Linear motor technology in urban rail development prospects
The rhythm of urban life is always rushing, fast-moving, people coming and going, people are helpless, and the high-pressure life rhythm puts a lot of pressure on urban transportation. In recent years, linear motor technology has begun to move to improve the urban track. Today we look forward to the future development of linear motor technology in urban orbit.
The traditional technical mode of rotating electric motor drive and transmitting traction by using wheel and rail has the disadvantages of small adhesion, poor climbing ability and large running noise. The LIM-driven rail transit system solves these problems better. The tunnel section of the LIM drive system is about 50% of the traditional subway, which greatly reduces the cost of civil engineering; the LIM drive system is a non-adhesive drive system, and the climbing ability It can reach 80‰, which is much better than the traditional 30-wheel drive system. It is very suitable for the “underground-ground-high” three-dimensional development mode; the LIM drive system directly transmits traction without intermediate mechanical transmission and no mechanical transmission loss. Reduced running noise. According to the design data of Guangzhou Metro Line 4, its operating noise is only 73 decibels. In addition, the LIM drive system has a low life cycle cost, reduces operating costs, and significantly increases equipment reliability.
The LIM-driven rail transit system has the following advantages: excellent dynamic performance; excellent curve passing performance (minimum curve radius can be around 80 meters); tunnel cross-section structure is miniaturized; vibration and noise are greatly reduced. These are unmatched by traditional rail transit systems.
The development of trains for linear motor delivery systems has a long history in the world. At present, there are nine lines of LIM rail transit systems in four countries including the United States, Canada, Japan and Malaysia.
I believe that in the near future, China will improve and improve this technology for the benefit of urban residents.
