Energy-saving advantages of permanent magnet frequency conversion screw machine:
■ High efficiency: eliminate the loss of excitation system, improve the efficiency by 5-12%. The power factor is high, the moment 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. Direct motor drive, no speed difference, no bearing and connection transmission, efficiency increased by more than 3%. Under light load, the efficiency of induction motor is increased by 15-35% compared with that of the same specification. Regardless of light load and heavy load, it always keeps high efficiency. At present, the energy efficiency of permanent magnet motor adopted by Germany Desland reaches the national level 1 energy efficiency standard.
■ Non-full load, still high efficiency: the energy efficiency of permanent magnet motor is more than 9% higher than that of conventional asynchronous motor at full load. With the reduction of speed, its energy efficiency basically remains unchanged, while the energy efficiency of asynchronous motor will be greatly reduced with the reduction of speed, even reduced to below 50%.
■ Stability: synchronous motor has fast response speed and excellent performance in exhaust responsiveness.
Permanent magnet frequency conversion screw machine technical parameters
