Alstom's ANP and their demo train

Alstom in China pioneers new traction system

The new traction system was fitted on a demo train operating on Chengu’s Line 7.2023, Alstom

Alstom NUG Propulsion System (ANP), the company’s joint venture in China, has recently debuted a novel traction system on one of its trains. Trial operations in the city of Chengdu with passengers are currently underway. The project builds on earlier tests with the use of novel traction technology in Sweden.

The new traction system was fitted on a demo train operating on Chengdu’s Line 7. The novelty lies in the new generation of silicon carbide (SiC) traction convertor and the permanent magnet motor propulsion system (PMM). The use of SIC as semiconductor material should mean higher voltage operation. It can also better handle wider temperature ranges and the switching of frequencies. The benefits of PMM are down to better reliability, lower weight and smaller dimensions. The technology also boasts high efficiency and power.

“Thanks to the use of SIC and PMM technologies, 30 per cent of energy is saved for train traction”, Alstom says about the new traction system. “The maintainability is increased by adequate design of the new converter. This significantly makes maintenance operations more convenient”, the company also notes.

The project in Chengdu, located in Sichuan province, builds on earlier trials with will SiC integration. This happened in Stockholm, Sweden, using the Bombardier-developed Vasteras TC1500 traction converter on board C20 train set of the Stockholm metro. Bombardier was since acquired by Alstom.

ANP was able to improve its next generation of silicon carbide and permanent magnet motor traction system on several points: running a higher frequency, better packaging and greater efficiency and reliability. The company also developed new control units and technology.

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Author: Nick Augusteijn

Chief Editor,

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