How does frequency converter realize energy saving operation of air compressor?

Editor:浙江汇迅骏机电技术有限公司 │ Release Time:2021-09-17 

Domestic air compressor market is currently energy saving and environmental protection to reduce costs as the main demand, the development of new products are welcome. But economically, can not completely replace the use of large area, large capacity of the conventional screw air compressor.  Therefore, it will be more common to adopt frequency conversion technology for energy saving transformation of compressor. Therefore, it is very necessary to have a certain understanding and mastery of air compressor frequency converter.  Next with hui Xun Jun electromechanical together to understand it. 

Air compressor frequency converter is a special frequency converter for various types of compressors. Frequency converter is mainly used for speed regulation, because it can make the performance more stable, more convenient, energy saving and other advantages more and more widely used. 

In terms of energy saving: using frequency conversion speed regulation, when the gas consumption of the equipment is reduced, the speed of the motor can be reduced, the power of the motor can also be reduced, so as to meet the demand of energy saving. 


There is a power relationship between the speed of air compressor and the actual power consumption of air compressor, so to reduce the actual consumption of air compressor, it is necessary to reduce the speed of the motor.  The principles and results of energy conservation are as follows. 

—After the adoption of the frequency converter, the pressure setting of the air compressor can be adjusted slightly, that is, the pressure can meet the requirements of the production equipment. As a group of pressure, the frequency converter can adjust the speed of the compressor based on the network pressure fluctuation trend, and even eliminate the off-line operation of the air compressor to save electricity. 

— The system adopts frequency conversion device to stabilize the upper and lower pressure of the pipe network, which can reduce or even eliminate the fluctuation of pressure, so that all the compressors in the system can run under lower pressure, meet the production requirements, and reduce the power loss caused by pressure rise. 

— Because the air compressor can not exclude the possibility of running at full load for a long time, the capacity of the motor can only be determined according to the demand of the motor, so the design capacity is generally large.  In fact, light load operation takes up a large proportion of the time, if the use of frequency control, can greatly improve the efficiency of the operation. 

— Part of the adjustment mode is that the operating power of the motor cannot be reduced even in the case of small demand.  When the demand is small, frequency conversion speed regulation can reduce the speed of the motor, reduce the motor running power, so as to achieve the purpose of further energy saving. 

— Most single motor drive systems cannot be adjusted continuously according to load.  Using frequency conversion speed regulation, continuous adjustment is very convenient, can keep pressure, flow, temperature and other parameters stable, so as to greatly improve the performance of air compressor. 


From the point of view of the actual operating cost: the operating cost of variable frequency air compressor is much higher than the purchase cost. With the extension of the use time, the operating cost also increases. Therefore, in order to save the operation cost in the later stage, the application of air compressor frequency converter has become an imperative choice.