The difference between variable frequency air compressor and ordinary air compressor
Release time:
2024-08-30
Compared with the upper and lower limit switch control of power frequency operation, the stability of air pressure is exponentially improved.
1. Stable air pressure: (1) Due to the variable frequency screw air compressor utilizing the stepless speed regulation characteristics of the frequency converter, it can start smoothly through the controller or PID regulator inside the frequency converter; It can quickly adjust and respond to situations with significant fluctuations in gas consumption; (2) Compared with the upper and lower limit switch control of power frequency operation, the stability of air pressure is exponentially improved.
2. Starting without impact: (1) Due to the fact that the frequency converter itself includes the function of a soft starter, the maximum starting current is within 1.2 times the rated current. Compared with power frequency starting, which is generally more than 6 times the rated current, the starting impact is very small. (2) This kind of impact is not only on the power grid, but also greatly reduces the impact on the entire mechanical system.
3. Variable flow control: (1) Power frequency driven air compressors can only operate at one displacement, while variable frequency air compressors can operate over a wide range of displacements. The frequency converter adjusts the motor speed according to the actual gas consumption to control the exhaust volume. (2) When the gas consumption is low, the air compressor can automatically sleep, greatly reducing energy loss.
4. The voltage adaptability of AC power supply is better: (1) The frequency converter adopts overmodulation technology, which can still output sufficient torque to drive the motor to work even when the AC power supply voltage is slightly lower; When the voltage is slightly higher, it will not cause the output voltage to the motor to be too high; (2) For self generating situations, variable frequency drive can better demonstrate its advantages; (3) According to the characteristics of the electric motor VF (the variable frequency air compressor operates below the rated voltage in energy-saving state), the effect is significant for sites with low grid voltage.
5. Low noise: Most operating conditions of the variable frequency system are below the rated speed, reducing the mechanical noise and wear of the host, and extending maintenance and service life.
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