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High energy consumption elimination motor transformation
High energy consumption elimination motor transformation
Product details
High energy consumption elimination motor transformation
Electric motor systems are widely used in various industries and fields such as metallurgy, petrochemicals, chemical engineering, coal, building materials, public facilities, and household appliances. According to statistics, in 2013, the number of electric motors in China was about 2 billion kilowatts, with a total power consumption of about 3.3 trillion kWh, accounting for 64% of the total electricity consumption in society. Among them, the total power consumption of electric motors in the industrial sector was 2.8 trillion kWh, accounting for 75% of industrial electricity consumption. At the same time, the number of low efficiency electric motors in China is 1.7 billion kilowatts, and it is now expected to exceed 2.5 billion kilowatts. In the past five years, the country has invested more than 4 billion yuan to promote the transformation of high-efficiency motors, with a transformation rate of no more than 5%. There are still 2.1 billion kilowatts of electric motors in low efficiency operation. If a transformation capacity of 50 million kilowatt hours is formed every year, with an annual operating time of 6000 hours and a load rate of 50%, the power consumption is 150 billion kilowatt hours. Calculated at a 10% energy-saving rate, 15 billion kilowatt hours can be saved, 4.8 million tons of standard coal can be saved, 3.2 million tons of carbon dioxide emissions can be reduced, and the operating costs of enterprises can also be significantly reduced. According to the GB18613-2012 standard, most of the motors currently produced and in use in China have a third level energy efficiency lower than the standard requirements, with an average efficiency of 87%. The efficiency of high-efficiency motors promoted by developed countries has reached91%above. The efficiency of ultra efficient motors in the United States is as high as 93%, and the system operating efficiency is 10-20% higher than that in China. In response to this situation, our company's research and development institution has developed an overall structural optimization and transformation technology for replacing old motors with AC permanent magnet synchronous high-efficiency motors for high-energy consumption elimination of electric motors.
What are the advantages of high-efficiency and energy-saving motors
High efficiency energy-saving motor refers to a motor with high efficiency that is a universal standard type motor. The high-efficiency and energy-saving motor adopts new motor design, new technology and new materials, which improve output efficiency by reducing the loss of electromagnetic energy, thermal energy and mechanical energy. Compared with standard motors, the energy-saving effect of using high-efficiency motors is very significant, with an average efficiency increase of 4% under normal circumstances. Its main advantages include: saving energy and reducing long-term operating costs. It is very suitable for use in textiles, fans, water pumps, and compressors. By saving electricity for one year, the purchase cost of the motor can be recovered. The rare earth permanent magnet high-efficiency energy-saving motor itself can save more than 15% of electrical energy compared to ordinary motors. It can be started directly or regulated by a frequency converter, and asynchronous motors can be replaced comprehensively. The motor current is small, saving transmission and distribution capacitance, extending the overall operating life of the system. The motor power factor is close to 1, improving the quality factor of the power grid. It can achieve soft start, soft stop, and stepless speed regulation without the need for a power factor compensator or driver, further improving the energy-saving effect.
Product transformation features
The rare earth permanent magnet high-efficiency three-phase synchronous motor has completely solved the problem of demagnetization in ordinary motors in the past, and has been designed and selected from various aspects
The following improvements are made:
1Remove the rotor steel plate, measure the actual load of the motor, induce the magnetic field, and assemble the corresponding permanent magnet strip.
2Choose high-quality permanent magnets, remove the old motor stator winding, and replace it with a new one.
3Adopting advanced ultra-high intrinsic and magnetic coercivity permanent magnets, with sufficient intrinsic and magnetic coercivity, and high operating temperature
Reaching 180 degrees, far higher than the actual rotor temperature of the motor, ensuring that the permanent magnet does not lose magnetism for 15 years.
4Replace the domestic bearings of asynchronous motors with imported German bearings to improve their service life, reduce friction, and increase energy efficiency.
5Cleaning and tidying up the motor casing, eliminating the advantages of high energy consumption in motor transformation, and utilizing the old motor casing at half the cost of a new permanent magnet motor.
6High power factor, high mechanical efficiency, low losses, large starting torque, low temperature rise, and reliable operation.
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