The concept of 1. remanufacturing

Remanufacturing is an important policy measure promoted and encouraged by the state to promote the comprehensive utilization of resources and promote the transformation of economic development mode for the industrial product manufacturing industry. it is an effective means to implement the Circular economy Promotion Law and promote the construction of a resource-saving and environment-friendly society; it refers to the use of advanced and applicable green remanufacturing technology and technology, after upgrading and transforming waste industrial products with ordinary efficiency, overstock and pottery, products whose performance and quality meet the new product standards; the Ministry of Industry and Information Technology is responsible for the management and supervision of the certification of remanufactured products, formulating relevant systems, standards and implementation plans, organizing the certification work and publishing the ''Remanufactured Product Catalogue'', Develop and cultivate emerging industries of circular economy; it is an important measure to achieve energy conservation and emission reduction, develop circular economy, and build a resource-saving and environment-friendly society.

　　2. what is the motor energy efficient remanufacturing

High-efficiency and energy-saving remanufacturing of motors refers to the use of high-tech dismantling, cleaning technology, repair technology and the use of new materials and new technologies (including the use of nano-material technology to modify materials to improve insulation performance and reduce kg/kW value) to upgrade and transform the original ordinary efficiency, inventory backlog and pottery old motors through redesign, optimization and replacement of parts, based on the criteria of high quality, high efficiency, energy saving, material saving and environmental protection, high efficiency motors or special motors for energy saving of systems suitable for specific loads and working conditions are remanufactured.

　　The basic principle of high efficiency and energy saving remanufacturing of 3. motor

Through the feasibility analysis of high-efficiency and energy-saving remanufacturing of the original motor, judge and select the available or reusable parts, improve the recycling rate of resources, and carry out high-efficiency and energy-saving remanufacturing of the original motor, including high-efficiency remanufacturing of the motor, capacity-increasing remanufacturing, capacity-reducing remanufacturing, voltage-reducing remanufacturing, voltage-reducing remanufacturing, pole-changing and speed-changing remanufacturing of the motor, replace parts and other methods to create high-efficiency motors or special motors for system energy saving for specific loads and operating conditions.

　　Application scope of 4. high efficiency and energy saving remanufactured motor

High-efficiency and energy-saving remanufactured motors use new materials, including patented products developed by Changsha Electric Machinery Group Co., Ltd., including FY and FS series new electromagnetic wires, thinned insulation and other new process materials and new technologies, to carry out specialized and optimized technological transformation, so that remanufactured products can achieve better energy-saving and environmental protection requirements in terms of technical performance, safety and quality. Its scope of application is as follows ﹕

1. When the running time is more than 3000 hours/year and the load rate is more than 60% of the ordinary three-phase asynchronous motor with constant speed operation, it is remanufactured into a high-efficiency or ultra-high-efficiency three-phase asynchronous motor;

2. When the load rate changes greatly and the speed change range is large, but the ordinary three-phase asynchronous motor that does not require continuous and smooth changes is re-produced as a special motor for variable speed;

3. When the load rate changes greatly, the speed change range is also large and the ordinary three-phase asynchronous motor changes continuously and smoothly, it is remade into a special motor for variable frequency speed regulation and a special motor for internal feedback speed regulation;

4. When the running time is more than 3000 hours/year, the load rate does not change much, the light load running time is longer, the long-term "big horse-drawn trolley" and the ordinary three-phase asynchronous motor running at constant speed are reduced to form a low-capacity motor;

5. When the running time is more than 3000 hours/year, the three-phase asynchronous motor with long-term overload and constant speed operation of the motor shall be increased and remanufactured to create a high-capacity motor that meets the normal operation of the load;

6. When the running time is more than 3000 hours/year, the ordinary three-phase asynchronous motor with unreasonable matching is used for load and working condition, and it is remade into a three-phase asynchronous motor dedicated to the system;

7. When the traditional airborne collector ring often has a wound three-phase asynchronous motor with frequent ignition, vibration and replacement of carbon brushes, it is remanufactured to form a new split collector ring device, which can effectively solve the original device A series of technical problems brought about by this;

8. When the load rate of the motor system changes greatly within the operating range, but it is not suitable for the transformation of frequency conversion or internal feedback, the motor can be remanufactured by reducing the voltage;

9. When the motor system affects the normal operation of the motor due to the large loss of transmission lines and other reasons, the motor can be remanufactured with low voltage rise and high voltage, low voltage and large capacity to high voltage and low power.

