The prime mover of an AC two pole main...

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Question 1 of 205eccefa4bacbc34ba4d485bf

The prime mover of an AC two pole main propulsion generator drives the generator at 3600 RPM. If the main propulsion motor has 80 poles, what will be the propeller speed?

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5eccefa4bacbc34ba4d485bf

The prime mover of an AC two pole main propulsion generator drives the generator at 3600 RPM. If the main propulsion motor has 80 poles, what will be the propeller speed?

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🔍 Key Concepts

• Synchronous speed formula for AC machines: Ns = 120 × f / P • Relationship between prime mover speed, generator poles, and system frequency • How synchronous speed changes when the number of poles increases from generator to motor

💭 Think About

• First, use the 2-pole generator speed (3600 RPM) to figure out the electrical frequency of the system. • Then, apply that same frequency to an 80-pole motor to find its synchronous speed in RPM. • Compare the calculated motor speed with the answer choices and pick the closest correct value.

✅ Before You Answer

• Be sure to use the same frequency for both generator and motor since they are on the same system. • Check that you are using the correct number of poles for each machine in the formula. • Confirm that you’ve converted and simplified the formula correctly so that RPM units are consistent.

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Question 1 of 205eccefa4bacbc34ba4d485bf

The prime mover of an AC two pole main propulsion generator drives the generator at 3600 RPM. If the main propulsion motor has 80 poles, what will be the propeller speed?

Back

Question 1 of 20

5eccefa4bacbc34ba4d485bf

The prime mover of an AC two pole main propulsion generator drives the generator at 3600 RPM. If the main propulsion motor has 80 poles, what will be the propeller speed?

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