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Permanent Magnet Alternator load problem

Discussion in 'Electronic Design' started by Mark, Aug 6, 2007.

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  1. Mark

    Mark Guest

    Hi all,
    I've made a simple permanent magnet alternator. For the sake of
    experimentation I've attached the rotor to a D.C . motor, and the
    motor to a constant voltage power supply. When I complete the circuit
    with my wire coils, for some reason the current draw goes up and the
    rpms go down on the rotor. This happens whether there is a load or no
    load across the coils. The coils are in no way connected(intentionally
    at least) to the rotor or motor. I don't know what is happening, or
    how to prevent it. Any help would be appreciated.

  2. Tim Wescott

    Tim Wescott Guest

    Schematic? I'm not clear on what you're doing, although connecting the
    motor in reverse would make an effective brake.

    Tim Wescott
    Control systems and communications consulting

    Need to learn how to apply control theory in your embedded system?
    "Applied Control Theory for Embedded Systems" by Tim Wescott
  3. Tolstoy

    Tolstoy Guest

    "Complete the circuit with my wire coils"
    You completed some circuit that caused the coils to conduct. That of
    course lugs the motor.
    You didn't just short the alternator's output wires together, did
    you? Sorry, I had to ask.
    Anyway, the connection you made completed some circuit.
    What kind of alternator did you build single phase or something
  4. Mark

    Mark Guest

    Hey guys,
    Can I e-mail you a simple drawing of my setup to make things easier?
    My e-mail is .
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