　　Energy saving effect and practical value of 5. high efficiency and energy saving remanufactured motor

1, remanufactured high-efficiency motor

Compared with ordinary high-regular motors, the comprehensive technical performance and protection level of remanufactured high-efficiency motors can be improved to a certain extent. Compared with similar products of Y and YKK series, its efficiency is increased by an average of 10 percentage points, I .e. 1 ~ 10%. Due to the high load rate efficiency of high-voltage motors in actual use and the long annual average running time, at this stage, the overall use of the actual motor market energy-saving effect, the most valuable with its high-voltage motor is more prominent. For example, Y560-6 6kV IP23, the efficiency of ordinary regular motors is 95.6, while the efficiency of high-efficiency motors made by remanufacturing is 96.4. Based on the annual operation time of 8000h, the annual power saving is 97224h h.

2. Remanufacture variable frequency speed motor

For three-phase asynchronous motors operated by remanufacturing frequency conversion and speed regulation, the power saving rate can reach more than 50%. At present, the total installed capacity of high-voltage motors above 3kV in China is 0.144 billion kw, and the annual growth rate is 500~6 million kW. If 1/3 of the motors (35%) need speed regulation, there will be 0.21 billion kW × 35% = 0.074 billion kW in the next 10 years. If calculated at the price of 1000 yuan/kW, the total market amount in the next ten years should be roughly 1000 × 0.074 billion kW = 74 billion yuan. Considering other factors such as price, the actual total amount should be between 80 billion and 90 billion yuan, and the annual average amount should be between 8 billion and 9 billion yuan. Of course, this is the annual average market capacity after the market is stable. If, with the support of relevant government departments and related industries, the annual planned transformation of 5 million ~ 6 million kW of inefficient fans and pumps, with an average annual investment of 7 billion ~ 8 billion yuan, can produce direct benefits of 5 billion ~ 6 billion yuan that year, accounting for 70% of the total investment, while the service life of variable frequency speed motor is at least 15 years, the long-term economic benefits are very obvious.

3. Remanufactured compact high-efficiency energy-saving environmental protection motor

The efficiency of the remanufactured compact, high-efficiency, energy-saving and environmentally friendly motors is increased by an average of about 5% compared with similar products of ordinary motors. Due to the high load rate of high-voltage motors and long annual operation time, the actual energy-saving effect is more significant. According to the annual production of 2 million kW motor, annual operation of 8000h, electricity charge is 1 yuan/kW.h, the remanufactured motor can save electricity charge of 0.17 billion yuan per year compared with similar ordinary motors.

4. Remanufactured variable speed environmental protection energy-saving motor

The remanufactured pole-variable speed environment-friendly energy-saving motor has simple structure and obvious energy-saving effect. For example, a two-speed motor with a fan load has a motor power of 1000kW at 6 poles. Because the power of the fan and water pump loads varies inversely with the third square of the rotating speed, its power is 420kW at 8 poles. For example, it is in a low speed state for 1/3 of a day and 139000 kilowatt hours of electricity per year.

5. Remanufacturing low-voltage high-power motor

Compared with similar high-voltage motors, the efficiency of remanufactured low-voltage high-power motors can be greatly increased. Take a 450kW, 4-pole motor as an example, the efficiency of 6kV high-voltage motor is 94.0, while the efficiency of remanufactured low-voltage high-power motor can reach about 96.3. If long-term use is calculated by running 8000 hours a year, another motor of the same specification can be bought according to the electricity saved in one year by industrial electricity price, high efficiency to market promotion.