BMVF Permanent Magnet VSD Screw Air Compressor | Class 1 Energy Saving Industrial Compressor

The Difference Between Variable Frequency Screw Air Compressors and Fixed Frequency Screw Air Compressors

Even the most energy-efficient fixed frequency screw air compressors will experience varying degrees of efficiency reduction when deviating from their rated operating conditions, ultimately leading to lower overall efficiency. BOREAS permanent magnet variable frequency technology, however, adjusts the motor speed according to changes in air consumption, thereby controlling the discharge volume and ensuring high efficiency under any air consumption conditions. Therefore, compared to ordinary fixed frequency screw air compressors, permanent magnet variable frequency screw air compressors have a significant energy-saving advantage when system air consumption fluctuates; the greater the fluctuation, the more pronounced the energy-saving effect, with an overall energy saving rate of up to 50%.

The Difference Between Permanent Magnet Variable Frequency Screw Air Compressors and External Variable Frequency Screw Air Compressors

Ordinary screw air compressors use an external frequency converter (VFD) to adjust the motor speed, thereby regulating the discharge volume to match air consumption and achieve energy savings. However, the motors used in ordinary screw air compressors have rated speed, rated power, and rated efficiency. An external frequency converter forces the compressor motor to deviate from its rated speed. Once an ordinary motor deviates from its rated speed, its efficiency drops significantly; the greater the deviation, the more severe the efficiency drop. In contrast, permanent magnet variable frequency screw air compressors using permanent magnet variable frequency motors maintain extremely high motor efficiency at any speed, thus resulting in significant energy savings compared to ordinary screw air compressors equipped with external frequency converters. Furthermore, the adjustment range of ordinary screw air compressors equipped with external frequency converters is 40%~100%. This means that when the motor speed deviates from the operating condition by more than 60%, the external frequency converter will be unable to adjust the motor speed. In contrast, the adjustment range of BOREAS permanent magnet variable frequency screw air compressors is 15%~100%. This means that the BOREAS permanent magnet variable frequency screw air compressor can still work normally when it deviates from the operating conditions by 85%.

The Difference Between Permanent Magnet Variable Frequency Screw Air Compressors and External Variable Frequency Screw Air Compressors

Ordinary screw air compressors use an external frequency converter (VFD) to adjust the motor speed, thereby regulating the discharge volume to match air consumption and achieve energy savings. However, the motors used in ordinary screw air compressors have rated speed, rated power, and rated efficiency. An external frequency converter forces the compressor motor to deviate from its rated speed. Once an ordinary motor deviates from its rated speed, its efficiency drops significantly; the greater the deviation, the more severe the efficiency drop. In contrast, permanent magnet variable frequency screw air compressors using permanent magnet variable frequency motors maintain extremely high motor efficiency at any speed, thus resulting in significant energy savings compared to ordinary screw air compressors equipped with external frequency converters. Furthermore, the adjustment range of ordinary screw air compressors equipped with external frequency converters is 40%~100%. This means that when the motor speed deviates from the operating condition by more than 60%, the external frequency converter will be unable to adjust the motor speed. In contrast, the adjustment range of BOREAS permanent magnet variable frequency screw air compressors is 15%~100%. This means that the BOREAS permanent magnet variable frequency screw air compressor can still work normally when it deviates from the operating conditions by 85%.