AC Induction and three phase power

Discussion in 'Physics' started by zebra1707, Nov 9, 2010.

  1. zebra1707

    Thread Starter New Member

    Nov 9, 2010
    2
    0
    Hi there

    I have asked to explore the advantage of a three-phase power supply in an induction motor. How do these obtain 415 V inputs?

    Breaking it down further to:

    * Explaining how a three-phase motor achieves maximum torque three times
    in the cycle of its rotor.


    * Explaining (briefly) how this leads to higher power than is possible
    for a single phase motor with a voltage supply of 240V.

    Some guidance would be greatly appreciated.

    Cheers
     
  2. kokkie_d

    Active Member

    Jan 12, 2009
    72
    0
    Hi ,

    I am not entirly sure on the question your asking:

    3 phase of 240 volt add them together taking in account the shift of 120 degrees per phase.

    The stator generates a torque based on magnitude and frequency of the suppleid voltage. The voltage generates and magetic field which induces a magnetic field in the rotor which will try to align with the field in the stator. The combined phases of the voltage generate 1 torque.
    The higher power is possible due to efficiency of the motor.
     
  3. zebra1707

    Thread Starter New Member

    Nov 9, 2010
    2
    0
    Thank you for the reply. My apologies for the late post. I think that I have posted this question in the wrong area of the forum.

    You have helped me greatly.

    Cheers
     
Loading...