Permanent magnet motor to improve energy efficiency

- Oct 31, 2017 -

From a global perspective, the global total annual electricity consumption of 50%, industrial electricity consumption of 60% -70% are consumed in the motor system, the motor system to optimize the design, can save the equivalent of the country's industrial electricity consumption 9% -13% of the electricity. Industrial energy efficiency in the field of space is huge.

Energy - saving space Three Three Gorges power station

At present, the developed countries to implement the efficient motor efficiency has reached more than 91%, the United States ultra-efficient motor efficiency as high as 93%, the system operating efficiency than our high 10 to 20%. China's motor efficiency is 3-5 times lower than the average of foreign, with the use of efficient motor only about 3%; system efficiency than the advanced level of foreign low 10-20 percentage points.

It is understood that China's motor system is widely used in metallurgy, petrochemical, chemical, coal, building materials, public facilities, household appliances and other industries and fields. According to statistics, in 2011 China's motor ownership of about 1.7 billion kilowatts, the total power consumption of about 3 trillion kwh, accounting for 64% of the total electricity consumption, of which the total industrial power consumption of 2.6 trillion kilowatts , Accounting for 75% of industrial electricity.

In accordance with GB18613-2012 standard, China's current production and use of motor and more for the standard than the three energy efficiency, the average efficiency of 87%. Industrial energy efficiency for each increase of one percentage point, can save about 26 billion kwh of electricity. Through the energy efficiency improvement, can improve the overall motor system efficiency of 5-8 percentage points. Year can achieve energy saving 1300-2300 billion kwh, the equivalent of 2-3 Three Gorges power generation capacity.

In the past two years, due to the development of national Huimin project, YX3 and other low-voltage high-efficiency motor and high-pressure high-speed motor to promote the total has reached more than 1000 million kilowatts, but with the national stock of 17 billion kilowatts compared to only a small proportion. Efficiency transformation space is huge.

In 2008, the International Electrotechnical Commission (IEC) developed a unified global energy efficiency grading standards, namely IE1 standard efficiency, IE2 high efficiency, IE3, ultra efficient, IE4 ultra-efficient.

In 2002, China issued a small and medium-sized three-phase induction motor energy efficiency standards, revised in 2005 as "GB18613-2006 small and medium-sized three-phase asynchronous motor energy efficiency rating and energy efficiency rating", since July 1, 2011, small and medium-sized asynchronous Motor implementation of the national two (IE2 efficient) energy efficiency standards.

September 1, 2012, China's implementation of "GB18613-2012" standard, the provisions of September 1, 2016, small and medium-sized induction motor implementation of the new standard two (IE3 ultra-efficient) energy efficiency standards. According to the 2012 version of the standard, efficient motor only refers to the energy efficiency of two (equivalent to IE3) and above the motor, against the new national standards, China is now the vast majority of motor products are not efficient motor.

China's existing motor energy efficiency improvement of the relevant policy is to prohibit the production, sale, procurement inefficient motor. In the production process, to encourage the production of efficient motor, mainly included in the national energy-saving products Huimin project, the state to be financially subsidized three types of efficient motor. In the use of links, eliminated in the use of inefficient motor, to encourage efficient motor replacement, to encourage the remanufacturing.

It is understood that energy-saving products Huimin project to encourage production enterprises to produce efficient motor. The efficient motor is included in the national energy-saving products Huimin project, the state to give financial subsidies to the three types of motors: low-voltage high-efficiency three-phase asynchronous motor, high pressure and efficient three-phase asynchronous motor, rare earth permanent magnet synchronous motor.

Efficiency reform market space is huge

High efficiency means that less energy loss is accompanied by conversion from electrical energy to mechanical energy. Experts believe that through the "trade-in", you can use a variety of system energy-saving matching technology, the implementation of efficient re-manufacturing of electrical systems.

Motor efficient remanufacturing, product prices are more affordable, the new manufacturing motor compared to the price of 20% or more, after some of the specifications of the Shanghai subsidy than the new motor prices are lower And the efficient re-manufacture of the motor combined with the load equipment system power matching and energy efficiency improvement than the direct use of efficient motor energy saving better. But also to solve the motor update There are imported motor or old motor installation size and domestic standards are different and difficult to replace, and then to retain the original installation size.

Rare earth permanent magnet motor demand side sure

The promotion of efficient motors requires technical support from industry and industry. The phenomenon of reuse of used motor after the second off the assembly line is very common. In developing countries, the second off the assembly line up to 5-6 times, is still inefficient motor, but also to be used for twenty years.

According to the experts, permanent magnetization transformation is technically simple and feasible, and cheap and efficient environmental protection. China is rich in rare earth resources, NdFeB production ranks the forefront of the world. It is an effective way to improve the energy efficiency of electromechanical systems in China through the permanent magnetization of existing inefficient induction motors and the supporting high efficiency control system. After years of technical research and development and production practice, China's rare earth permanent magnet motor production technology has been very mature, the formation of low-voltage ultra-efficient three-phase permanent magnet synchronous motor, high-pressure ultra-efficient three-phase permanent magnet synchronous motor, high-pressure ultra-efficient three- Motor, dedicated series of ultra-efficient three-phase permanent magnet synchronous motor.


Compared with the traditional motor, rare earth permanent magnet high efficiency motor with energy efficient, lightweight materials, small size, good speed, reliability and other characteristics. Can be widely used in fans, pumps, compressors and other general equipment, can also be used in electric vehicles, wind power, CNC machine tools, oil pumping units, mobile power plants and other fields.

Industrial energy efficiency for each increase of one percentage point, can save about 26 billion kwh of electricity. It can be seen that the improvement of motor efficiency, reduce motor energy consumption, research and development to promote the use of efficient, ultra-efficient motor, has its very important national energy strategic significance and practical social benefits. Speed up the promotion and application of energy efficient motor, for the completion of the "second Five-Year" energy-saving emission reduction tasks, to promote industrial restructuring and upgrading of significant significance.

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