The Speed of 60 Hz, 4 Pole Synchronous Motor is | Synchronous Motor MCQ#1

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The speed of rotation of 60 Hz, 4 Pole Synchronous Motor is:

  1. 900 RPM
  2. 1800 RPM
  3. 3600 RPM
  4. 7200 RPM

Correct answer: 2. 1800 RPM

Explanation: Formula for speed of rotation in Synchronous motor is:

Speed = (120 * f)/P

Where f = frequency and P = Number of poles

Speed = (120 * 60)/4 = 1800 RPM

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