It does not need to know the position information of the rotor, and an open-loop control scheme with a constant voltage-frequency ratio is often used. The self-controlled permanent magnet synchronous motor also adjusts the rotor speed by changing the frequency of the external power supply.
Permanent magnet frequency conversion air compressor has become a hot spot and bright spot in the industry because of their energy-saving and high efficiency. Gradually replace the original air compressor with large power consumption with a permanent magnet variable frequency air compressor, which can directly save users 20%-40% of the cost!
Rare earth permanent magnet motor is a new type of permanent magnet motor that appeared in the early 1970s.
On the eve of China's National Day, the villagers of Changkou Village, Gaotang Town, Jiangle County received the profit from the first sale of "air" - a forestry carbon ticket dividend of 140,000 yuan.
As a new type of high-efficiency energy-saving product, permanent magnet synchronous motor has been widely recognized and developed rapidly.
The permanent magnet synchronous motor is more suitable for loads with frequent load changes, and the motor often runs in no-load or light-load state, such as lathes, punches, chemical fiber, textile, wire drawing equipment, and its final energy-saving effect is more obvious , the average power saving rate can reach more than 10%.
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