On a modern silicon controlled rectified...

Question 1 / 2066636eed28f7522a1c51d7d2

Question 1 of 2066636eed28f7522a1c51d7d2

On a modern silicon controlled rectified diesel-electric drive system, what are the characteristics of the main propulsion generators?

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Question 1 of 20

66636eed28f7522a1c51d7d2

On a modern silicon controlled rectified diesel-electric drive system, what are the characteristics of the main propulsion generators?

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🔍 Key Concepts

• Silicon controlled rectifier (SCR) as a controlled rectifier for propulsion systems • Difference between AC generators (alternators) and DC generators on modern ships • Why diesel engines for propulsion generators are usually run at constant speed and frequency

💭 Think About

• Ask yourself: does the SCR unit itself create the variable voltage/controlled output, or must the generator speed and frequency vary to do that? • Consider what type of generator (AC or DC) is most common in modern large diesel-electric plants before the power goes into rectifiers and drives. • Think about whether shipboard power distribution (and most auxiliaries) prefer constant or variable frequency and voltage from the main generators.

✅ Before You Answer

• Verify whether SCRs require an AC input to control and convert to DC for the propulsion motors. • Check if modern ship service and propulsion generators are normally operated at constant speed and constant frequency for system compatibility. • Confirm whether a variable voltage for propulsion is usually produced by the generator itself or by the power electronics (SCRs) downstream.

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Question 1 of 20

On a modern silicon controlled rectified diesel-electric drive system, what are the characteristics of the main propulsion generators?

The generators are of the alternating current type running at constant frequency and delivering a constant voltage.

The generators are of the direct current type running at constant speed and delivering a constant voltage.

The generators are of the alternating current type running at variable frequency and delivering a variable voltage.

The generators are of the direct current type running at variable speed and delivering a variable voltage.

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Question 1 / 2066636eed28f7522a1c51d7d2

Question 1 of 2066636eed28f7522a1c51d7d2

On a modern silicon controlled rectified diesel-electric drive system, what are the characteristics of the main propulsion generators?

Back

Question 1 of 20

66636eed28f7522a1c51d7d2

On a modern silicon controlled rectified diesel-electric drive system, what are the characteristics of the main propulsion generators?

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

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