Working principle of electromagnetic clutch for automobile air conditioner

The electromagnetic clutch of the automobile air conditioner is controlled by the air conditioner switch, temperature controller, air conditioner amplifier, pressure switch, etc. It can turn on or off the power transmission between the engine and the compressor when needed. In addition, when the compressor is overloaded, it can also play a certain role in protection.

The electromagnetic coil is fixed on the casing of the compressor, the drive plate is connected with the main shaft of the compressor, and the pulley is installed on the compressor head cover through the bearing, which can rotate freely. When the air conditioning switch is turned on, the current flows through the electromagnetic coil of the electromagnetic clutch, and the electromagnetic coil generates electromagnetic attraction, which combines the drive plate of the compressor with the belt pulley, transmits the torque of the engine to the compressor spindle, and makes the compressor spindle rotate. When the air conditioning switch is disconnected, the suction force of the solenoid coil disappears, the drive plate and the belt pulley disengage under the action of the spring plate, and the compressor stops working.