The reverse rotation of the cooling fan is usually caused by the wire connection of the starting winding of the fan motor being reversed. Adjusting the two connectors of the starting winding can solve the problem. There are two windings inside the fan, one main winding and one secondary winding. The capacitor can change the magnetic field by degrees, causing the phase difference between the main and secondary windings to differ by degrees. If the main winding lags behind the secondary winding by degrees, the motor will reverse. Here is a detailed introduction:
1. If the wires of the starting winding of the fan motor are reversed, the fan will reverse. Adjusting the two connectors of the starting winding can solve the problem;
2. There are two windings inside the fan, one main winding and one auxiliary winding. The main winding plays a running role and the auxiliary winding plays a starting auxiliary role. Capacitors change the degree of magnetic field, causing the phase difference between the main winding and the secondary winding to differ by degrees. If the main winding leads the secondary winding by degrees, the motor will rotate forward; otherwise, if the main winding lags behind the secondary winding by degrees, the motor will reverse;
3. So, as long as the wiring of the capacitor is changed, it is easy to achieve forward and reverse rotation. You can also find a dual control switch, with terminals at both ends connected to one end of the main winding and one end of the secondary winding, and the center contact of the dual control switch connected to the live wire of the power supply. Connect the two terminals on the other end of the main and secondary windings together, connect them to the zero line of the power supply, press the on switch, and the fan motor will rotate in the positive direction. Close the switch, and the fan motor will reverse;
4. When producing household electric fans, the electric motor is only designed for forward rotation, without forward and reverse rotation. Due to the different turns of the main and secondary windings, some wire diameters are also different, so the output power, speed, and other working conditions of forward and reverse operation are also different.
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Apr 11, 2023Leave a message
What Is The Reason For The Reverse Rotation Of The Cooling Fan?
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