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Best efficiency DC or AC motors?

  1. Sep 3, 2007 #1
    I was thinking in the last weeks about electric cars and thinking about a DIY project in a future.

    Here's the problem, which motor is best for an electricar? Which have the best efficiency, torque and speed?

    Now considering that choosing an AC motor an inverter is needed and there would lost some energy, which one is the best for the diy project?
  2. jcsd
  3. Sep 4, 2007 #2


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    Three-phase AC induction motors are the most efficient.

    - Warren
  4. Sep 6, 2007 #3
  5. May 8, 2008 #4
    AC or DC

    DC is the better choice for power at low speeds. If the AC motor is used a Vector type control would be needed to give torque at low speed. DC is simpler and less expensive and can provide what is needed. A brushless DC motor is nothing more than a glorified induction motor.
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