It’s really easy to understand the principle and structure of the motor starting capacitor

As an electrician, you must know the difference between a three-phase AC motor and a single-phase AC motor. If you pay attention to it, you will find that the single-phase AC motor has one more equipment than the three-phase AC motor. That is the starting capacitor. The most common ones are various household appliances. Starting capacitors for household appliances with motors are almost essential.

First of all, a brief understanding of the principle of starting capacitors, from a professional point of view, perhaps some are not easy to understand, if you want to know the professional information can be found. I personally understand that the starting capacitor is to give the motor a thrust when the motor starts, so that the motor can be turned up and turned. Without him, the single-phase AC motor will start to shake at the origin instead of rotating. The starting capacitor is two. The "leading angle" of the AC motor, without him, the magnetic field can not force on the rotor, of course, the rotation can not be discussed, it is easy to understand from this aspect.

Regarding the internal structure and principle of the starting capacitor in the single-phase AC motor, it is generally divided into two windings for starting and running. The starting winding is generally called an auxiliary winding, and the running winding is called a main winding.

Understand the above content, when encountering some two-phase AC motors that do not rotate, they will naturally think about checking whether the starting capacitor is damaged.

But the starting capacitor is also divided into sizes. It is not a random capacitor to make the motor run. It is too big. The motor runs too fast and will heat up. It will easily burn the motor for a long time. It is too small to give the rotor enough. The force, the thrust is too weak, the motor can not start, so when replacing the starting capacitor, do not arbitrarily change the size of the original capacitor.