Oil-free air compressor is better to choose power frequency air compressor or variable frequency air compressor

How to choose between "power frequency air compressor" and "variable frequency air compressor?

When you need "oil-free air compressor" to provide "oil-free air" for enterprise production, you will fall into a difficult problem of choice. So many types and brands of "oil-free air compressor" are dazzling.

We can look at the difference between "power frequency air compressor" and "frequency conversion air compressor" to decide how to choose and purchase. If you need "water lubricated air compressor" or "oil free air compressor" may wish to contact us "Shanghai granklin group".

1. pressure stability:

the variable frequency screw air compressor uses the stepless speed regulation characteristics of the frequency converter, and can start smoothly through the controller or the PID regulator inside the frequency converter. For occasions with large fluctuations in gas consumption, it can quickly adjust the response;

2. start without impact:

the inverter itself contains the function of a soft starter. The maximum starting current is within 1.2 times of the rated current, while the power frequency starting is generally more than 6 times of the rated current, and the starting impact is very small. This impact is not only on the power grid, but also on the entire mechanical system.

3. variable flow control:

the frequency converter is based on the actual gas consumption to adjust the motor speed in real time to control the displacement. Therefore, the variable frequency air compressor can work in a relatively wide range of exhaust volume.

4. AC power supply voltage adaptability is better:

1. Due to the over-modulation technology adopted by the frequency converter, sufficient torque can still be output when the AC power supply voltage is slightly lower to drive the motor to work; when the voltage is slightly higher, it will not cause the voltage output to the motor to be on the high side;

2. For self-generating occasions, variable frequency drive can show its advantages;

3. According to the characteristics of the motor VF (the variable frequency air compressor works below the rated voltage in the energy-saving state), the effect is obvious for the field with low grid voltage.

Low 5. noise:

most of the working conditions of the frequency conversion system are lower than the rated speed, the main machine mechanical noise and wear are reduced, and the maintenance and service life are extended;