Featured Products
The new generation of high speed train news dispatch are developed by Chinese Nanche Group 2014-11-06
The new generation of high speed train news dispatch are developed byChinese Nanche Group Zhuzhou PMSM traction system, recently has been successfully through the ground test of national railway test center. "Beijing News" reporter in Zhuzhou are the latest to understand, the first car equipped with permanent magnet traction system High-speed Rail has been off the assembly line in CSR Qingdao Sifang vehicle, will then enter the teststage, the fastest 3 years after the implementation of commercial operation.
"The original list of 8 car trains, need 6 carriages equipped with power; the use of permanent magnet synchronous traction system, only need 4 carscan be equipped with power, thereby saving the cost of the traction system of" 2 carriages, Xu Junfeng of vice director of Chinese CSR foundation and platform of R & D Center is responsible for the systematic study of Gao Tieyongci introduced said traction the use of high efficiency, the characteristics of permanent magnet motor, can improve the efficiency ofthe train traction, save a lot of power, and improve our High-speed Rail in energy saving, emission reduction, safety, comfort and other aspects of thecomprehensive competitive advantage.
Xu Junfeng said, because of the traction system is the core technology of locomotive, although the law, Germany, Japan and other countries in the development of permanent magnet traction system, but has been blockedChina implementation technology, R & D China permanent magnet in rail transportation was started relatively late, but has gradually catch up with foreign advanced level. Zhuzhou the permanent magnet High-speed Railreferrals, marking China's one of a handful of high Tieyong magnetictraction system technology of the countries in the world.
A decrease of at least 1 tractor power 10%
"R & D Institute of Zhuzhou since 2003 for permanent magnet traction system, has been catch up with world leading pace, and wholly ownedindependent intellectual property rights." Xu Junfeng said: "2011 startpermanent magnet R & D High-speed Rail, when the task is 600 kW, but in fact we did 690 kw".
Xu Junfeng citing says, although the AC asynchronous motor cost at present High-speed Rail single with permanent magnet motor cost than it is now the universal service increased by about 10%, but due to the characteristics of permanent magnet motor with high power density, by saving up than (refers to dynamic proportional and non power vehiclepower car a list of fixed formation trains), for example, a original 6 trains 2 drag, equipped with permanent magnet motor, it only needs to use 4moving trailers 4 can, traction system cost can save 2 trains make installation declined 20% traction system cost of the whole train of permanent magnet motor, on the other hand can the use of high efficiencycharacteristic of permanent magnet motor, improving the efficiency of the train traction, save a lot of power, reduce the cost of the whole life cycle ofthe train.
"The power of permanent magnet generator can be greater thanasynchronous motor, so the run up in the car, fewer motor requirements,"Xu Junfeng said: "if you keep the same aerodynamic drag ratio, will enhance the ability of the traction vehicle."
According to Xu Junfeng introduction, in general, the traction energy consumption of the system's total energy consumption accounts for about40% to 50% of the track traffic system. According to the data provided by the Southern Railway, in the Shenyang Metro in the measurement of PMSM traction system compared to the asynchronous traction system can realizeenergy-saving 9.61%.
After calculation, the current Metro statistical data is a train average every kilometer energy consumption for 13 degrees, according to one train every day on average 250 kilometers run, a line by 20 trains are calculated, thena line one day energy consumption for 65000 degrees, if electricity is calculated according to 0.85 yuan / kWh, if 96 tracks in 2015 the nationalplanning and construction of the traffic lines all use of PMSM traction system, then the annual operating energy consumption of new will save 192000000 yuan.
The 2 motor full closure of low noise low maintenance
The biggest difference between permanent magnet motor and asynchronous motor is the excitation magnetic field which is generated by the permanent magnet. Xu Junfeng said that the asynchronous motor, the need from the stator side absorption of reactive current to establish magnetic field, used for the excitation of the reactive current leads to lossincrease, reduce the motor efficiency and power factor, so the permanent magnet motor than asynchronous motor energy efficiency.
Xu Junfeng said that due to the ventilation cooling, the subway withinduction generator is the coil is exposed, the need for regular net of each motor is a clean, if not clean, filter blockage will affect the heat dissipation of the motor. The permanent magnet generator using a fully sealed type design, more safe and reliable, permanent magnet generator of the Zhuzhou R & D its insulation technology combines high power locomotiveand high iron traction motor insulation structure has the advantages ofhigher reliability, insulation, and closed the brand-new design, will effectively ensure the internal motor cooling system clean, relatively asynchronoustraction motor less maintenance, low noise.
Xu Junfeng said: "as the characteristics of permanent magnet traction motor structure and electromagnetic aspects, in its field application process at low speed system is more obvious than asynchronous motor with low noise. The whole system is probably reduced about 3 dB noise. No filter cleaning suchtedious work, life cycle cost of the system is greatly reduced."
The permanent magnet can help the country out of the "high iron more"
Zhuzhou deputy general manager, chief engineer, high Tieyong magnetictraction system general designer Feng Jianghua introduces to the reporter,the traction system technology is the core technology of high iron,permanent magnet technology breakthrough in the domestic high powerapplication, will make China's high iron on the world stage more core competitiveness.
Permanent magnet traction has become the research direction ofmainstream of the next generation of train
It is understood that the world rail vehicle traction system technology,experienced DC system, asynchronous system, permanent magnet system with three stages. PMSM traction system because of its remarkableadvantage of its high efficiency, high power, is gradually replacingtraditional traction system, become the next generation of train traction.
Chernice.li