Electrician Red Seal · Question
What is the primary function of the starting capacitor in a single-phase AC induction motor?
The starting capacitor creates a phase displacement between the current in the starting winding and the main winding. This phase difference produces a rotating
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Question: What is the primary function of the starting capacitor in a single-phase AC induction motor?
Answer options:
- To improve the motor's power factor during operation.
- To reduce starting current to prevent nuisance tripping. ✅ To create a phase shift in the starting winding current to establish a rotating magnetic field.
- To provide DC excitation to the rotor windings.
Correct answer: To create a phase shift in the starting winding current to establish a rotating magnetic field.
Explanation: The starting capacitor creates a phase displacement between the current in the starting winding and the main winding. This phase difference produces a rotating magnetic field necessary to give the single-phase motor initial torque and allow it to start rotating.
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