CNThe electrical schematic diagram of the frequency conversion control cabinet is reasonably designed: no leakage protector is added to the upper port of the inverter, no contactor is added to the lower port (no frequency conversion power frequency conversion), capacitor, cooling fan is provided in the frequency conversion cabinet, and the upper port of the inverter is not used to control the start-up. stop. The reasonable layout and effective distance of the components in the frequency conversion cabinet must have sufficient heat dissipation space and reasonable wiring. The start and stop of the frequency converter should be reasonable. Do not use the catchy contactor to control the start and stop, and set free stop or deceleration stop according to the needs. Acceleration and deceleration time of the inverter, motor parameters in the inverter.
The frequency converter should be timely cleaned and maintained. During maintenance, dust and dirt inside the inverter and in the air duct should be removed; during maintenance, the inverter should be carefully inspected to see if there is any heating and discoloration in the inverter, whether there is cracking in the cement resistor, and whether there is expansion and leakage of the electrolytic capacitor. Protruding explosion-proof holes and other phenomena, whether the PCB board is abnormal, whether there are hot and yellow parts. After the maintenance is over, the parameters and wiring of the inverter should be restored, the power should be transmitted, and the belt motor should be operated at a low frequency of 3Hz to ensure that the inverter works normally.
The inside of the inverter is a high-power electronic component, which is easily affected by the working temperature. The product generally requires a temperature of 0~55°C, but in order to ensure safe and reliable operation, it should be considered when using it. It is best to control it below 40°C . In the control box, the inverter should generally be installed on the upper part of the box, and strictly abide by the installation requirements in the product manual. It is absolutely not allowed to install heating elements or components that are prone to heat close to the bottom of the inverter.
environment humidity. When the humidity is too high and the temperature changes greatly, condensation is prone to occur inside the inverter, and its insulation performance will be greatly reduced, which may even cause a short circuit accident. If necessary, a desiccant and a heater must be added to the box. corrosive gas. If the concentration of corrosive gas is high in the use environment, it will not only corrode the lead wires of 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.
vibration and shock. When the control cabinet equipped with the frequency converter is subjected to mechanical vibration and shock, it will cause poor electrical contact. At this time, in addition to improving the mechanical strength of the control cabinet and keeping it away from vibration sources and shock sources, anti-seismic rubber pads should be used to fix vibration-generating components such as the external and internal electromagnetic switches of the control cabinet. After the equipment has been in operation for a period of time, it should be inspected and maintained.
