Which of the following motors is non-self starting ?
Correct answer: B. synchronous motor
- A. D.C. series motor
- B. synchronous motor
- C. Squirrel cage induction motor
- D. Wound round induction motor
Explanation
A synchronous motor produces no average starting torque because its stator field rotates past the stationary rotor too rapidly to establish continuous acceleration. It therefore needs an auxiliary starting method, unlike the induction motors listed.
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