How is the direction of propeller shaft...

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Question 1 of 205eccefa4bacbc34ba4d485c9

How is the direction of propeller shaft rotation changed when directly coupled to an AC synchronous motor when driven by a variable frequency alternator in an AC turbo-electric drive system?

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5eccefa4bacbc34ba4d485c9

How is the direction of propeller shaft rotation changed when directly coupled to an AC synchronous motor when driven by a variable frequency alternator in an AC turbo-electric drive system?

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🔍 Key Concepts

• AC synchronous motor behavior in relation to supply frequency and phase sequence • How phase sequence affects the direction of rotation of three-phase motors • Difference between changing polarity vs. changing phase sequence in AC systems

💭 Think About

• Think about what actually determines the direction of rotation of a three-phase AC synchronous motor: is it polarity, phase sequence, or mechanical input? • In a turbo-electric drive, the steam turbine is not mechanically connected to the shaft. How does that fact affect whether reversing the turbine’s rotation would reverse the propeller? • Consider how electricians reverse the direction of a three‑phase motor in practice. What do they physically change in the wiring?

✅ Before You Answer

• Recall that for a three-phase AC synchronous motor, direction of rotation is tied to the order in which the phases reach their peak (phase sequence). • Verify whether polarity reversal is meaningful in a balanced three-phase AC system the same way it is in DC circuits. • Confirm that in a turbo‑electric plant, the turbine only drives the generator, and the propeller shaft is driven by the motor, not directly by the turbine.

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Question 1 of 205eccefa4bacbc34ba4d485c9

How is the direction of propeller shaft rotation changed when directly coupled to an AC synchronous motor when driven by a variable frequency alternator in an AC turbo-electric drive system?

Back

Question 1 of 20

5eccefa4bacbc34ba4d485c9

How is the direction of propeller shaft rotation changed when directly coupled to an AC synchronous motor when driven by a variable frequency alternator in an AC turbo-electric drive system?

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