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China Developing and Deploying Electric Vehicle Motors

14 July 2007

People’s Daily. China has developed its own electric vehicle motors after more than a decade of research, according to Wen Xuhui, top researcher of the electric vehicle project of the Chinese Academy of Sciences’ (CAS) Institute of Electrical Engineering.

China has proprietary intellectual property rights for the asynchoronous drive motors and the permanent magnet synchronous motors for electric vehicles.

“Some of the newly-developed motors have been used in electric vehicles produced by major Chinese automobile manufacturers,” Wen said.

Four electric buses driven by alternating current motors are being piloted on Beijing’s No. 121 bus line ahead of the upcoming 2008  Olympics.

“A dozen or so electric buses will hit the road soon,” Wen said.

Scaled production of fuel-cell buses, hybrid-electric buses and battery-electric buses are key tasks in China’s 11th Five-Year Program from 2006 to 2010.

Though great progress has been made in China’s hybrid automobile industry, experts maintain that its level of technology still lags far behind more advanced international standards. Experts urged the Chinese government to do more to support the production of hybrid cars in China.

July 14, 2007 in Brief | Permalink | Comments (1) | TrackBack (0)

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Since China is very good at producing computer mother boards at low cost, perhaps it can also put electronic car motor drives in mass production to make them cheap. But for now, wound field DC motors with brushes are entirely adequate for automobile use and can even provide a high level of regeneration without a single transistor in the vehicle and at far less cost.

Whilst the largest electric and diesel electric locomotives may use induction motors, the inverter drives are far to expensive for the limited energy use of automobiles in average service. Glass or carbon fiber reinforcement of critical parts of the armature and comutator can have the motors operate at much higher speeds. The chinese manufacturers would do well to forget about induction motors entirely and go right to switched reluctance motors that have even higher capacity at the same weight and less copper with higher efficiency. The drives are more complicated to operate but don't require any more silicon area capacity. High temperature Silicon Carbide transistors are now the latest for motor drives. China should make them too...hg...

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