What is an advantage of DC motors over AC...

Question 1 / 270705eccefa3bacbc34ba4d4805c

Question 1 of 270705eccefa3bacbc34ba4d4805c

What is an advantage of DC motors over AC motors?

Question 1 of 27070

What is an advantage of DC motors over AC motors?

🔍 Key Concepts

• DC motor speed control methods (varying voltage, field control) • Basic differences between AC induction motors and DC motors • Typical starting methods for AC motors (reduced-voltage starters, star-delta, autotransformer)

💭 Think About

• Which type of motor is generally preferred when you need smooth, wide-range speed control on older or simpler shipboard systems? • Think about how AC motors are normally started on larger installations – can they usually be connected directly across the line without any special starting equipment? • Which option describes a well-known, textbook advantage of DC motors, rather than cost or maintenance claims that may vary in practice?

✅ Before You Answer

• Compare how easily you can vary speed on a basic DC motor versus a basic AC induction motor. • Recall whether large AC motors normally need special starting gear to limit inrush current when starting across the line. • Be cautious of choices about cost and maintenance – those can depend on the specific design and application, not an inherent electrical advantage.

Question 1 of 27070

What is an advantage of DC motors over AC motors?

DC motors are less expensive than AC motors

DC motors require less maintenance than AC motors

DC motors can be started across the line whereas AC motors cannot

DC motors offer a more effective means of controlling speed than AC motors

Question 1 / 270705eccefa3bacbc34ba4d4805c

Question 1 of 270705eccefa3bacbc34ba4d4805c

What is an advantage of DC motors over AC motors?

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Question 1 of 27070

What is an advantage of DC motors over AC motors?