Due to the highly integrated variable frequency power supply , the overall structure is compact, and the heat dissipation capacity is large, the temperature, humidity and dust content of the installation environment are relatively high. When the variable frequency power supply is installed, a suitable operating environment must be provided for the variable frequency power supply. The ambient temperature of the variable frequency power supply is -10 to 50°C. If the ambient temperature exceeds -10 to 50°C, this is the best rated current for running variable frequency power supplies. Otherwise, the temperature rise of the equipment will be too high, and the equipment (especially the IGBT power module) will be more easily damaged, which will seriously affect the normal safe operation.
If the operating environment of the variable frequency power supply does not meet the environmental requirements required for the work, the failure rate of the variable frequency power supply is very high. From the perspective of the long-term efficiency and cost benefits of enterprise production, it also affects the operating efficiency of the variable frequency power supply, resulting in an increase in the failure rate of the variable frequency power supply and shortening the service life of the variable frequency power supply. In order to ensure that the variable frequency power supply can run for a long time, efficiently and safely, to ensure The variable frequency power supply avoids unnecessary economic losses. For most customers of new and old variable frequency power applications, the following precautions should be paid attention to.
(1) Working temperature. High-power variable frequency power supplies are assembled from high-power components, and require relatively high temperature. The product usually requires -10 to 50°C, but it is safe and reliable, and there is room for consideration when working. When using, it is best to adjust the temperature below 40°C, strictly abide by the installation requirements in the product manual, and do not install heat-prone or heat-generating components near the bottom of the variable frequency power supply.
(2) Ambient temperature. If the temperature is too high and the temperature changes significantly, condensation may occur in the variable frequency power supply, the insulation performance will be significantly reduced, and a short circuit accident may occur. Therefore, the desiccant and heater should be added to the inverter cabinet as needed.
(3) Corrosive gas. If the concentration of corrosive gas in the environment is high, it will not only corrode the leads of parts and circuit boards, but also accelerate the aging and deterioration of materials and equipment and reduce the insulation performance.
(4) Vibration and shock. If the control cabinet is subjected to variable frequency mechanical vibrations and shocks, the electrical contacts will be damaged. At this time, not only the mechanical strength of the control panel is improved and kept away from vibration and shock sources, but also vibration-generating components such as electromagnetic switches are fixed inside and outside of the variable frequency by using vibration resistance. You should also use the rubber pads of the electrical cabinet, which must be inspected and repaired after the equipment has been running for a long time.