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Rare earth permanent magnets in the air oxygen generation system, the electric braking systems used in the fuel oil system

by:Newland     2020-04-17
Rare earth permanent magnets in the air of oxygen generation system, brake system, fuel system using air oxygen generation system: oxygen concentrator is an important airborne equipment of advanced aircraft, it provides the pilot with the life of life. At present, the international only four countries such as America has the technology. Our country has been among the international advanced level, the technology successfully developed oxygen concentrator. Motor used for low speed high accuracy steady speed brushless dc motor system, by samarium cobalt permanent magnet excitation, drive valve 6 r/min to rotate. Electric braking system: the United States in 1982 successfully developed the electric braking system, and in A - 10 tested on board. In 90 completed the third DaiDian brake system, adopted the big moment of samarium cobalt permanent magnet brushless dc motor and worm wheel actuators. F - 98, the United States 16 fighter flight test new electric braking system. The system of electric actuator using four rare earth permanent magnet brushless dc motor. Due to using brushless motor and low inertia components, electromechanical actuator response frequency of 20 ~ 30 Hz, and the frequency response of hydraulic actuator is only 10 Hz. Using the electric braking system can make the fighter lighten 22. 5 ~ 45公斤。 Fuel system: the system of hydraulic pump, hydraulic valve USES mostly in the past have a brush dc motor driver. We use brushless dc motor. Motor with pump in the fuel oil works, installation, controller and motor ontology with shell completely sealed. Motor adopts high temperature resistant nd-fe-b or samarium cobalt permanent magnet, and 1 j22 high permeability stator core material, with functions of digital control of speed closed loop and soft start. Process knowledge: ndfeb magnets can be divided into two kinds of bonded ndfeb and sintered ndfeb. Bond is, in fact, injection molding, and sintering is by vacuum heating forming! As the third generation of rare earth permanent magnet, ndfeb magnet with high performance, its wide application in energy, transportation, machinery, medical, IT, home appliances and other industries, especially with the development of information technology represented by knowledge economy, to functional materials such as rare earth permanent magnet ndfeb industry constantly bring new USES, IT brings a more broad market prospect for ndfeb industry. Ndfeb magnet is made of neodymium, iron, boron tetragonal crystal system crystal. In 1982, sumitomo special metals sagawa real find neodymium magnets. The magnet magnetic energy product is greater than the samarium cobalt magnet, is one of the largest material then magnetic energy product all over the world. Later, sumitomo special metals development success of powder metallurgy method, general motors development successful rotary spray melting method, to the preparation of ndfeb magnet. This is today's strongest permanent magnet magnetic magnet, which is the most commonly used rare earth magnet. Magnet, powerful magnets, special-shaped magnets, magnet manufacturer,
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