Physics · Synchronous Motors
Why is a standard synchronous motor NOT inherently self-starting under normal conditions?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1The supply frequency is too low to create rotation
- 2The stator produces only a static magnetic field
- 3The pulsating torque rapidly alternates direction before the heavy rotor can accelerate, resulting in zero average starting torque✓
- 4The rotor cannot generate a magnetic field when at rest
Correct answer
The pulsating torque rapidly alternates direction before the heavy rotor can accelerate, resulting in zero average starting torque
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