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How do I know if a machine has a synchronous or an induction motor?

September 19, 2017 by mintu

DWQA Questions › Category: Induction Motor & Generator › How do I know if a machine has a synchronous or an induction motor?
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mintu asked 5 years ago
1 Answers
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Sanjeev answered 5 years ago

By visual inspection, a synchronous motor is a doubly excited motor, meaning it needs both field and armature excitation. The field windings are excited with DC and the armature windings are excited with AC. So it is a four terminal machine.
An induction motor is a singly excited machine, which has only two terminals and always excited by an AC supply.

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