Frequency conversion air compressor has more advantages than industrial frequency air compressor
2022-11-15
Frequency conversion air compressor has more advantages than industrial frequency air compressor
1. Stable air pressure
Since the variable-frequency screw air compressor utilizes the stepless speed regulation characteristics of the frequency converter, it can be started smoothly through the controller or the PID regulator inside the frequency converter; it can be quickly adjusted for occasions with large fluctuations in air consumption response.
Compared with the upper and lower limit switch control of power frequency operation, the air pressure stability is improved exponentially.
2. Start without impact
Since the frequency converter itself has the function of a soft starter, the maximum starting current is within 1.2 times of the rated current. Compared with power frequency starting, which is generally more than 6 times of the rated current, the starting impact is very small.
This kind of impact is not only on the power grid, but also on the entire mechanical system, which is also greatly reduced.
3. Variable flow control
The air compressor driven by power frequency can only work in one displacement, and the variable frequency air compressor can work in a wider range of displacement. The frequency converter adjusts the motor speed in real time according to the actual gas consumption to control the exhaust volume.
When the air consumption is low, the air compressor can be automatically dormant, which greatly reduces energy loss.
The optimized control strategy can further improve the energy saving effect.
4. The voltage adaptability of the AC power supply is better
Due to the overmodulation technology adopted by the frequency converter, it can still output enough torque to drive the motor when the AC power voltage is slightly low, and it will not cause the output voltage to the motor to be too high when the voltage is slightly high.
For self-generating occasions, the variable frequency drive can show its advantages.
According to the characteristics of the VF of the motor (the frequency conversion air compressor works under the rated voltage in the energy-saving state), the effect is obvious for the site with low grid voltage.
5. Low noise
Most of the working conditions of the frequency conversion system work at lower than the rated speed, the mechanical noise and wear of the main engine are reduced, and the maintenance and service life are extended.
If the fan is also driven by frequency conversion, it can significantly reduce the noise of the air compressor when it is working.
