What causes the temperature of the film capacitor to be too high

What causes the temperature of the film capacitor to be too high

In summer, the temperature is getting hotter and hotter. Many people come back home and touch the motor body of their home. They feel that their home appliances are no longer needed because they are hot. In fact, many household appliances will heat themselves when they are in use, such as the refrigerator, although the function of the refrigerator is to refrigerate and refrigerate, but its body shell is hot when working, we can feel the shell of the refrigerator is hot. Then the capacitors that make up the household appliances themselves will also heat up, but to different degrees.

For example, thin-film capacitor is an electronic component that is not easy to heat up. Thin-film capacitor itself heats up, and has low heat and low temperature, which is a normal phenomenon. The internal temperature of the film capacitor increases slightly during use, but normally the temperature of the film capacitor is not too high when it is heated. If the heating temperature is too high, it is abnormal. The higher the temperature, the longer the film capacitance will be used.

So what are the common causes of the film capacitor overheating? There are several reasons for this:

1. High ambient temperature

The ambient temperature is too high, causing the film capacitor to heat itself but the heat cannot be emitted, just like you are very hot in summer, but the ambient temperature is higher than your body temperature, the heat cannot be emitted, heating your body with heat is prone to problems. The same is true for film capacitors. When the ambient temperature is too high to dissipate heat from the film capacitors, the working time of the film capacitors will be shortened in the long run.

2. Inappropriate selection of film capacitance

The wrong type selected in the use of the film capacitor results in a voltage that exceeds the rated voltage. When the voltage exceeds the rated voltage, the film capacitor becomes slightly hot and bursts if the voltage exceeds the rated voltage.

3. Bad film capacitance used

Many manufacturers try to attract customers by lowering the cost of producing thin film capacitors with inferior materials and labeling them as thin film capacitors of the same type but at a lower price. However, the poor film capacitance itself is not technically competent and can be easily broken down when working. In serious cases, it will also burst and cause electrical losses.