Explosion-proof frequency control cabinet machinery equipment control field

The principle of the explosion-proof frequency converter control cabinet is to completely isolate hazardous and flammable gases in the air from control components through high-density sealing capability, thereby reducing the possibility. As the core component of the positive pressure explosion-proof control cabinet, the frequency converter is selected from well-known companies such as Siemens and Schneider based on different customer needs, to design and manufacture high-performance frequency conversion positive pressure explosion-proof control cabinets. The frequency converter is a power control device that applies frequency conversion technology and microelectronics technology to control AC motors by changing the frequency of the motor's working power supply. By altering the frequency of the power supply to change the voltage, it provides the required power voltage according to the actual needs of the motor, thereby achieving energy saving and speed regulation. In addition, the frequency converter also features comprehensive protection functions, excellent starting performance, simple and smooth speed regulation process, high automation, safety, and reliability. According to the actual needs of the motor, it provides the required power voltage, thus achieving energy saving and speed regulation. Furthermore, the frequency converter has many protection functions, such as overcurrent, overvoltage, and overload protection. With the continuous improvement of industrial automation, frequency converters have been widely applied.
The role of the frequency converter: Frequency conversion energy saving is mainly reflected in the application of fans and pumps. After adopting frequency conversion speed regulation for fan and pump loads, the power saving rate is 20% to 60%. When the required average flow is small, frequency conversion speed regulation reduces the speed of fans and pumps, resulting in very significant energy-saving effects. Traditional fans and pumps use dampers and valves for flow regulation, with the motor speed basically unchanged and little change in power consumption. According to statistics, the electricity consumption of fan and pump motors accounts for 31% of the national electricity consumption and 50% of industrial electricity consumption. Using frequency conversion speed regulation devices on such loads is of great significance. Currently, successful applications include constant pressure water supply, various fans, central air conditioning, and hydraulic pump frequency conversion speed regulation.  2. Application in automation systems   Since the frequency converter has a built-in 32-bit or 16-bit microprocessor, with various arithmetic logic operations and intelligent control functions, output frequency accuracy of 0.1% to 0.01%, and is equipped with comprehensive detection and protection links, it is widely used in automation systems. For example: winding, stretching, metering, and guiding in the chemical fiber industry; annealing furnaces for flat glass in the glass industry, glass kiln stirring, edge pulling machines, bottle making machines; automatic feeding and batching systems for electric arc furnaces, and intelligent control of elevators. Applications in improving process level and product quality include frequency converters in CNC machine tool control, automobile production lines, papermaking, and elevators.
3. Application in improving process level and product quality Frequency converters can also be widely used in various mechanical equipment control fields such as conveying, lifting, extrusion, and machine tools. They can improve process level and product quality, reduce equipment impact and noise, and extend equipment service life. After adopting frequency conversion speed regulation control, the mechanical system is simplified, operation and control become more convenient, and some can even change the original process specifications, thereby enhancing the function of the entire equipment. For example, in setting machines used in textiles and many other industries, the internal temperature is regulated by changing the amount of hot air delivered. Circulating fans are usually used to deliver hot air. Since the fan speed is constant, the amount of hot air delivered can only be adjusted by dampers. If the damper adjustment fails or is improper, the setting machine will be out of control, affecting product quality. High-speed starting of the circulating fan causes severe wear between the drive belt and bearings, making the drive belt a consumable item. After adopting frequency conversion speed regulation, temperature regulation can be achieved by automatically adjusting the fan speed with the frequency converter, solving product quality issues. In addition, the frequency converter can easily achieve low-frequency and low-speed starting of the fan, reduce wear between the drive belt and bearings, extend equipment service life, and save 40% of energy. 4. Achieving soft start of the motor Hard starting of the motor not only causes severe impact on the power grid but also requires excessively high grid capacity. The large current and vibration generated during starting cause great damage to dampers and valves, which is extremely detrimental to the service life of equipment and pipelines. After using the frequency converter, its soft start function will change the starting current from zero, with the maximum value not exceeding the rated current, reducing the impact on the power grid and the requirement for power supply capacity, extending the service life of equipment and valves, and also saving equipment maintenance costs.