2 harmonic electromagnetic noise and vibration ordinary asynchronous motor with inverter power supply, vibration and noise cause by the electromagnetic, mechanical, ventilation and other factors caused becomes more complicated. Frequency power supply is the AC mains through the AC → DC → AC conversion, pure sine wave output, output frequency and voltage within a certain range is adjustable. It is different for variable speed controller motor speed to use, but also from ordinary AC power supply. Ideal frequency AC power is characterized by stability, voltage stability, resistance to zero, the voltage waveform is a pure sine wave (no distortion). Very close to the ideal frequency AC power supply, and therefore oil-free compressor manufacturer, the advanced countries are increasingly used as a standard power supply frequency power to the electrical power supply to provide the best environment to facilitate the use of objective assessment technical performance of appliances. There are two major power inverter types: linear amplification type and SPWM switch type. Wherein the intrinsic spatial harmonics each time time harmonic electromagnetic motor section containing interfere with each other to form a variety of electromagnetic exciting force. When the natural frequency of the electromagnetic force wave frequency and the motor body of the same or close the screw air compressor manufacturer, will have a resonance phenomenon, thereby increasing the noise. Since the motor, wide frequency range compressor manufacturers supply a large speed range compressor manufacturers, all kinds of electromagnetic force wave frequency is difficult to avoid the natural vibration frequency of each member of the motor. 1, the air output temperature is too high (1) reduce the screw compressor air inlet temperature. Increase air compressor room ventilation in the room plus roof exhaust hood, to exclude heat, control room temperature is not too high. In summer, the air compressor room temperature should not exceed 40 ℃. (2) reduce the cooling water inlet temperature, the winter water temperature maintained at 18 ℃, summer water temperature maintained at 24 ℃. (3) increase the cooling water flow rate, the estimated temperature of the cooling water inlet and outlet temperature difference l5 ℃, cooling water flow rate of 3.7 liters / sec. (4) removal of the cooling water scale or dirty sediment. In the cooling water by adding detergent to clear the cooling water system. 2, screw compressor screw compressor oil high oil temperature protection settings, oil temperature exceeds 70 ℃, shut down, resulting in frequent compressor shutdown. The reason is the high oil temperature oil cooler failure. Since the cooling water circuit in the oil cooler is fine, easy to clean up after fouling, resulting in oil does not drop down. Replacing an oil cooler and too expensive. After the study explored by the following method to clean the cooler is better. Remove the oil cooler, soaked in detergent in one day, and then a small pump the water under pressure into the oil cooler repeated washing, the scale can be removed in summer to control the oil temperature below 60 ℃. 3, the air filter frequently fail to start using screw air compressor, the air filter on the failure of only one month. The analysis of ambient air is dirtier. To this end the top Canadian online air compressor air filter cover, extended filter life. 4, screw compressor screw compressor motor burn frequently during use, the main motor frequently burned over a period of time. The main reason is that no one thing has its maximum operating pressure, and exceeding the working pressure and long-running, long-term overload, it will cause the compressor motor overheating, burning motor. Air compressor manufacturers supply, Yang Mu compressor manufacturers, Qin Wei Qin Wei Xianyang provided by Air Compressor Co., Ltd.. Xianyang Qin Wei Compressor Co. (www.xykyj.cn/) strong, credible, Xianyang in Shaanxi compression, separation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Qinwei Air into the brilliant and you work for a better future!