High Power AC Motor China’s energy saving technology trends
Energy shortage and environmental pollution facing mankind the common problem of the century. Since the 70s of last century’s two world-wide energy crisis and the seriousness of the current environmental issues, has drawn worldwide attention on energy-saving technologies. China’s energy production and consumption are listed second in the world, but still far from meeting the industrial production and development needs of the people living in very tight energy situation, but because of the huge gap in energy efficiency, resulting in significant energy consumption per unit output value , staggering waste of energy each year. If a considerable part of the fan, pump type load, thanks to constant speed drive, a lot of wasted energy. Such drag system drag about half of the total industrial electricity, if we adopt energy saving technology can save at least 20% of the electricity. China’s “Eleventh Five-Year Plan” put forward continuously improve energy efficiency and energy efficiency goals, the focus is on energy conservation to implement energy-saving technology out widely. One of the important measures is to gradually achieve motors, fans, pumping equipment and systems of economic operation, the development of motor control and power saving electronic power saving technology, the only way to lower energy consumption and greater elasticity energy savings in the long term support of rapid economic, health, sustainable development.
In addition, a large number of coal, oil without further processing to be burned, not only use low heat, but also caused serious pollution to the environment. Currently, excessive vehicle emissions causing global warming has also contributed to air pollution in Beijing one of the main. To solve urban environmental pollution and traffic congestion is an important way to develop high-speed public transport (subway, light rail) and electric vehicles, high-speed electric trains are to achieve the preferred inter-city rapid transit, the core technologies are in the last century, and since 80 keep pace with the rapid development of microelectronics up a new technology??? Modern Power Electronics and AC motor drive technology. Moreover, in the rolling, paper making, cement manufacturing, mine hoist, ship propellers and other industrial and civil fields should also be widely used medium and large-capacity induction motor control system. At this point, communication timing system will not only save energy, but also to achieve the best overall system performance, improve conditions and greatly improve production efficiency and product quality.
From the information currently available on the market to provide the high capacity speed product can be seen, the current annual worldwide motor control system hardware, software and peripherals sales of 48.5 billion U.S. dollars. One of Europe, the Middle East and Africa accounted for a total of 39% and 27% in Japan, North America accounted for 21%, Asia 12% and, finally, Latin America 1%. Sales from the system power distribution, low-power speed control system still dominates market, 1 ~ 4kW of the speed control system of the total sales of 21%, 5 ~ 40kW system is 26% of total sales. But as with IGBT, IGCT, represented a new type of composite device voltage, current, and the rapid increase switching performance, large capacity AC motor speed control technology will be rapid development and great progress, and its market prospect is very encouraging.
Foreign large-capacity high-performance AC motor drive technology research and application are far away in front of us, there MV? A-level a large number of high-voltage inverter products to market, and applied electric locomotive, ship propulsion, rolling , paper and water supply systems, AC motor speed regulation technology and its products have become the leading industry in industrial countries. At present China’s large, medium-capacity AC variable speed system development work started late, many places are required by the occupation of foreign products.
Therefore, the development of reliable, affordable, middle-capacity high-performance AC motor speed regulation system and put into mass production as soon as possible, to promote economic development, economic growth pattern, and reduce unit
Output energy to break the Western monopoly in this field, will have important strategic and practical significance.
As the development of power devices and topology to achieve breakthrough, high-capacity AC motor speed control technology presents a new look with great development opportunities.
Traditional high-power inverter circuit as large in size and poor performance, and produce more harmonic grid, so applications are increasingly limited. The new multi-level inverter with dynamic performance as well, and motor power grid harmonics produced less, you can increase voltage, etc, are more and more attention. When the PWM technology for multi-level inverter, it will produce some improvement programs, large-capacity high-performance inverter applications played an important role.
At present the characteristics of China’s motor drive technology is based on low voltage, small capacity speed object oriented, high pressure, high efficiency of frequency control devices to the main imports. Face energy, the urgent need to improve the technology and huge market potential, domestic high-voltage power converter products is also basically just started. However, difficulties and hopes, challenges and opportunities coexist. Internationally with the production, development of new high-power frequency conversion device capabilities are world-renowned large electric Electric Company, because of their technology development in power electronics has been implemented step by step process of the formation of a semiconductor device to the machine from power production of a full set of industry sectors, market inertia and large enterprise organizations make their own they will not immediately Transferring new products. In China, a new hair.
Developing countries, although some of the old technology investment, but investment is relatively small, the burden is not, you can immediately transfer the latest technology development and use of learning from experience, they have traveled across.
In the latest research results achieved in the field as soon as possible on the basis of industrialization, could significantly reduce the gap with advanced countries, in some ways can even exceed them. Looking at the present, large-capacity AC motor speed control technology is ripe, the domestic as long as the system, production management and business decision-making on track, its development will thrive.
I am a professional editor from China Products, and my work is to promote a free online trade platform.
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