When designing or manufacturing frequency inverters, many manufacturers fail to treat the materials used for internal components such as printed circuit boards and metal parts to prevent moisture and mold growth. If such frequency inverters operate in a humid environment for extended periods, the internal metal components are prone to corrosion, especially the conductive copper busbars, which are subject to accelerated corrosion under high temperatures.
Here are a few tips to prevent inverter spare parts from getting damp and moldy:
Rusting can easily reduce the lifespan of a frequency inverter or cause complete damage, especially the tiny copper wires on the internal microcomputer control board and drive power board, which are most susceptible to corrosion. If the frequency inverter needs to operate in a humid environment, the internal components must be treated to prevent moisture and mold growth in order to prevent rusting.
There are many methods for preventing moisture and mold growth on frequency converters. For example, the printed circuit board can be coated with conformal coating, or nickel-chromium plating can be used on structural components. The control cabinet of the frequency converter also plays a role in preventing moisture and mold growth; for example, a dustproof control cabinet can be used.
The control cabinet for frequency converters can be designed to be dustproof, including the use of protective mesh, dustproof mesh, and protective top cover air outlets. The dustproof control cabinet for frequency converters can be installed in a separate, enclosed air-conditioned room. This installation method is more suitable for controlling multiple devices, and the cost of building such a room is lower than for situations where the cabinet itself is individually enclosed.
The air inlet of the frequency converter control cabinet should be independently located at the bottom of the cabinet and connected to the trench. The trench should be independent and sealed, and a dust screen should be installed at the air inlet of the dustproof cabinet. If the trench connected to the frequency converter control cabinet is more than 5 meters long, a blower should be considered to maintain ventilation.
A dryer or activated carbon can also be placed inside the inverter's control cabinet to ensure the absorption of moisture or other toxic gases and prevent corrosion of the inverter's materials. The desiccant or activated carbon needs to be replaced in a timely manner.
