Variable frequency control is a driving method to change the operating speed of compressor by changing the power supply frequency.
Frequency conversion air compressor than the general air compressor function and energy saving aspects to have advantages, mainly the following:
1, variable frequency air compressor pressure setting can so a little, that can meet the requirements of production equipment as the minimum pressure set pressure, variable frequency air compressor will be based on the pipe network pressure fluctuation trend, conditioning the speed of air compressor speed, and even eliminate the unloading operation of air compressor, save energy.
2. Since the compressor cannot eliminate the possibility of long-term operation under full load, the capacity of the motor can only be determined according to the maximum demand, so the planned capacity is generally large.In practice, the share of light running moments is very high.If choose frequency conversion speed regulation, can greatly improve the operating efficiency.Therefore, there is great potential for energy conservation.
3, some conditioning methods (such as adjusting valve opening and changing blade Angle, etc.), even in the case of small demand, can not reduce the motor running power.After the selection of frequency conversion speed regulation, when the demand is small, can reduce the motor speed, reduce the motor running power, and then further energy saving.
4, most single motor drive system can not be in accordance with the weight of the load in succession conditioning.And the selection of frequency control, can be very convenient to carry out conditioning, can insist on pressure, flow, temperature and other parameters of stability, and then greatly improve the compressor operation function.
Hande launched the frequency conversion series, including permanent magnet frequency conversion twin-screw air compressor, super permanent magnet frequency conversion twin-screw air compressor and low pressure permanent magnet frequency conversion twin-screw air compressor.Frequency conversion series has a common double-layer oil-cooled permanent magnet frequency conversion special motor, which USES smooth system of air compressor to circulate cooling the motor through oil passage, ensuring the low temperature operation of the motor within the full frequency range and avoiding high temperature degaussing of the system.When the amount of gas used is very small, perhaps not necessary, the system will go into hibernation.Achieve maximum energy saving,
In the dormancy, when the practical pressure reaches the dormancy and awakening pressure, the frequency converter responds at high speed and starts immediately.Can save more than 40% of energy consumption:
Save electricity example: a 75KW general air compressor, a year running 8000 hours, the electricity cost is 0.7 yuan/KWH, a year's electricity cost is 75KW* 8,000 *0.7= 420,000 yuan
Skoluo permanent magnet frequency conversion air compressor, a year can save about 40% of the electricity, then 420,000 yuan *40%= 168,000 yuan