Applications, a large number of high-performance NdFeB permanent magnet material through the use of the motor to play a role, while the use of permanent magnet materials, the motor is often referred to as permanent magnet motor. Permanent magnet motor is divided into ferrite magnets and rare earth permanent magnet motor. Motor is a magnetic field as a medium for mechanical energy and electrical conversion of electromagnetic devices. There are two ways to establish the air gap magnetic field necessary for the electromechanical energy conversion in the motor. There are two ways to pass the current through the motor windings. Both the special windings and the corresponding devices are required, and the energy needs to be continuously supplied to maintain the current flow. Known as electric excitation motor, such as ordinary DC motor and synchronous motor; a permanent magnet to produce a magnetic field, both to simplify the motor structure, but also save energy, this is the permanent magnet motor. The application of permanent magnet motor is very widely distributed throughout the fields of aviation, spaceflight, national defense, equipment manufacturing, industrial and agricultural production and daily life: its capacity from large to small, has reached the MW, the scope of application is more and more widely; its position More and more important, from the military to civilian, from special to ordinary areas, not only in the micro motor dominance, but also in the electric propulsion system also showed a strong vitality.
Compared with the traditional electric excitation motor, rare earth permanent magnet motor has the advantages of simple structure, reliable operation, small size, light weight, small loss, high efficiency, flexible and diverse motor shape and size. Compared with the rare earth permanent magnet motor produced by using the traditional NdFeB permanent magnet material, the new rare earth permanent magnet motor using the high performance NdFeB permanent magnet motor has the advantages of smaller volume, lower loss and significantly higher efficiency than the conventional rare earth permanent magnet motor . Rare earth permanent magnet motor is an energy-efficient products, the average saving rate as high as 10%, the use of high-performance NdFeB permanent magnet permanent magnet motor energy-saving rate of up to 15% to 20%. In wind turbines, compressors and other occasions need Promise frequency control, permanent magnet frequency control speed saving rate as high as 30%. International advanced level of energy-saving motor is the fan operating efficiency is generally above 80%, the system operating efficiency of about 85%. At present, the ontology design efficiency of China-made equipment is 70%, the operating efficiency of the system is less than 30%, and the power waste is very serious. According to the IEA's July 2006 report, approximately 7% of the electrical energy can be saved by improving motor efficiency combined with VVVF, of which about one-fourth to one third are achieved by increasing motor efficiency. To coordinate energy efficiency standards across countries, in 2006, the International Electrotechnical Commission (IEC) established an energy efficiency standard, IEC60034-30. The standard will be divided into general-purpose motor efficiency levels IE1, IE2, IE3, IE4 four, IE1 standard efficiency, equivalent to China's current production of your ordinary series induction motor
Taken together, the use of high-performance NdFeB permanent magnet materials, rare earth permanent magnet motor easy to achieve high efficiency, IE2 level to achieve the value of efficiency. Rare-earth permanent magnet motor positive power (high speed, high torque), high-functional and miniaturization direction, expanding the new motor varieties and applications. At present, the main downstream industries of China's high-performance NdFeB permanent magnetic materials are divided into two categories, the traditional downstream industries, including VCM motors and personal consumer electronics products; new energy and energy saving and environmental protection industries, including energy-saving wind power generation equipment, energy-saving elevator drag Introduction machine manufacturing, energy saving air conditioners (inverter air conditioner), EPS and hybrid vehicles. It is worth noting that the current demand for high performance NdFeB permanent magnet materials for energy-saving air-conditioners and hybrid vehicles is mainly met through the purchase of high-performance NdFeB permanent magnet materials produced in Japan. At present, China has not yet selected the high Performance NdFeB permanent magnet materials. In the coming years, China's energy-saving wind power generation equipment industry, energy-saving elevator traction machine manufacturing industry, hybrid vehicles and EPS manufacturing industry will rapidly develop as the country pays more and more attention to new energy, energy conservation and emission reduction work, Demand for high-performance NdFeB permanent magnets will grow rapidly, while VCM motors and personal consumer electronics products will continue to experience steady and slow growth overall, and demand for high-performance NdFeB permanent magnets will remain stable.