The difference between permanent magnet frequency conversion and power frequency of spiral air compressor

There are some significant differences between the permanent magnet frequency conversion and the power frequency version of the screw air compressor. Here are their main differences:

working principle:

permanent magnet variable frequency air compressor: permanent magnet synchronous motor is used to control the speed of the motor through the frequency converter, so as to realize the stepless speed regulation of the air compressor. When the air consumption changes, the air compressor can automatically adjust the speed of the motor to match the actual demand, so as to achieve the effect of energy saving.

Power frequency air compressor: The traditional asynchronous motor is used, and the motor speed is fixed (usually 50Hz or 60Hz) and cannot be adjusted according to actual needs. When the air consumption is reduced, the air compressor adjusts the output pressure by loading and unloading, which will lead to energy waste and pressure fluctuation.

Energy performance:

since the permanent magnet variable frequency air compressor can adjust the motor speed according to the actual demand, it has higher energy efficiency at partial load. In contrast, industrial air compressors are less efficient at partial load because they cannot adjust the motor speed to match the actual demand.

Noise and vibration:

permanent magnet variable frequency air compressors usually run more smoothly and have lower noise and vibration levels. The power frequency air compressor may produce higher noise and vibration under certain working conditions due to the fixed motor speed.

Initial investment and maintenance:

the initial investment of permanent magnet variable frequency air compressors is usually higher because they use more advanced permanent magnet synchronous motors and frequency converters. However, in long-term use, energy costs can be saved due to its energy-saving characteristics. The initial investment of the power frequency air compressor is low, but the long-term operating cost may be high.

Scope of application:

permanent magnet variable frequency air compressor is suitable for occasions with large fluctuations in gas consumption, such as production lines, hospitals, etc. The power frequency air compressor is more suitable for occasions where the gas consumption is relatively stable.

Regarding the water-lubricated oil-free frequency conversion screw air compressor of Shanghai Granklin Group, it is an air compressor that combines water lubrication technology and permanent magnet frequency conversion technology. This air compressor not only has the characteristics of oil-free output, but also can automatically adjust the motor speed according to actual needs to achieve high efficiency and energy saving. Its power range from 7.5KW to 250KW, suitable for a variety of industrial applications. Do you have any questions or need further information about this air compressor?