1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Expressing Impedance in Polar and Complex Number form HELP

  1. Oct 28, 2009 #1
    Expressing Impedance in Polar and Complex Number form HELP!!!

    1. The problem statement, all variables and given/known data

    A Single Pahse, 50Hz, A.C. Generator is to be used to supply two single phase A.C. induction motors in parallel.
    The no-load terminal voltage of the generator is 400V. And it has an output resistance of 0.2ohms and an output inductance of 1mH.
    Both motors will be running at 80% of their full load rating
    Motor 1 has a full load output rating of 2.5Kw with an efficiency of 70% and at 80% of full load runs with a Power Factor of 0.8 lagging
    Motor 2 has a full load outout rating of 4.2Kw with an efficiency of 85% and at 80% of full load runs with a Power Factor of 0.75 lagging

    The impedance of the supply cable is negligible

    Question:
    Express the motor loads as impedance in polar and complex number form assuming the motors are operating at 400V?

    Please Help i Dont Know where to start!!


    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?



Similar Discussions: Expressing Impedance in Polar and Complex Number form HELP
Loading...