Question
Download Solution PDFSkew is used is IM in order to reduce torque due to
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFIf the harmonic frequencies coincide with the slot frequency due to the harmonics present in the supply voltage, then it causes torque modulation. As a result of it, cogging occurs.
It can be reduced by skewing of the rotor slots, that means the stack of the rotor is arranged in such a way that it angled with the axis of the rotation.
The rotor slots of squirrel cage induction motor are usually not parallel to the shaft but are skewed which
- Reduces humming thus ensuring the quiet running of a motor
- Results in smoother torque curves for different positions of the rotor
- Reduces the magnetic locking of the stator and rotor
- Increases the rotor resistance due to the increased length of the rotor bar conductors
Last updated on Jun 16, 2025
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