"Whoever owns permanent magnet traction system, whoever owns the right of high-speed rail"
[Found Chinese original technology] China's high-speed rail used the world's most advanced traction technology
It took 11 years and accumulatively 10 million tests to accumulate 150G data and cost 100 million yuan. The Zhuzhou Electric Locomotive Research Institute Co., Ltd. (hereinafter referred to as "Zhuzhou Institute") of China National Trucks has overcome the third generation of rail transit traction technology, Magnet Synchronous Motor Traction System (hereinafter referred to as "Permanent Magnet Traction System"), with complete independent intellectual property rights, has become a major strategic weapon for the Chinese high-speed railway to win the market.
On May 16, 2015, the permanent magnet synchronous motor used by Changsha Metro Line 1 was successfully delivered. This is the first time in China will be loaded with permanent magnet synchronous motor train loading and unloading applications in the entire subway.
Ding Rongjun, academician of Chinese Academy of Engineering and general manager of Zhuzhou University revealed that at present, Zhuzhou has developed a 690kW permanent magnet traction system that can be used for high-speed rail car with a speed of 500 kilometers per hour and will soon be in small batch production. This marks one of the few countries in the world that have mastered the technology of the high-speed railway permanent magnet traction system after becoming a country like Germany, Japan and France.
"China has completely independent intellectual property rights of permanent magnet traction system has taken the pace of industrialization, China's rail transit 'permanent magnet traction era' has finally arrived." Ding Rongjun said.
From the "subway" to "high-speed rail use": "Climb Hengshan went to Mount Everest"
Traction drive system in the industry known as the "train of the heart," its performance to some extent determines the train's power quality, energy consumption and control characteristics, but also affect the train economy, comfort and reliability, energy saving The key to upgrade.
The first generation of world rail vehicle traction system is a DC traction system, the second generation is the AC induction motor traction system started in the 1970s and is the current mainstream technology.
According to Feng Jianghua, deputy general manager of Zhuzhou, "For the traction technology of the rail transit, the permanent magnet traction system is a revolution. Who owns the permanent magnet traction system will have the right to speak for the high-speed rail."
Permanent magnet traction system is the train's power system, which consists of two parts of the converter and motor, of which the converter is equivalent to the heart of the train, the motor is like the muscle of the train, the motor is mainly responsible for transmitting power to complete the electrical energy to mechanical energy conversion, Drive the train to run smoothly.
At present, Siemens, Bombardier and other international equipment manufacturers will be permanent magnet traction system as its research and development direction. China is not losing ground in this emerging field.
In 2003, the introduction of permanent magnet traction system for the first time introduced Feng Jianghua ears. At that time, the technology is still in the theoretical research stage. However, Feng Jianghua realized that the permanent magnet traction system will replace AC induction motor traction system and must be rapidly developed. That year, Zhuzhou took the lead in the formation of the first permanent magnet traction system research and development team, "from scratch."
Xu Junfeng, deputy director of Zhuzhou based and platform research and development center, said that in the R & D phase of AC induction motor traction system, our country lagged behind foreign countries for 20 years. In the more advanced field of permanent magnetism synchronization, "we are like cars without lights, Blind fire on the mountain blind exploration of the road, the direction of a little sure not allowed, the consequences are not just deviation.
"Motor temperature control is the biggest bottleneck in the progress of the project." Xu Junfeng introduced, in order to avoid corrosion of water, dust, iron filings and other internal permanent magnet motor, the motor adopts fully enclosed structure, but the motor power is too high, heat is too high, Under high temperature, high vibration and reverse magnetic field conditions, the serious risk of non-recoverable loss of magnetism may occur. "If the train lost its magnetism at high speeds, the consequences were unthinkable."
Feng Jianghua recalls that "there is no information that can be used for reference and lack of related equipment for research and development testing." Zhuzhou can only "feel the stones across the river" and many data still rely on the more primitive and stupid methods. "For example, a motor warming test is done for five or six hours, the motor temperature control data on the whole team squatting to record, so slowly accumulate." Feng Jianghua said.
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