Rare earth permanent magnet in the new energy sector play a major role

Rare known as " industrial gold" , with excellent physical properties of light and electromagnetic , other materials may be composed of different properties with a wide variety of new materials , especially in the rare earth permanent magnet motors, electrical appliances , rare earth with no the role may be substituted .

Recently, the Chinese Academy of Engineering, Chinese Academy of Sciences researcher PROCEEDINGS electrician in the "China Science News" reporter, said , rare earth permanent magnet in the new energy development can play an important role , but the current high price of rare earth rare earth permanent magnet industry has affected development .

Motor is an important industrial energy-consuming equipment , widely used in pumps, fans , compressors, transmission machinery and other fields , and its entire industrial electricity consumption accounts for about Chinese consumption more than 60% . For this reason, the "motor and system energy" had been included in the national "Eleventh Five-Year" ten key energy conservation projects, currently the Ministry and other departments are also vigorously promote efficient motor systems.

According PROCEEDINGS introduction of electrical energy at home and abroad for more than one direction of development, including two-speed induction motor , high efficiency high torque induction motor, brush or brushless doubly-fed motors, switched reluctance motor systems, etc. ; ( radial magnetic pass and axial flux ) , and mixed excitation ; motor VVVF control.

" Since 1998 , the domestic application of the permanent magnet made ​​important progress . " PROCEEDINGS further example, rare earth permanent magnet coreless diesel generators , energy efficient, light weight , high power, weight 54 kg each , the maximum power up to 3.0 kilowatts. " Prior to the earthquake relief in Lushan , Shenzhen, a special motor company produces coreless motor to set a great service . "

With wind, solar and other new energy sources rise began in these new rare earth permanent magnet energy generator is widely used . Electrical Engineering, Chinese Academy of Sciences , for example, from 2005 they started a large -capacity wind turbines of evaporative cooling . Combined rare earth permanent magnet technology and evaporative cooling techniques, they developed 3.6MW evaporative cooling magnet direct drive wind turbine has a half late 2011 manufactured , and in May 2012 began in Zhangbei State Grid Corporation of the test base for testing , the results meet the relevant standards.

PROCEEDINGS that rare earth permanent magnet motor has the advantage of high efficiency, low voltage ride through capability is good, you can play a major role in the new energy field , however , since the permanent magnet material prices increased significantly , resulting in the loss of a huge market , and its role nor fully play out .

"It was put into use permanent magnet generator can improve the operation of the wind farm , the promotion of new energy development , but its role has not been played , which is derived from the current single wind farm models affect the voltage stability , leading to the development of wind power situation in decline . " PROCEEDINGS said.

PROCEEDINGS said permanent magnet wind turbine industry is currently facing great difficulties, and wind generator is a permanent magnet material usage larger terminal products industries. Therefore, the development of permanent magnet wind generator stagnation will eventually affect the rare earth permanent magnet industry.

For the existing situation , PROCEEDINGS hope , rare earth upstream manufacturers should regulate prices reasonable and orderly manner in order to ensure the orderly development of the industry .


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