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BMW Develops Pad to Wirelessly Charge Electric Cars
Just another gimmick or game changing?
BMW Develops Pad to Wirelessly Charge Electric Cars | News & Opinion | PCMag.com -
Electric motor efficiency introduction
Source: Check out the details inside an electric car motor
. . .
While the improvements in the automobile internal combustion engine are well documented, the state of the electric motor is less well known -- at least among those of us who focus on the auto industry. At Automotive News, we've rarely written about the internal workings of the electric motor and the engineering challenges it poses as it moves into high volume production and use. That seems likely to change.
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That will soon change, says John Tintinalli, director of the global product group for ground vehicles at SAE International. He said SAE is developing a standard way to measure efficiency of electric motors, as well as torque and horsepower.
The Chevrolet Volt has two electric motors -- one is 96 percent efficient, while the other is 94 percent efficient. Nitz says electric motor efficiency at GM is...
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