🔍 Key Concepts

• Construction of synchronous motors – stator, rotor, field windings, and any additional (damper) windings • Difference between starting characteristics of induction motors vs. synchronous motors • Role of damper (squirrel‑cage) windings in motor operation, especially during starting and transient conditions

💭 Think About

• Think about how a synchronous motor behaves at standstill: can it develop starting torque by itself from DC field excitation alone? • Which type of motor uses a squirrel‑cage rotor as its main way to produce torque, and how might that idea be adapted in a synchronous motor? • Which choice describes a function that happens specifically during starting or transient speed changes, rather than during normal steady‑state synchronous operation?

✅ Before You Answer

• Verify which option directly relates to starting torque or bringing the rotor up to synchronous speed • Check whether squirrel‑cage (damper) windings are normally used for power factor correction or if that’s handled in some other way (e.g., field excitation) • Confirm that the purpose of these windings is not mainly about mechanical balance or insulation/arcing, but about the motor’s electrical/torque behavior during startup and speed changes