With the rise of permanent magnet variable-frequency screw air compressor in the last two years, many customers are asking, what is the difference between permanent magnet variable-frequency screw air compressor and ordinary variable-frequency screw air compressor? Why is the price difference so much. Both of them are equipped with frequency converter, which is mainly different from the motor. The ordinary variable frequency screw air compressor is equipped with a traditional asynchronous excitation motor, and the permanent magnet variable frequency screw air compressor is equipped with a rare earth permanent magnet motor. The following is the difference between ordinary motor and permanent magnet motor. Permanent magnet variable frequency air compressor

High-efficiency permanent magnet synchronous motor Compared with induction motor, permanent magnet synchronous motor does not need reactive excitation current, can significantly improve the power factor (up to 1, or even capacitive), reduce the stator current and stator resistance loss, and there is no rotor copper loss during stable operation, which can reduce the fan (or even remove the fan for small-capacity motor) and the corresponding wind friction loss, The efficiency is 2~8 percentage points higher than that of induction motors of the same specification. Moreover, the permanent magnet synchronous motor can maintain high efficiency and power factor in the range of 25%~120% of rated load, which makes the energy-saving effect more obvious in light load operation. This type of motor is generally equipped with starting winding on the rotor, which has the ability to start directly at a certain frequency and voltage. At present, it is mainly used in oil fields, textile and chemical fiber industry, ceramic and glass industry, and fans, pumps, air compressors and other fields with long annual operation time.

Hannos permanent magnet variable frequency air compressor can automatically adjust the power frequency according to the size of the air consumption in the workshop, thus reducing the power consumption, and the motor efficiency does not decrease. The permanent magnet variable frequency screw air compressor saves more than 10% energy than the ordinary variable frequency screw air compressor, and saves more than 20% to 30% energy than the ordinary power frequency screw air compressor. The consultation hotline is 13809612360