• 2024/11/26 15:21:36

Differences and features between variable frequency air compressor and fixed frequency air compressor

1. Variable frequency air compressor

Variable frequency air compressor controls the actual input power through the frequency converter to achieve energy saving. Its core advantage is that it can adjust the motor speed in real time according to the actual gas consumption and control the exhaust volume. In scenarios where the output pressure needs to be adjusted frequently, variable frequency air compressors perform well. Specifically, variable frequency air compressors have the following significant features:

• Significant energy saving effect: The variable frequency air compressor adopts variable frequency speed regulation. When the user's gas consumption is small, the output frequency can be reduced through the frequency converter to reduce the air compressor speed, thereby further achieving energy saving. The average energy saving effect can reach 30% or even more, and the additional cost of investing in variable frequency air compressors can be recovered in about 1 year.

• Stable gas pressure: The variable frequency machine uses the stepless speed change characteristics of the frequency converter to start smoothly through the internal controller or ID regulator. Even in the case of large gas fluctuations, the response can be adjusted quickly to stabilize the pressure in the pipeline network.

• Low noise and long life: The working conditions of the frequency conversion system are mostly lower than the rated speed, and the mechanical noise and wear of the main engine are reduced, thereby extending the service life of the equipment.

· Good voltage adaptability of the AC power supply: The overmodulation technology adopted by the frequency converter enables the AC power supply to output sufficient torque to drive the motor at low voltage. When the voltage is slightly higher, the output voltage will not be too high.

2. Fixed frequency air compressor

The fixed frequency air compressor is driven by a constant frequency AC power supply, and its operating power and exhaust volume are relatively fixed. In scenarios where the output pressure requirements are relatively stable, the fixed frequency air compressor performs stably and reliably. The main features of the fixed frequency air compressor include:

• Simple structure and easy maintenance: The fixed frequency air compressor has a relatively simple structure and low repair and maintenance costs.

• Stable operation: When the output pressure demand is stable, the fixed frequency air compressor can provide stable air pressure output.

• Low cost: Compared with the variable frequency air compressor, the initial investment cost of the fixed frequency air compressor is lower.