Energy-saving artifacts": increase motor power of high-speed rail by 60%

Ding Rongjun referred that in 2014, traction system of Zhuzhou Electric Locomotive Research Institute (zelri) zelri has occupied 57% urban rail market share, and gradually the induction motor system will be replaced by permanent magnet propulsion system.

Zhuzhou, Deputy General Manager and Chief Engineer of CSR times electric, affiliated company to zelri, said: "high-efficiency and energy-saving is the most outstanding advantage of permanent magnet propulsion system.” Statistics showed that the 690KW PM synchronous motor developed by the zelri is 60% higher in power than the current mainstream asynchronous motor.

According to operation data of Shenyang Metro Line, Liu Kean developed a tally that: Energy saved annually in this way may reach to 4million Yuan. "That's profit, who can resist this?”

An industry analysis report from Liu Kean shows that by 2020, there will be about 100 urban rail transit lines built all over the country. If permanent magnet traction system were applied to 60% new lines, output value would reach 10 billion, and annual energy savings of newly operating lines will achieve 240 million Yuan.

Permanent magnets also showed strong competitive edge in central air conditioning systems. 40% energy saving can be achieved in central air conditioning of variable frequency drive system based on permanent magnetism. For a 240kW central air conditioning running 4 months a year, at least 115,200 kilowatt hours can be saved. If there were over 40000 central air conditioning systems in the country, there would be 4.6 billion kilowatt-hours saved and 460,000 tons carbon dioxide release reduced.

Since R&D started in 2009, zelri has developed successfully the world's first commercial central air conditioning based on high-speed permanent magnet direct drive system, become the only one supplier of central air conditioning with PM drive system. Till the end of April 2015, PM drive system has been used in more than 400 central air conditioning systems . On the China Refrigeration exhibition in April this year, Gree electric appliances launched to market a central air conditioning system mounted with permanent magnet synchronous inverter heat pump centrifuge as its high-end product.

High-efficiency and energy saving achieved from Permanent magnet traction system has helped zelri hold lion ‘share of market in electric vehicle, wind power generation, 100% low floor modern trams and other fields.

As Feng Jiang-hua referred, research and development and industrial application of permanent magnet traction system is still in the initial stage. "In the future, to achieve over all layout and staying ahead in industry, zelri will on one hand vertically deepen and refine technology development, on the other hand horizontally expand the application fields of PM traction technology, to achieve a comprehensive layout and stay ahead.

China Rare Earth Magnet Limited