What are the daily maintenance of the inverter?

        The operator must be familiar with the basic working principle and function characteristics of the inverter and have common knowledge of electrician operation. Before routine maintenance of the inverter, it must be ensured that the total power supply of the equipment is completely cut off; and after the inverter shows that it has completely disappeared for 3-30 minutes (according to the power of the inverter). Should pay attention to check the grid voltage, improve the surrounding environment of the inverter, motor and circuit, regularly remove the dust inside the inverter, and minimize the failure rate of the inverter by strengthening equipment management.

(1) Cooling fan

The fan is a common accessory for the inverter, and the fan damage is divided into electrical damage and bearing damage. Electrically damaged fans will not operate. This can be found in daily inspections. If they are replaced immediately after discovery, the noise and vibration of the fan during operation will be significantly increased. Replace it as soon as possible. It can also be replaced according to the recommendations of the corresponding inverter manual after the fan has been used for a certain period of time (usually about 3 years).

(2) main filter capacitor

Intermediate circuit filter capacitor: also known as electrolytic capacitor, the role of this capacitor: filter out the rectified voltage ripple, and also decoupling between the rectifier and the inverter to eliminate mutual interference, but also provide the necessary motor The power is subject to extremely large pulse current, so the service life is short. Because it needs to store energy during operation, it must be energized for a long time. The heat generated by its continuous operation plus the heat generated by the inverter itself will accelerate its electrolyte. Dryness directly affects the size of its capacity. Under normal conditions, the life of the capacitor is 5 years. It is recommended to check the capacitance capacity once a year regularly. Generally, the capacity should be replaced by more than 20%.

(3) High power resistor

     Observe the surface color of the high-power resistor. If it is a cement resistor, observe whether there is crack on the surface of the resistor. If the resistance aging phenomenon is obvious (the color becomes black, severe cracking), it is required to be replaced.

(4) Use of preservatives

Due to the production characteristics of some companies, the concentration of corrosive gases in each electrical mcc chamber is too large, causing many electrical equipment to be damaged by corrosion (including inverters). In order to solve the above problems, an air conditioning system can be installed to improve the environmental conditions with positive pressure fresh air. In order to reduce the corrosion of corrosive gases on the components on the circuit board, the inverter manufacturer may also require anti-corrosion processing on the circuit board, and also spray preservatives after maintenance, which effectively reduces the failure rate of the inverter and improves the use efficiency. .

At the same time of maintenance, the inverter should be inspected carefully, and the power should be sent regularly. The motor should work at a low frequency of 2hz for about 10 minutes to ensure that the inverter works normally and do routine maintenance to prolong the service life of the inverter.