What causes the rotor of a synchronous motor...

Question 1 / 205eccefa4bacbc34ba4d4822f

Question 1 of 205eccefa4bacbc34ba4d4822f

What causes the rotor of a synchronous motor to operate in synchronism with the rotating field?

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Question 1 of 20

5eccefa4bacbc34ba4d4822f

What causes the rotor of a synchronous motor to operate in synchronism with the rotating field?

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🔍 Key Concepts

• Synchronous motor rotor behavior at steady speed • Difference between induction (asynchronous) and synchronous motor torque production • Role of excitation current and damper (amortisseur) windings

💭 Think About

• Ask yourself: when the rotor is running at exactly synchronous speed, is there any slip to induce rotor current like in an induction motor? So how is torque produced? • What is the purpose of amortisseur (damper) windings during start-up versus during normal synchronous running? • How does DC excitation in the rotor interact with the rotating magnetic field of the stator at synchronous speed?

✅ Before You Answer

• Verify which option actually explains how continuous torque is produced once the rotor is at synchronous speed, not how it is started. • Check whether slip exists in a perfectly synchronous motor under steady operation and whether torque can depend on slip in that condition. • Identify the function of amortisseur (damper) windings: are they the main cause of synchronous running, or mainly for starting and damping oscillations?

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Question 1 of 20

What causes the rotor of a synchronous motor to operate in synchronism with the rotating field?

the stator flux rotates in the opposite direction

the field strength varies directly with rotor slip

the amortisseur (damper) windings

the rotor is magnetically locked into step with the rotating magnetic field by the excitation current

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Question 1 / 205eccefa4bacbc34ba4d4822f

Question 1 of 205eccefa4bacbc34ba4d4822f

What causes the rotor of a synchronous motor to operate in synchronism with the rotating field?

Back

Question 1 of 20

5eccefa4bacbc34ba4d4822f

What causes the rotor of a synchronous motor to operate in synchronism with the rotating field?

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

— No credit card needed