Motors are not far from our production and life, ranging from the driving devices of fans, pumps and other equipment to the washing machines, electric fans and air conditioners commonly used in families. Motors are widely used in industries, agriculture, transportation, municipal administration, household appliances and other fields.
According to statistics, in 2015, China's motor ownership was about 2.4 billion kw, with a total power consumption of about 3.5 trillion kwh, accounting for 65% of the total power consumption of the whole society.
Through the improvement of energy efficiency, the efficiency of China's motor system can be improved by 5 to 8 percentage points as a whole, and the annual power saving can be 130 billion to 230 billion kwh, which is equivalent to the annual power generation of two to three Three Gorges power stations.
Few people know that the unobtrusive motor consumes more than half of the country's electricity. High efficiency motor is one of the most effective ways to save electricity. Promoting high efficiency motor has become a major event in China's economic transformation, energy conservation and emission reduction and even haze control.
"Electricity charges have decreased significantly." This is an obvious change after Guangdong Nengqiang Ceramics Co., Ltd. adopted high-efficiency and energy-saving motors. "Ceramics is a high energy consuming industry, and the cost of electricity accounts for a high share of the total cost." The person in charge of the company said that after the company applied the high-efficiency motor to the ceramic ball mill, the power saving rate reached 18%. According to the calculation of the average industrial power consumption of 0.8 yuan / kWh, 64624 yuan can be saved every year, and the investment and transformation cost can be recovered in more than one year.
In fact, motors are not far from our production and life, ranging from the driving devices of fans, pumps, compressors and other equipment to the washing machines, electric fans and air conditioners commonly used in families. Motors are widely used in many fields such as industry, agriculture, transportation, municipal administration and household appliances, Where it is necessary to convert electrical energy into mechanical energy or mechanical energy into electrical energy, motors must be used.
Because of its wide application, motor has also become the terminal equipment with the largest power consumption. It is estimated that in 2015, China's motor ownership was about 2.4 billion kw, with a total power consumption of about 3.5 trillion kwh, accounting for 65% of the total power consumption of the whole society; Among them, the total power consumption of motors in the industrial field is 2.9 trillion kwh, accounting for 74% of the industrial power consumption, and the power consumption of industrial motors accounts for 52% of the total power consumption of the whole society.
In recent years, with the support of national policies, China's motor energy efficiency level has gradually improved, but the overall energy efficiency level is still low. From the perspective of motors themselves, the average efficiency of motors in China is 3-5 percentage points lower than that in foreign countries. At present, only about 8% of high-efficiency motors are in use; From the perspective of motor system, due to unreasonable matching and backward regulation mode, the operation efficiency of motor system is 10 to 20 percentage points lower than the foreign advanced level. The massive use of inefficient motors causes huge power waste. Every 1 percentage point increase in motor energy efficiency in the industrial field can save about 26 billion kwh of annual power consumption.
Xu Dianguo, vice president of Harbin University of technology, said that through the improvement of energy efficiency, the efficiency of China's motor system can be improved by 5 to 8 percentage points as a whole, and the annual power saving can be 130 billion to 230 billion kwh, which is equivalent to the annual power generation of two to three Three Gorges power stations.
Energy saving of motor system is an important part of establishing an energy-saving society and developing circular economy in China, and its core lies in technological breakthrough. At present, there are two types of high-efficiency motors with absolute advantages in the market: ye3 series ultra-high-efficiency three-phase asynchronous motor and permanent magnet synchronous motor. However, according to all parties in the market, the actual energy-saving effect of ye3 motor is not good, and the permanent magnet motor will have different degrees of demagnetization after being used for a period of time; Reluctance motor has the advantages of stability and energy saving, but it is difficult to realize the technology.
The reporter found in the market research that through nearly ten years of research and development, Shenzhen Fengfa Technology Development Co., Ltd. has not only broken through the technical problems of switched reluctance speed regulation motor, but also successfully industrialized this technology. In October this year, this technology has passed the appraisal of scientific and technological achievements of the Ministry of industry and information technology, and its energy-saving effect can reach 15% to 20%, far exceeding the existing high-efficiency motor technology.
At present, the switched reluctance motor of the enterprise has been applied in ceramics, chemical industry and other industries. Zhou Qingyu, chairman of Fengfa Technology Development Co., Ltd., told the reporter of Economic Daily that after Shandong Laiwu Taihe Biochemical Co., Ltd. transformed the original three-phase asynchronous motor into an intelligent speed regulating motor, the power saving rate reached 20.16%. Foshan Liangjian Co., Ltd. conducted energy-saving comparative test on the ball mill, which showed that the power-saving rate also reached 14% to 16%.
It is worth noting that this technology will help solve the existing electric vehicle dilemma. Zhou Qingyu revealed that at present, if the motor technology of Fengfa Technology Development Co., Ltd. is used to improve the existing electric vehicle motor, the motor energy-saving rate can be as high as 50%. This also means that with the same battery capacity, the range of electric vehicles can be increased by 50%; Coupled with the non current impact characteristics of the motor, the service life of the battery will also increase by 100% to 20 years.
Experts said that on the one hand, the switched reluctance motor system is an ideal equipment for technological transformation and product upgrading of enterprises. When applied to industry, it can reduce energy consumption by more than 20%, reduce the emission of industrial waste and promote the transformation and upgrading of enterprises. On the other hand, motor, electronic control and power supply are the three key points of electric vehicle enterprises. New motors can be used as a breakthrough to solve the problem of short mileage of pure electric vehicles and promote the further development of China's electric vehicle industry.