While starting a synchronous motor by induction motor action, field winding is usually_____________?
Correct answer: B. short-circuited by low resistance
- A. connected to D.C. supply
- B. short-circuited by low resistance
- C. kept open-circuited
- D. none of the above
Explanation
During induction starting, the field winding is not supplied with DC; it is closed through a low-impedance path to prevent dangerously high induced voltage. The damper cage then provides the starting torque.
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