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Old 01-22-2008, 10:59 PM   #9 (permalink)
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Most DC motors have brushes so they require some maintenance there where AC motors do not. AC motors tend to be slightly more efficient in my experiences - unrelated to cars - but the cost of converting energy from AC (wall) to DC (batteries) to AC (motor) again is costly in terms of efficiency as well. In a single motor, common scenario, regenerative breaking is only possible with AC.
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