David Massey wrote :
>
> At one level the only difference between a motor and a generator is the
> direction of power.
Even crazier, a DC motor actually does act like a generator at the same time
it's being a motor. The reason the current it draws goes down as it's speed
goes up is a phenomenon called "back EMF", where the voltage generated by
the motor partially counteracts the voltage applied. If the motor is turned
fast enough, the back EMF exceeds the applied voltage, and the motor starts
to generate power. (For a parallel wound, or permanent magnet motor.
Series-wound is a different story, because the current through the armature
is also the field current.)
Randall
/// triumphs@autox.team.net mailing list
/// To unsubscribe send a plain text message to majordomo@autox.team.net
/// with nothing in it but
///
/// unsubscribe triumphs
///
|