Q: What is the difference between a single capacitor and a double capacitor?

A: The double capacitor asynchronous motor is also called "capacitor starting and running type", which refers to a motor with a starting capacitor and a running capacitor. This starting device is generally called a "centrifugal switch" and can also be manually disengaged.

The running capacitor also helps to start the motor at the beginning, but it always accompanies the motor. Its main role is to balance the electromagnetic relationship between the main winding and the secondary winding of the motor and reduce the electromagnetic dead angle to maximize the power of the motor and reduce noise and vibration.

There are two cases for single capacitor motors. The first type is called "capacitor start-up", and the only role of this capacitor is to help the motor start. This type is generally used on single-phase motors with a power of more than 300W. The second type is called "capacitor run type", and this type of capacitor has both the function of starting and running. This type is generally used on motors below 300w.

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