Working pressure: 6~10bar
Exhaust volume: 0.4~13.6m³/min
Power: 11~75kw
Cooling method: air cooling/water cooling
How does the permanent magnet variable frequency screw machine save electricity?
a. High motor efficiency
For example, for a 22kw screw machine, the motor efficiency of an ordinary air compressor ranges from 88% to 90%. The efficiency of permanent magnet synchronous motor is above 94%. The same 22kw air compressor, the power consumption of the ordinary motor is 25kw to 24.4kw at full load, while the power consumption of the permanent magnet synchronous motor is 23.4kw. The permanent magnet motor can save 1 to 1.6kw of electricity in one hour.
b. When the speed is low, the efficiency is high; when the load is not full, the energy consumption is low
c. Constant output pressure, eliminating the extra 2bar pressure burden, saving 14% energy compared with industrial frequency air compressors.
Hande permanent magnet variable frequency screw machine saves 10%-15% energy than ordinary variable frequency screw machine, and saves 30%-40% energy than power frequency screw machine
Energy saving advantages of permanent magnet variable frequency screw machine:
■ High Efficiency: The loss of the excitation system is eliminated, and the efficiency is increased by 5-12%. The power factor is high, the moment-to-inertia ratio is large, the stator current and stator resistance loss are reduced, and the rotor parameters can be measured and the control performance is good. The motor is directly driven, no speed slip, no bearing and connection transmission, and the efficiency is increased by more than 3%. At light load, the efficiency of asynchronous motors of the same specification is improved by about 15-35%, and it always maintains high efficiency regardless of light load or heavy load. At present, the energy efficiency of permanent magnet motors used in Hande, Germany has reached the national level 1 energy efficiency standard.
■ It is still efficient when it is not fully loaded: the energy efficiency of permanent magnet motors is generally more than 9% higher than that of conventional asynchronous motors when running at full load. The magnitude is reduced, even down to below 50%.
■ Stable: The synchronous motor has a fast response speed and is excellent in exhaust responsiveness.
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