How is the main propeller shaft rotation of...

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Question 1 of 2066636eed28f7522a1c51d767

How is the main propeller shaft rotation of a conventional AC turbo-electric drive normally reversed? (Assume that no converters or inverters are used.)

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Question 1 of 20

66636eed28f7522a1c51d767

How is the main propeller shaft rotation of a conventional AC turbo-electric drive normally reversed? (Assume that no converters or inverters are used.)

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🔍 Key Concepts

• AC propulsion motor behavior with fixed-frequency power • How direction of rotation is changed in three-phase AC motors • Difference between field polarity changes and phase sequence changes in AC systems

💭 Think About

• In a three-phase AC motor supplied directly from an AC generator (no converters/inverters), what electrical change will make the rotating magnetic field spin in the opposite direction? • Which of the listed actions would actually be practical and commonly used on ships with conventional AC turbo-electric drives? • Think about whether changing the turbine’s direction or the generator/motor field polarity is normal or even feasible in real operation.

✅ Before You Answer

• Verify which choice directly affects the rotating magnetic field direction in a three-phase AC motor. • Check whether reversing turbine rotation is common practice in marine turbo-electric plants. • Distinguish between changing field polarity (DC-like thinking) and changing phase sequence (three-phase AC concept).

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Question 1 of 2066636eed28f7522a1c51d767

How is the main propeller shaft rotation of a conventional AC turbo-electric drive normally reversed? (Assume that no converters or inverters are used.)

Back

Question 1 of 20

66636eed28f7522a1c51d767

How is the main propeller shaft rotation of a conventional AC turbo-electric drive normally reversed? (Assume that no converters or inverters are used.)

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?

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