1. The theoretical life of this kind of electrolytic capacitor is more than 10 years. Many Japanese inverter can be used continuously for 10 years without any problem.

2. There is a formula that can be used to calculate the service life of electrolytic capacitors, which is the Arrhenius formula. According to this formula, we can know that the point solution capacitance has a great relationship with the temperature of the environment. In other words, there is a requirement for the maximum service temperature t0 when the capacitor is designed. The lower the actual operating temperature T is, the longer the service life of the electrolytic capacitor will be. If t works at the maximum temperature T0, the service life will be about 11 months.

3. In general, the bus capacitance and the maximum temperature t0 of the frequency converter are relatively high when they are designed. Generally, there are 85 ° and 105 ° t0 values. If the manufacturer produces in strict accordance with the standard and the users use it under the temperature of 30 ° or less, that is to say, if the frequency converter works in the air-conditioning room, the bus capacitance of the frequency converter can be used for 10 years, but if the frequency converter is at 50 ° C Under the condition of use, about two and a half years to replace the bus capacitor.

4. Although the working mechanism of electrolytic capacitor is different from that of battery, its charging and discharging is only a physical process without chemical reaction. However, there is a problem, that is, it can not be idle for too long. It is necessary to keep a certain amount of electricity in the capacitor for a long time. Even if the circuit of the capacitor is broken, there will be leakage current. If there is no charge, the capacitor will be damaged If you don't use the frequency converter for half a year, you should turn on the power once to save the power. It can be used for about half an hour to avoid that the electrolytic capacitor is broken and you can't use it when you want to use the frequency converter.

5. If the bus capacitance decreases, it may be normal at no-load, but once loaded, there may be over-voltage and under-voltage alarms. Some may also have over-current, especially during acceleration and deceleration. When the current is high, the output voltage fluctuates greatly, causing the inverter to fail to work normally.

6. The process of electrolytic capacitor also determines the service life. For example, Japanese made, Japanese radish pit by pit can control the defect rate within 10 parts per million. The workshop management is very fine, the material selection is also very important, the sealing and heat dissipation control is better, the electrolyte per unit volume is more, and the pressure resistance of aluminum foil is also very rational, which will directly affect Bus capacitor life.