The inverter works in high temperature, high humidity, dusty, corrosive gas and vibration environment. These factors will cause the inverter to malfunction. Therefore, in order to prevent the inverter from malfunctioning and ensure the normal operation of the equipment, we usually carry out regular maintenance and inspection on the inverter during the production, so that it can work stably for a long time, and also avoid sudden damage of the inverter. Loss.
1, working temperature
The inside of the inverter is a high-power electronic component, which is highly susceptible to the operating temperature. The product is generally required to be 0 to 55 ° C. However, in order to ensure safe and reliable operation, consideration should be given to leaving room for use. It is best to control below 40 ° C. . In the control box, the inverter should generally be installed in the upper part of the cabinet, and strictly follow the installation requirements in the product manual. It is absolutely not allowed to install the heating element or the heat-prone component close to the bottom of the inverter.
2, the ambient temperature
When the temperature is too high and the temperature changes greatly, the inside of the inverter is prone to condensation, and its insulation performance is greatly reduced, and may even cause a short circuit accident. If necessary, desiccant and heater must be added to the tank.
3. Corrosive gases
If the concentration of corrosive gas is large, it will not only corrode the lead wires of printed components, printed circuit boards, etc., but also accelerate the aging of plastic devices and reduce the insulation performance. In this case, the control box should be made into a closed structure. And ventilate.
4, vibration and shock
When the control cabinet equipped with the inverter is subjected to mechanical vibration and shock, it may cause poor electrical contact. At this time, in addition to improving the mechanical strength of the control cabinet, away from the vibration source and the impact source, the anti-vibration rubber pad should also be used to fix the vibration-generating components such as the control cabinet and the internal electromagnetic switch. After the equipment has been in operation for a period of time, it should be inspected and maintained.
5, to prevent electromagnetic interference
Due to rectification and frequency conversion, the inverter generates a lot of interference electromagnetic waves around. These high-frequency electromagnetic waves have certain interference to nearby instruments and instruments. Therefore, the instrument and electronic system in the cabinet should use metal casing and shield the inverter. Instrument interference. All components should be grounded reliably. In addition, shielded control cables should be used for wiring between electrical components, instruments and meters, and the shielding layer should be grounded. If the electromagnetic interference is not handled well, the whole system will not work, resulting in failure or damage of the control unit.
6, to prevent input overvoltage
The input end of the inverter power supply often has over-voltage protection. However, if the high-voltage input time of the input terminal is long, the input end of the inverter will be damaged. Therefore, in actual operation, it is necessary to verify the input voltage of the inverter, single-phase or three-phase and the rated voltage of the inverter. In particular, when the power supply voltage is extremely unstable, there must be a voltage stabilizing device, otherwise serious consequences will result.