The motor system is closely related to the development of strategic emerging industries. The development of high-efficiency and energy-saving motors and dragging equipment is one of the important contents of the energy-saving and environmental protection industry. Motor and system technology research and product development should be combined with the development needs of China's strategic emerging industries to solve the problem of motor design and manufacturing through new product development in key areas such as energy conservation, environmental protection, high-end equipment manufacturing, new energy, and new energy vehicles. Key technical problems in testing, application, etc., thus promoting the advancement of motor technology and the development of the motor industry. The following small series introduces the development of various high-efficiency and energy-saving motors in China.
Ultra-high speed three-phase permanent magnet synchronous motor
(1) The necessity of developing ultra-high-speed three-phase permanent magnet synchronous motor: fill the domestic gap, lead the technological progress of the motor industry; promote the localization of high-end equipment manufacturing, improve the level of China's high-end equipment manufacturing industry; promote the supporting materials of the motor (silicon steel sheet, The development of industries such as electromagnetic wire, insulation, power electronics (magnetic suspension bearings, frequency conversion controllers); the promotion and application of large-capacity and ultra-high-speed motors have significant energy-saving and emission-reducing benefits.
(2) Product development stage Objective: Firstly develop ultra-high-speed three-phase permanent magnet synchronous motor for the application of centrifugal compressor in refrigeration and gas transportation, with a power range of 10 to 300 kW and a speed range of 1000 to 50000 r/min. . The design, manufacturing and testing technology of ultra-high-speed motors will be extended to the fields of machine tool spindle motors, micro-combustion power generation, and high-speed energy storage.
Low speed large torque permanent magnet synchronous motor
Low speed and high torque generally refer to the transmission system with speed <500r/min and rated output torque >500N·m. Such transmission systems are common in many industrial transmission applications (eg, ball mill drive systems are typical low-speed, high-torque transmission systems), as well as oilfield machinery, mining machinery, and plastics machinery.
At present, such equipment still uses the traditional motor acceleration and reducer drive mode, which reduces the overall transmission efficiency of the system due to mechanical reasons such as reducer gears. The permanent magnet motor can realize low speed and large torque direct drive operation. This characteristic makes the application of permanent magnet motor in the low speed and high torque transmission system very broad. The low-speed high-torque permanent magnet motor is applied to the ball mill to remove the large gears of the reducer, the direct drive pinion and the transmission part, so that the ball mill can operate reliably and the system can save more than 10%.
The stage objectives of product development are as follows:
(1) Complete the development of a dedicated motor for the ball mill. The motor power range is 2.2 to 400 kW, and the speed range is 10 to 60 r/min.
(2) Development of low-speed large-torque permanent magnet synchronous motors dedicated to equipment such as hoists, belt conveyors, screw pumps, and pumping units.
(3) Formulate product standards for low-speed large-torque permanent magnet synchronous motors dedicated to equipment such as ball mills.
