3.3 miniaturization
Since the maximum magnetic energy product of the NdFeB permanent magnet is high, in particular, an ultra-thin permanent magnet can be produced, thereby realizing an ultra-miniature and low-inertia motor which has been difficult to manufacture in the past. At present, ultra-small motors having a diameter of several millimeters or less have been developed as driving sources for medical micro-machines, robotic arms for eye surgery, and robots for pipe inspection. The world's smallest permanent magnet motor with an outer diameter of 0.8 mm and a length of 1.2 mm has been produced.
3.4 high functionality
It is difficult to use traditional motors in special occasions such as high temperature, high vacuum or narrow space, and rare earth permanent magnet motors can withstand high temperature (referring to samarium cobalt or high heat resistance NdFeB magnets), and they are small in size, which can meet these special requirements. . High-temperature motors and high-vacuum motors are required for motors operating in special environments such as robots in aerospace equipment, inspection robots for atomic energy equipment, and semiconductor manufacturing equipment. The three-phase four-pole permanent magnet motor has a diameter of 105mm and a length of 145mm, which is 150W, 3000r/min, and operates at a high temperature of 200oC to 300oC and a vacuum of 133.3X10Pa. The Sm2Co permanent magnet with high temperature characteristics is used.
4. Conclusion
In the 21st century, the rapid development of science and technology, the emergence of high-tech, energy-saving, environmental awareness, the future of permanent magnet synchronous motor development is bright, especially high-performance rare earth permanent magnet synchronous motor and its servo system, with its technology Rapid development and maturity, the structure will be increasingly diversified, and will also win a wider range of development space, and obtain a wider range of applications.
