How to choose the capacitor of AC fan motor? Let’s take a look at the 90-550W heat pump ac fan motor supplier.
The 90-550W heat pump ac fan motor supplier tells you that when the capacitance of the AC fan is greater than the specified value, it will increase the working current of the motor, which will easily cause the motor to overheat and burn. If the capacity does not exceed 15% of the original capacity, it can still be used.

The AC cooling fan has a small capacitance: 90-550W heat pump ac fan motor supplier tells you to use 1.2uf instead of 2.5uf, it can be used. The only error is that the torque decreases and the speed decreases. Using small capacitors can also start AC AC fans, which are usually called small horse-drawn carts by ordinary people, and have an impact on the service life of the capacitors. The impact on the motor is that the AC fan should start within 30 seconds, because it may take 1 minute to start when replacing the small capacitor. It is conceivable that the motor will generate heat. Life will also be shortened.
The supplier of 90-550W heat pump ac fan motor tells you that the capacitor is used to start the motor. The speed is controlled by the current of the governor. I said the heat is because you changed the small capacitor, which prolonged the start-up time of the AC fan motor. It has already had an impact on the engine. I suggest you don't change it too small, that's why.
The supplier of 90-550W heat pump ac fan motor tells you that since most of the AC cooling fans are single-phase, direct use of single-phase electricity cannot generate enough starting magnetic field and cannot maintain good operation. Therefore, this kind of motor generally has two windings, namely the main winding and the auxiliary winding. The main winding is directly incorporated into the circuit, and the auxiliary winding is connected to the circuit after passing the capacitor. In this way, the auxiliary winding has an angle difference, and the capacitor plays the role of phase shifting, which is equivalent to obtaining two-phase electricity, and the phase is different, so the rotor can be started, and then the main winding maintains the magnetic field for other operations, and the auxiliary winding continues Push so that it does not stop due to external forces. Ensure good operation. The 90-550W heat pump ac fan motor supplier tells you that the starting capacitor can only change the starting speed of the AC fan. If you don’t believe it, you can search for a function of capacitance. Once the AC fan is started, that is, once the capacitor is discharged, it can only isolate the direct current. No longer participate in the operation of AC AC fans. Because the capacitor has only charging and discharging functions.