Which of the following is NOT a characteristic of an unexcited single-phase synchronous motor?
Which of the following is NOT a characteristic of an unexcited single-phase synchronous motor?
Right Answer is:
Requires DC excitation for the rotor
SOLUTION
Single-phase induction motors built with a variable air-gap reluctance and with having no dc supply on the rotor are called reluctance motors. Such motors start as induction motors but are pulled into synchronous speed because of the variation in air-gap reluctance.