A frequency converter is an electrical energy control device that utilizes the on-off function of power semiconductor devices to convert power frequency sources into another frequency. High voltage and high-power variable frequency speed regulation devices are widely used in various industries such as large-scale mining production plants, petrochemicals, municipal water supply, metallurgy and steel, power energy, etc., including fans, water pumps, compressors, steel rolling mills, etc.
1. Oil and gas drilling and production industry: Frequency converters are used in the oil mining industry, primarily for motors of load types such as oil extraction machines (percussion machines), water injection pumps, submersible pumps, oil transfer pumps, gas compressors, etc., with the aim of energy conservation for motors.
2. Metallurgical industry: The application of high-voltage frequency converters in the metallurgical profession mainly includes rolling mills, coiling machines, fans, slurry pumps, etc. for sheet and wire, with the primary intention of energy conservation for motors.
3. Power industry: The power industry is also an important application area for frequency converter products. Frequency converter products are primarily used to modify coal, powder, water, etc., in order to adapt to changes in load and ultimately achieve the intention of saving power and improving control technology. They are of great significance for energy conservation, consumption reduction, emission reduction, safety, and stable operation of thermal power plants.
4. Water supply: water supply and drainage system, sewage treatment system, etc. in shared projects. These devices are primarily wind turbines, water pumps, and motor loads. The energy-saving effect of using high-voltage frequency converters is very outstanding, usually achieving a power saving of about 30%.
5. Petrochemical industry: The petrochemical industry is the artery of national economic development. Frequency converters are primarily used in various pumps, compressors, and shared projects in petroleum processing (refining) to achieve energy-saving and process control capabilities.
6. Building materials industry: The building materials industry is an important information industry in China, and its products include three categories: building materials and products, non-metallic minerals and products, and inorganic non-metallic new materials. The products of frequency converters are mainly used in equipment such as blowers, crushers, belt conveyors, exhaust fans, rotary kilns, etc. in the building materials industry.
7. Coal industry: The use of variable frequency speed regulation skills in mine hoists for the coal industry can have a good energy-saving effect. Currently, developed countries have widely used frequency converters for speed regulation of belt conveyors, starting control of belt conveyors, fan speed regulation (including main ventilation fans and some ventilation fans), and water pump speed regulation. In addition to improving the transmission function, the most important thing for equipping the motor with a frequency converter in the above equipment is to save power.