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  1. Zhk1983

    Wave winding slip ring motor

    Wave winding in slip ring rotor What will be practical difficulty in using short pitch coil in 3 phase wave wound slip ring rotor ?.
  2. Zhk1983

    Aluminium rotor bar in squirrel cage induction motors

    Dear All Thanks for your replies . As i have heard the coefficient of linear expansion of aluminium is more than copper , hence the chances of fatigue failure is more in case of aluminium during operation .It is correct.We are using fabricated aluminium bar and short circuit ring rotor.
  3. Zhk1983

    Aluminium rotor bar in squirrel cage induction motors

    Dear All Can anyone tell me disadvantages of using aluminium material instead of copper in rotor of squirrel cage induction motor. Cost is one factor any other technical factor we should look.
  4. Zhk1983

    Polarization index in MV motors and genrators

    Thanks everyone for your valuable inputs.
  5. Zhk1983

    Polarization index in MV motors and genrators

    As IEEE 43-2000(Cl no 12.2.2) says , If 1 min IR is greater than 5000Mega-Ohm then Polarization index may or may not be indication of insulation condition. Can any one elaborate what is phenomena behind this. regards Zafar

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