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The rotor slots are slightly skewed in squirrel cage induction motor in order to

  • The rotor slots are slightly skewed in squirrel cage induction motor in order to prevent cogging effect.
  • Cogging effect is a phenomenon in which the rotor of the induction motor tends to "stick" or "cog" in certain positions as it rotates, resulting in an uneven or jerky motion.
  • This can cause problems with the smooth operation of the motor, particularly at low speeds.
  • By skewing the rotor slots, the magnetic fields produced by the stator windings and the rotor bars are able to interact more smoothly, reducing the cogging effect.
  • Skewing the rotor slots involves slightly angling them relative to the axis of the rotor, which helps to prevent the rotor from getting stuck in any particular position.