Variable frequency screw air compressors are made for energy saving. They are generally produced in two types: permanent magnet variable frequency and ordinary variable frequency. In the world of variable frequency air compressors, the most energy-saving one is the permanent magnet variable frequency screw air compressor. Energy saving is only a relative term, the purpose is to save money, so the meaning of "energy saving" of permanent magnet variable frequency screw air compressor is no longer single, it even includes later maintenance and repair costs, so now we will briefly talk about permanent magnet variable frequency screw air compressor How does a magnetic variable frequency screw air compressor save energy?
1. The advantage of the permanent magnet variable frequency air compressor is energy saving. It can generally save 10% to 35% of energy. The amount of energy saving depends on the working conditions of the air compressor and the parameter settings of the inverter. The important factor is the working condition of the air compressor. When the customer's gas consumption fluctuates greatly, the energy-saving effect will be better. The more direct data is the proportion of no-load time to the total working time. Therefore, in the process of selling variable frequency screw air compressors, we must first understand the customer's working conditions and obtain the following data:
The model of the machine; whether the working mode is ON/OFF control or MOD control; loading working time and total working time;
The working hours of the air compressor every day, how many days a week it works, and how many hours it works a year; the setting of the pressure band; if there is an electric energy meter, copy down the electricity consumption. What is the local electricity bill per kilowatt hour.
After knowing the above situations, you can roughly calculate how much money can be saved in a year by installing a permanent magnet variable frequency screw air compressor.
2. The maintenance cost of permanent magnet variable frequency air compressor is reduced.
Due to the adoption of an energy-saving control system, the software startup of the air compressor reduces the electrical impact on the electrical components of the motor, and the starting current is small, which prolongs the life of the motor's contactor. The software startup of the air compressor reduces the mechanical impact on the equipment, and the motor bearings, main engine bearings and gearbox all extend the service life. The energy-saving control device keeps the air compressor in a loaded state most of the time, and various related solenoid valves and pneumatic components reduce the number of actions, so the failure rate of both electrical and mechanical parts is greatly reduced. Covered the cost of replacement parts and labor.
In addition, the frequency converter control device keeps the air compressor in a loading state most of the time, and the air inlet filter is always in a forward filtering state. When unloaded, the air filter is in a reverse filtering state. The use of the frequency converter is greatly reduced. It shortens the reverse filtration time of the inlet filter and extends the service life of the filter element.
3. The permanent magnet variable frequency air compressor reduces the capacity of the factory’s power grid.
When using a screw air compressor to start, the starting current is still relatively large. When the factory power grid capacity is limited, it will cause the upstream air switch to trip. Therefore, using a variable frequency screw air compressor will reduce the capacity of the factory power grid.
4. Permanent magnet variable frequency air compressor reduces production losses
The permanent magnet variable frequency air compressor uses energy-saving equipment and monitors more than 20 parameters at the same time, including current, voltage, speed, torque, and power consumption. The system is highly intelligent. It makes the air system more stable and reliable, reduces downtime and reduces production losses.
5. Permanent magnet frequency conversion screw air compressor can reduce noise
When the exhaust volume is reduced, the rotation speed of the motor slows down, and the noise of the air compressor is much quieter than when running at full speed. The unloading operation time is reduced and the venting noise is also reduced.