Explain why small DC motors can be connected directly across the line for starting.

Question

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Answer 1

Question

Chapter 45, Problem 1SQ

To determine

Explain why small DC motors can be connected directly across the line for starting.

Expert Solution & Answer

Explanation of Solution

Small DC motors can be started by connecting directly across the line with the help of a switch or a connector. It does not cause any damage because the motor can attain full speed very quickly due to small amount of rotor’s inertia and friction. Also a high starting current will decrease very quickly due to the fast increase in the counter-electromotive force.

Conclusion:

Thus, a motor that can be connected directly across a line for starting is explained.

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Problem a. (i) Sketch the ideal power curve of the turbine with the following characteristics: • rated speed is 14 m/s ⚫rated power is 1.25 MW ⚫ cut-in speed is 5 m/s ⚫furling or cut-out speed is 20 m/s (ii) Given part (i), calculate the energy produced in one day if the wind blows continuously between 15 and 20 m/s all day (iii) Can the energy produced in one year be determined if you are told that the average wind speed is 14 m/s? Explain why.

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Answer 2

Question

Chapter 45, Problem 1SQ

To determine

Explain why small DC motors can be connected directly across the line for starting.

Expert Solution & Answer

Explanation of Solution

Small DC motors can be started by connecting directly across the line with the help of a switch or a connector. It does not cause any damage because the motor can attain full speed very quickly due to small amount of rotor’s inertia and friction. Also a high starting current will decrease very quickly due to the fast increase in the counter-electromotive force.

Conclusion:

Thus, a motor that can be connected directly across a line for starting is explained.

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Answer 3

Question

Chapter 45, Problem 1SQ

To determine

Explain why small DC motors can be connected directly across the line for starting.

Expert Solution & Answer

Explanation of Solution

Small DC motors can be started by connecting directly across the line with the help of a switch or a connector. It does not cause any damage because the motor can attain full speed very quickly due to small amount of rotor’s inertia and friction. Also a high starting current will decrease very quickly due to the fast increase in the counter-electromotive force.

Conclusion:

Thus, a motor that can be connected directly across a line for starting is explained.

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Answer 4

Question

Chapter 45, Problem 1SQ

To determine

Explain why small DC motors can be connected directly across the line for starting.

Expert Solution & Answer

Explanation of Solution

Small DC motors can be started by connecting directly across the line with the help of a switch or a connector. It does not cause any damage because the motor can attain full speed very quickly due to small amount of rotor’s inertia and friction. Also a high starting current will decrease very quickly due to the fast increase in the counter-electromotive force.

Conclusion:

Thus, a motor that can be connected directly across a line for starting is explained.

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Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 5

Chapter 45, Problem 1SQ

To determine

Explain why small DC motors can be connected directly across the line for starting.

Expert Solution & Answer

Explanation of Solution

Small DC motors can be started by connecting directly across the line with the help of a switch or a connector. It does not cause any damage because the motor can attain full speed very quickly due to small amount of rotor’s inertia and friction. Also a high starting current will decrease very quickly due to the fast increase in the counter-electromotive force.

Conclusion:

Thus, a motor that can be connected directly across a line for starting is explained.

Answer 6

Chapter 45, Problem 1SQ

To determine

Explain why small DC motors can be connected directly across the line for starting.

Expert Solution & Answer

Explanation of Solution

Small DC motors can be started by connecting directly across the line with the help of a switch or a connector. It does not cause any damage because the motor can attain full speed very quickly due to small amount of rotor’s inertia and friction. Also a high starting current will decrease very quickly due to the fast increase in the counter-electromotive force.

Conclusion:

Thus, a motor that can be connected directly across a line for starting is explained.

Answer 7

Chapter 45, Problem 1SQ

To determine

Explain why small DC motors can be connected directly across the line for starting.

Answer 8

Expert Solution & Answer

Explanation of Solution

Small DC motors can be started by connecting directly across the line with the help of a switch or a connector. It does not cause any damage because the motor can attain full speed very quickly due to small amount of rotor’s inertia and friction. Also a high starting current will decrease very quickly due to the fast increase in the counter-electromotive force.

Conclusion:

Thus, a motor that can be connected directly across a line for starting is explained.