Which motor is normally free from mechanical and magnetic vibrations ?
Correct answer: C. Hysteresis motor
- A. Split phase motor
- B. Universal motor
- C. Hysteresis motor
- D. Shaded pole motor
Explanation
The hysteresis motor has a smooth, non-toothed rotor and produces nearly uniform torque, so it operates with exceptionally low mechanical and magnetic vibration. The other listed motors generally have greater torque pulsation or magnetic vibration.
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