We found that the speed of the air compressor motor has a square relationship with the actual power consumption of the air compressor, so if you want to reduce the actual consumption of the air compressor, you need to reduce the speed of the motor. The use of the inverter in the air compressor system is precisely to make the air compressor system through the precise coordination of electrical control and variable frequency control, and control it immediately without changing the torque of the air compressor motor (that is, the ability to drag the load). The motor speed (that is, output power) responds to changes in system pressure by changing the compressor speed, and maintains a stable system pressure (set value) to achieve on-demand output of high-quality compressed air. When the air consumption of the system is reduced, the compressed air provided by the compressor is larger than the system consumption at this time. The compressor will reduce the speed and reduce the output of the compressed air; . The role of the inverter in its system is the same as that of the fan motor water pump to save power, and according to the load change, control the input voltage frequency.
The principle and effect of energy saving are as follows:
1. After using the inverter, the pressure setting of the air compressor can be one point, that is, the minimum pressure that meets the requirements of the production equipment can be used as the set pressure. The inverter will adjust the speed of the air compressor according to the tendency of the pressure fluctuation of the pipe network The speed even eliminates the unloading operation of the air compressor and saves electricity.
2. As the inverter in the system stabilizes the pressure on the pipeline, it can reduce or even eliminate the pressure fluctuations, so that all the air compressors running in the system are operated at a lower pressure that meets the production requirements, reducing the pressure Power loss caused by upward fluctuations.
3, because the air compressor can not rule out the possibility of long-term operation under full load, so the capacity of the motor can only be determined according to the maximum demand, so the design capacity is generally large. In actual operation, the proportion of the time of light load operation is very high. If frequency conversion speed regulation is adopted, the working efficiency during operation can be greatly improved. Therefore, the inverter has great potential for energy saving in the air compressor system.
4.Some adjustment methods (such as adjusting the valve opening and changing the blade angle, etc.) cannot reduce the operating power of the motor even when the demand is small. After the frequency conversion speed regulation is adopted, when the demand is small, the speed of the motor can be reduced and the operating power of the motor can be reduced, thereby further achieving energy saving.
5. Most single-motor drag systems cannot be continuously adjusted according to the load. After the frequency conversion speed regulation is adopted, continuous adjustment can be very convenient, and the parameters such as pressure, flow rate and temperature can be kept stable, thereby greatly improving the working performance of the compressor.
