Search results

Date Relevance Most replies

  1. C

    12 kw rc motor

    The power capabilities could be verified by running it as a generator with a common resistive load instead of waiting for a working controller, if that is all that's needed. It's admirable but perhaps out of place for the designers to take responsibility for finding the perfect controller...
  2. C

    14kw continuous 94% efficient motor.......

    any progress on this motor, or has the project died?
  3. C

    12 kw rc motor

    Correct, if battery amps is the limiting factor a y/d switch will not improve performance. However, since the amp limit of controllers generally apply to both motor side and battery side (sometimes they can take some more amps on the motor side, but rarely 1.73 times as much), and the motor amps...
  4. C

    12 kw rc motor

    Unless the controller is so powerful it can push the motor torque to the limit in delta termination, being able to switch to y termination at low speeds will enable an increase in torque. Switching back to delta at higher rpm's will restore the rpm capability. A y/d switch should act about the...
  5. C

    12 kw rc motor

    How about just wrapping the motor cables around some ferrite cores? It will add inductance in series and help the controller but doesn't need to add much losses. It is sometimes done with ironless motors for the same reason. Also, a y/d switch would be nice, but mainly for performance reasons...
  6. C

    12 kw rc motor

    Actually, better conductivity makes the skin effect worse. That is probably part of the reason why aluminium is used instead of copper in those motors, the better conducticity of copper counts for less and thus the higher cost is no longer justified. However, using silver plated alumium bars, or...
  7. C

    12 kw rc motor

    The solid slot motors seem great, but they may end up suffering from skin effect. The use of aluminium reduces this effect, but then again aluminium has less conductivity to begin with. In some situations, solid slot can be great. But thorough calculations must be made to check that it actually...
  8. C

    12 kw rc motor

    Using multiple controllers is quite possible and has been done before. That guy who made an axial flux motor out of plywood used no less than seven RC controllers for testing, and later again on the finished motorbike after the kelly controller had burned out. As it seemed, he let each of them...
  9. C

    14kw continuous 94% efficient motor.......

    So what was the no load losses at these rpm's?
Back
Top