Three-phase asynchronous motor control theory

The energy industry as the foundation of the national economy, for the development of society, economy and the improvement of people's living standard is very important. In the rapid growth of economic environment, China's energy industry faced with dual pressure of economic growth and environmental protection. With the development of computer technology, both in production and life, people's dependence on digital information degree is higher and higher. If the computer is the brain, is neural network, the three-phase asynchronous motor drive system is bones and muscles. The perfect combination between them is the development direction of modern industry. Closely integrated in order to make the ac speed regulation system and information system, at the same time in order to improve the performance of ac speed regulating system itself, must make ac speed regulation system to realize the full digital control. electric vehicle motor Single chip microcomputer has been widely used in the field of ac speed regulating system. For example in 1983 by Intel company development and production of MCS - 96 series is currently one of the high performance MCU series, suitable for high speed and high precision of industrial control. The high-grade type: 8 x 196 KB, 8, 8 x 196 x 196 kc MC, etc on the application of ac speed regulating system in general. The current global economic development, there are two significant interwoven lines: energy and the environment. Energy of tension is not only restricted the considerable economic growth in developing countries, also brought quite a big problem for many developed countries. Where energy concentration also tend to be the focus of the world's hot spots. 

And the development and utilization of energy and protecting the environment has a significant impact. Global warming, acid rain, and a series of environmental disasters are related to the development and utilization of energy. Due to the development theory of ac motor control, the control strategy and control algorithm are also increasingly complex. Extended kalman filtering, FFT, state observer and adaptive control, artificial neural network, and so on are applied to all kinds of ac motor vector control or direct torque control. Therefore, DSP chip in the high performance ac speed regulating system of full digital find skill stage. Such as TI company's MCS320F240 DSP chip, with its high cost performance has become a fully digital ac speed regulating system of choice. TI company recently launched MCS320F240X series products more price down to the level of SCM (single chip micyoco). In the process of fully digital ac speed regulation, various bus also has played a major role. STD bus, industrial PC bus, field bus and CAN bus in the field of automation application of Motor vehicle ac motor system played an important role. The data show that, under the influence of capital, technology, energy prices, China's energy efficiency is much lower than the developed countries. Energy-intensive products of China in the 90 s energy is generally higher than in developed countries 12% to 55%, more than 90% of the energy in the mining, processing and transformation, in the course of storage and transportation and terminal loss and waste. If the energy consumption per unit GNP (tons of standard coal/thousand dollars) country (mid - 90 - s), China respectively is Switzerland, Italy, Japan, France, Germany, Britain, the United States, Canada, 14.4 times, 11.3 times, 10.6 times, 8.8 times, 8.3 times, 7.2 times, 4.6 times and 4.2 times. In 1995, China's coal-fired power plant coal consumption of 412 grams of standard coal/kWh, 1.27 times that of the international advanced level. Therefore, the effective use of energy in our country is very urgent. As one of the large energy consumption of the motor in the aspect of energy saving is a potential can be dug. The total installed capacity of 400 million kilowatts of motor in China, 600 billion KWH, electricity consumption accounted for about 80% of the industrial electricity consumption. In all kinds of used motor, more than 80% for small and medium asynchronous motor under 0.55 220 kw. Overall equipment level in motor system in China is equivalent to the level of developed countries' 50 s. Therefore, 15 plans in the country, the motor system energy saving investment up to 50 billion yuan, so the variable frequency speed regulation system in our country will have a huge market demand. At present, the domestic research in variable frequency speed regulation system is very active, but also is not very ideal in terms of industrialization, most of the market is still dominated by foreign companies. Therefore, in order to accelerate the development of domestic Y series motor variable frequency speed regulation system, www.dongfeng-motor.com you need to the international development trend of variable frequency speed regulation technology and the domestic market demand have a comprehensive understanding.