Any product will be damaged if it is not used properly or used for a long time. In summer, the frequency of air conditioning is increased, and sometimes the power supply will be inexplicable. The capacitor element may be damaged. Why is electrolytic capacitor damaged in frequency converter?
The rectifier tube is damaged
When a rectifier tube in the rectifier bridge is broken down, AC component will appear in the rectified voltage, and the filter capacitor will be damaged due to the reverse voltage on the filter capacitor.
Uneven voltage distribution
When one of the equalizing resistors is damaged, the voltage distribution on the two series capacitors becomes unbalanced, and the capacitor with higher voltage is easy to be damaged.
Excessive leakage current of capacitor
When the electrolytic capacitor is connected to the circuit, there is leakage current. Under normal conditions, the leakage current is very small. However, if the leakage current will increase due to the aging of capacitor or poor quality of capacitor itself, the electrolytic capacitor will be damaged due to serious heating.
The above three points are the common causes of electrolytic capacitor damage in frequency conversion equipment.