"Efficient motor efficiency promoted by developed countries has reached more than 91%, the efficiency of ultra-efficient motors in the United States is as high as 93%, and the operating efficiency of the system is 10-20% higher than that of China." Xu Dianguo said that at present, China's motor efficiency is lower than that of foreign countries. The percentage of high-efficiency motors used is only about 3%; the system efficiency is 10-20% lower than the foreign advanced level.
It is understood that China's motor system is widely used in metallurgy, petrochemical, chemical, coal, building materials, utilities, household appliances and other industries and fields. According to statistics, in 2011, China's motor ownership was about 1.7 billion kilowatts, and the total power consumption was about 3 trillion kWh, accounting for 64% of the total electricity consumption of the whole society. The total electricity consumption of the industrial sector was 2.6 trillion kilowatts. At the time, it accounts for 75% of industrial electricity.
At present, China's current production and in-use motors are mostly Class 3 energy efficiency below the standard, with an average efficiency of 87%. For every one percentage point increase in the energy efficiency of the industrial sector, the annual electricity consumption can be reduced by about 26 billion kWh. Through energy efficiency improvement, the efficiency of the motor system can be improved by 5-8 percentage points as a whole. The annual electricity saving can reach 13 to 230 billion kWh, which is equivalent to the power generation of 2-3 Three Gorges power stations.
In the past two years, due to the development of the national Huimin project, the total number of low-voltage high-efficiency motors and high-voltage high-efficiency motors such as YX3 has reached more than 10 million kilowatts, but it accounts for only a small proportion compared with the national storage motor of 1.7 billion kilowatts.
In 2008, the International Electrotechnical Commission (IEC) developed a globally uniform motor energy efficiency grading standard, namely IE1 standard efficiency, IE2 high efficiency, IE3, ultra-efficient, and IE4 ultra-high efficiency.
In the production process, the production of high-efficiency motors is encouraged, mainly in the three categories of high-efficiency motors that are included in the National Energy-Saving Products Huimin Project and the state provides financial subsidies. In the use of the link, the elimination of the use of low-efficiency motors, encourage efficient motor replacement, and encourage remanufacturing.
It is understood that the energy-saving products Huimin project plans to encourage production companies to produce high-efficiency motors. The high-efficiency motor refers to the three types of motors included in the National Energy-Saving Products Huimin Project, and the state provides financial subsidies: low-voltage high-efficiency three-phase asynchronous motors, high-voltage high-efficiency three-phase asynchronous motors, rare earth permanent magnet high-efficiency synchronous motors.
The market for efficiency transformation is huge
High efficiency means less energy loss in the process of converting from electrical energy to mechanical energy. Relevant experts believe that through the "old-for-new", various system energy-saving matching technologies can be used to implement efficient remanufacturing of the motor system.
The motor is remanufactured efficiently and the price of the product is lower. According to Xu Dianguo, the price is 20% lower than that of the newly-built motor. After Shanghai subsidy, some specifications are lower than the new motor price. And the efficient remanufacturing of the motor combined with the power matching and energy efficiency improvement of the load equipment system is better than the energy saving effect of the high efficiency motor directly. It can also solve the problem that there is a difference between the installation size of the imported motor or the old motor and the replacement of the motor. The replacement is difficult, and the original installation size is retained.
Rare earth permanent magnet motor is affirmed by the demand side
"The promotion of high-efficiency motors also requires technical policies and industry support." Xu Dianguo said that the phenomenon that used motors are re-used after being taken offline twice is very common. In developing countries, the number of secondary downlines can reach 5-6 times, it is still an inefficient motor, and it will be used for another 20 or 20 years.
Xu Dianguo introduced to the reporter "the permanent magnetization of low-efficiency induction motor", the permanent magnetization transformation is technically simple and feasible, and cheap and efficient to save environmental protection. China's rare earth resources are abundant, and the production of NdFeB is among the highest in the world. Through the permanent magnetization of the existing low-efficiency induction motor and the advanced high-efficiency control system, it is an effective way to improve the energy efficiency of the electromechanical system in China.
Compared with traditional motors, rare earth permanent magnet high-efficiency motors are characterized by high efficiency, energy saving, light weight and material, small size, good speed regulation and high reliability. It can be widely used in general equipment such as fans, pumps, compressors, etc. It can also be used in electric vehicles, wind power generation, CNC machine tools, oil field pumping units, mobile power stations and other fields.
Anhui Mingteng Permanent Magnet Electromechanical Equipment Co., Ltd. is a modern high-tech enterprise integrating R&D, manufacturing, sales and service of permanent magnet motor. It is mainly engaged in research and development of ultra-high-efficiency rare earth permanent magnet synchronous motor and related permanent magnet series products. It is one of the most complete and technologically advanced leading permanent magnet synchronous motor manufacturers from 380V-10kV. Among them, 6kV-10kV high-voltage ultra-high efficiency permanent magnet synchronous motor and explosion-proof ultra-high efficiency three-phase permanent magnet synchronous motor are the first in China. Up to now, the good operating effect of the rare earth permanent magnet high-efficiency motor produced by the company has been affirmed by many demanders.
The permanent magnet motor is operated by permanent magnets, the loss is reduced, the energy efficiency is improved, the energy saving is realized, the running current is reduced by more than 10%, the low-voltage motor system is saved by 5%-30%, and the high-voltage motor system is energy-saving 4%-15%. according to
It can be seen that improving the efficiency of the motor, reducing the energy consumption of the motor, developing and promoting the application of high-efficiency, ultra-efficient motors have important national energy strategic significance and realistic social benefits. Accelerating the promotion and application of high-efficiency and energy-saving motors is of great significance for the completion of the “12th Five-Year Plan” energy conservation and emission reduction tasks and the promotion of industrial structure adjustment and upgrading.