Air compressor is not necessarily frequency conversion. Air compressors are divided into two types: fixed frequency and variable frequency, each of which has different characteristics and application scenarios.
fixed frequency air compressor
- working principle: The fixed-frequency air compressor uses a fixed power frequency to convert electrical energy into mechanical energy to drive the compressor barrel to complete the compression of air.
- Features: There is no direct relationship between the power of the fixed-frequency air compressor and the load. If it runs under the condition of a small load, it will cause the problem of waste of energy consumption. In addition, since the air flow of the fixed-frequency air compressor is constant during operation, the loss of vulnerable parts such as air filters, oil filters, and oil separators is large, and regular replacement and maintenance are required.
- Price: fixed frequency air compressor price is relatively cheap.
Variable frequency air compressor
working principle: The variable frequency air compressor uses the frequency converter to change the speed and frequency of the motor, and then realizes the precise control of the output pressure of the air compressor. This design enables the variable frequency air compressor to adjust the working state according to the actual demand and avoid unnecessary energy waste.
Features:
- energy saving and consumption reduction: The frequency converter can adjust the motor speed according to the change of air demand, so as to achieve energy saving and consumption reduction. Compared with fixed frequency air compressor, variable frequency air compressor can save energy consumption by more than 30%.
- Smooth operation: The screw air compressor with frequency conversion control has better load characteristics and stronger adaptability. When the load changes, the frequency converter can realize accurate speed control, timely adjust the output power of the machine, and avoid the waste of energy consumption caused by the instantaneous start and stop of the machine.
- Extend equipment life: The frequency converter can reduce the mechanical wear and thermal load of the equipment by controlling the speed of the motor, thereby extending the service life of the equipment.
- Reduce site occupancy: After some local optimization of the power supply and pipeline, the screw air compressor under the control of the inverter can achieve a smaller volume, simpler configuration, and reduce site occupation.
Price: The performance and power of the variable frequency air compressor are higher, so the price is relatively high.
Select Recommendations
when choosing an air compressor, users should consider comprehensively according to their own work needs and budget. If the production environment requires high air pressure stability, or requires long-term continuous operation, and the budget allows, then the variable frequency air compressor may be a better choice. If the production environment does not require high pressure stability, or the budget is limited, then the fixed frequency air compressor is also a feasible choice.
