At present in China, the screw compressor frequency conversion technology of the beginning of many advanced countries in the world to a lot later.The main reason is that people have a very simple understanding of frequency conversion technology, when we only focus on the screw air compressor production efficiency, developed countries have put the screw air compressor technology development target to the development of energy saving technology.This leads to the screw compressor frequency conversion technology is not widely used.China's current frequency conversion technology is still in the stage of popularization.However, frequency conversion technology is widely used in many advanced countries, because they produce ac contactors with the function of frequency conversion.Low-voltage motors can apply frequency conversion technology from 0.75kw to 800KW, so in this technology, they can achieve more reasonable control of the motor load output, and ultimately achieve the purpose of energy saving.
On the other hand, the application of frequency conversion technology on high-voltage equipment is less. The main reason is that high-voltage equipment has large power and high voltage, which requires special transformers and frequency converters. Moreover, the voltage resistance level of frequency converters should meet the requirements of high-voltage equipment, and the cost is very high, which is not conducive to widespread promotion and application.Second, most high-voltage equipment adopts reactive power compensation method to improve the power factor of the equipment, so foreign high-voltage equipment does not use frequency conversion technology.So on the use of frequency conversion technology, our country and Europe and the United States and other countries there is a certain gap, after frequency conversion technology in China should be the development direction of trend in the development of frequency conversion technology merged with other technology, makes the realization of the function of frequency conversion is no longer a need to separate to realize frequency conversion equipment, eventually achieve the result of a machine a variety of functions, in order to save cost and improve the efficiency of the air compressor's ultimate goal.
