HNC - Motor Start up Speed

Discussion in 'Homework Help' started by lee1804, Dec 6, 2009.

  1. lee1804

    Thread Starter New Member

    Dec 2, 2009
    Hello all,

    Stuck on the last question for an assingment, which has really stumped me as i have recently been ill so missed a few lessons!

    "A 3 Phase 6 pole 50Hz induction motor has rotor resistance per phase of 0.2 ohms and a reactance 0.9 ohms per phase. At what speed will it produce maximum torque. Also, what resistance must be added at start up and 600 revs/min.

    :/ Any help is much appreciated as i am not even sure how to start to answer this question!!

    Thanks Lee