Polarity from induction motor

Discussion in 'General Electronics Chat' started by JStitzlein, Feb 21, 2011.

  1. JStitzlein

    Thread Starter Member

    Dec 6, 2010
    I'm confused on what changes the polarities of currents and voltages in the wire loop.

    The worksheet says " Current & Voltage change direction with change in magnet motion". Does this mean that the north or south pole of the magnet does not matter and just throws the current/voltage in the other direction while it passes?

    Even if the polarity matters, what is the first polarity given that the wire loop starts level, then goes 45 degrees equally distant? like this diagram - http://www.animations.physics.unsw.edu.au/jw/electricmotors.html
    Last edited: Feb 21, 2011
  2. GetDeviceInfo

    Senior Member

    Jun 7, 2009
    apply your left hand rule, as the loop cuts through one pole, current flows in one direction, as it cuts through the opposite pole, it reverses.