field coil part) is energized to generate a magnetic field, and the alloy contacts are immediately closed, and the current of the control system is turned on, thereby controlling the opening of the headlights. When the combination switch is turned to the headlights OFF position to disconnect the power supply, the magnetic field disappears and the control alloy contacts are immediately separated, the current of the controlled system is cut off, and the headlights are turned off.