China's Permanent Magnet Synchronous Traction System Passes Ground Testing

Recently, the reporter learned from the CSR Zhuzhou that the institute developed a new generation of "high-speed rail power" - high-speed train permanent magnet synchronous traction system, successfully passed the national railway testing and testing center ground test assessment. The successful development of this system indicates that China's high-speed rail power technology is expected to enter the "permanent-magnet era."

The performance of the traction system, to a certain extent, determines the power quality, energy consumption, and control characteristics of rail transit vehicles, and is a key component of the energy-saving upgrade of rail transit vehicles. Due to its significant advantages such as high efficiency and high power density, it is highly regarded by the international community. At present, the permanent magnet synchronous traction system is gradually replacing the traditional asynchronous traction system on a global scale, and has become the mainstream research direction of the next-generation train traction system.

In 2012, CSR Zhuzhou undertook the National 863 Project “Study on Permanent Magnet Synchronous Traction System for High-Speed Trains” and successively conquered the three major technologies of permanent magnet synchronous traction system, motor and control. Including traction converters, network control systems, permanent magnet synchronous traction motors. Using this system as a driver, energy savings can reach more than 10%. Among them, the self-developed JD188 high-power permanent magnet synchronous traction motor, rated power of 690 kilowatts, is currently the world's largest rail permanent magnet synchronous traction motor. The motor has the advantages of stable speed, high efficiency, small size, light weight, low noise, and high reliability. In Qingdao Quartet, the vehicle has been on-line.

According to Feng Jianghua, deputy general manager and chief engineer of CSR Zhuzhou Institute, the permanent magnet synchronous traction system is adopted for high-speed trains. On the one hand, the high power density characteristics of permanent magnet motors can be utilized to reduce the ratio of train to trailers and to reduce the cost of traction systems for trains. On the one hand, the high efficiency characteristics of permanent magnet motors can be used to improve the traction efficiency of trains, save a lot of electric power, reduce the life cycle cost of trains, and further increase the comprehensive competitive advantages of China's high-speed rail in terms of energy saving and emission reduction, so that high-speed trains can be towed in China. System equipment technology ranks among the world leaders. (Reporter Yu Huiyou correspondent Guo Dan Cao Ting)

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