2026-04-10Views：
What is the difference between power frequency screw air compressor and permanent magnet variable frequency screw air compressor?
In general screw air compressors, the number of revolutions of the rotor with power frequency is as much as it is. The frequency conversion air compressor can adjust the number of revolutions according to the required air volume. The empty load rate is greatly reduced, saving energy and electricity.
The permanent magnet has no motor bearing, its power transmission is simpler and the loss is lower, so it saves about ~ 7% energy than the ordinary frequency converter. Price permanent magnet frequency conversion> frequency conversion> power frequency.
1) Life is different.
From the perspective of the service life of the machine, the permanent magnet variable frequency screw air compressor is better. Due to the use of inverter drive, therefore, the air compressor in the start, the use of "soft start", for the motor has a certain protective effect, reduce the possibility of burning the motor.
2. The parts are different.
From the perspective of parts, the permanent magnet variable frequency air compressor adopts high-efficiency rare earth permanent magnet motor and frequency converter. These two components are of great help to the energy saving of air compressor.
3, maintenance costs are different.
From the perspective of maintenance cost, the permanent magnet motor does not need bearings, does not need to add grease, eliminates the point of failure and reduces maintenance costs.
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extended information:
maintenance
1, daily check the oil level, exhaust temperature and exhaust pressure, check whether there is abnormal sound;
2. Open the drain valve of the separator to discharge condensate before starting up every week, check whether there is leakage everywhere, check the safety valve, and check the belt wear (visual inspection);
3. Regularly check the intake control valve, minimum pressure valve, electric control box connection terminal, safety valve and cooling fan;
4, regular cleaning, cleaning the cooler, test the reliability of the safety valve;
5. Regularly replace the oil filter element, oil separator element, air intake filter element and lubricating oil.
Reference source: Baidu Encyclopedia-Screw Air Compressor
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