A brief analysis of the advantages of variable fre

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A brief analysis of the advantages of variable-frequency fans

simply speaking, variable-frequency fans use variable-frequency control technology to control the variable-speed operation of fans according to conditions. At present, the technology of variable frequency fan has been very mature, and has been widely used in various fields. It is a popular model of fan manufacturers

first, it is reflected in the principle of power saving. For any production machinery that uses AC induction motor as the power transmission mode, the power of the motor is selected according to the rated load during the maximum load period. Most of them cannot run at full load when working. The motor operates at full voltage and speed with a small load, and there will be a lot of time for no-load operation. Now the method of detecting the size of the load is adopted. According to the reduction of the load, appropriately reducing the stator voltage can improve the efficiency, because when the load is light and no-load, the active component of the stator current is very small, but mainly the excitation reactive current. Even for many machines with constant speed, such as piston air compressors in PP plastic parts, changing the load with speed regulation has obvious energy-saving effect. This is because after speed reduction (such as frequency conversion speed regulation), various losses of motors and production machinery decrease with speed and wind speed, and the efficiency is much higher than that of mechanical methods. Soft starting energy saving usually adopts the method of directly connecting the induction motor to the electric starting. The starting current of the motor is 5~7 times of the rated time, which not only has large loss, but also has great impact on the electricity, mechanical wear and vibration. If the variable-frequency speed regulation is used for starting, the starting current can be limited to a small amount. If the motor is started at full load, it can be as long as it is slightly larger than the rated current. In this way, the starting loss is greatly reduced, and there is no impact on the electricity and machinery. Therefore, many large-scale enterprises can add many new equipment without capacity expansion after the frequency conversion and speed regulation transformation of medium and large capacity equipment

second, it is reflected in the scope of application. 7. Displacement indication error of the product: ≤ ± 0.5% of the indication; It is widely used in industries, heating boilers, cement plants, kilns, coal mines, oil should be replaced to check whether the circuit board is damp or greasy fields, petrochemical plants, converters, blast furnaces in metallurgical industries, pharmaceutical plants, fertilizer plants, sewage treatment plants, textile machinery, water supply companies, air compressors, central air conditioning and other industries, enterprises and occasions, such as centrifugal fans, centrifugal pumps, axial fans, roots fans, circulating pumps, submersible pumps Frequency conversion speed regulation and flow, flow rate and pressure regulation control of oil pump, air compressor, high-pressure water injection pump and other equipment. The frequency conversion fan used in the gas furnace adopts the frequency conversion control technology to control the fan to operate at variable speed according to the conditions. Since the fan operates with frequency conversion, the power consumption is reduced and the energy saving effect is obvious. More importantly, the frequency conversion fan solves the problem of incomplete combustion of natural gas and saves natural gas

information comes. They plan to place 60 huge floating dustpan sources: Baifang

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