If the inverter is to run the equipment again after being shelved for more than half a year, the probability of damage may be greatly increased due to many factors such as the placement environment, the service life of the inverter, and the load rate, and the failure usually presents the following problems:
1. After the equipment is energized, the inverter will blow up the machine and the pre-circuit breaker will jump off.
2. After starting, the inverter panel is not displayed
3. The inverter runs normally after starting, but it fails after operation
4. The inverter runs normally after starting, but it appears to be a frying machine after operation
Why is there a phenomenon of inverter failure described above?
1. The improper placement environment of the inverter will lead to the above problems.
2. The inverter is composed of rectifier module, IGBT and electrolytic capacitor and other primary components, during which if the electrolytic capacitor is not energized for a long time, it will cause the electrolyte in the electrolytic capacitor to dry up, so that the capacity decreases and the leakage increases. In this way, when the inverter is powered, the switching power supply operation will be abnormal or damaged, and in serious cases, this will lead to the electrolytic capacitor of the main circuit being damaged, resulting in the explosion of the inverter.
Why do some inverters still work normally after being placed for a period of time?
1. The inverter storage environment is good
2. The inverter has not been working for a long time under overheat or overload conditions
3. The service life of the inverter is short
4. The capacitance characteristics inside the inverter are better than **
How to prevent the inverter from powering failure?
1. If the inverter is not used for a long time, it should be sealed and stored in a dust-proof and moisture-proof environment, and the storage temperature is -25C-65C.
2. It is safer and more useful to use special equipment to charge the inverter regularly (once every 3 months) and check the input and output ports. 220 volts are supplied to a 380 volt inverter (110 volts are supplied to a 220 volt inverter) and the voltage slowly rises from 0 volts to 220 volts. The duration is determined according to the power of the inverter. Then, supply 380 volts (220 volts) to the drive and look at the input voltage. Only an imbalance of +/- 3% was promised.
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