Physics · Electromagnetism and Electrical Machines
Consider the following statements about damper windings used to start a synchronous motor: a) When a motor is overloaded it does not stop. b) A synchronous motor is made self-starting by providing a damper winding. c) Damper windings consist of short-circuited copper bars embedded in the face of the field poles. d) Since damper winding resistance is high, it takes a small current from the supply mains. Choose the correct combination of statements.
- 1Only a, b and c are true.
- 2All a, b, c, and d are true.
- 3Both b and c are true.✓
- 4Both b and d are true.
Correct answer
Both b and c are true.
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