Electric Motor Control

10th Edition
Publisher: CENGAGE L
ISBN: 9781133702818



Electric Motor Control

10th Edition
Publisher: CENGAGE L
ISBN: 9781133702818
Chapter 45, Problem 1SQ
Textbook Problem

Why may small DC motors be started directly across the line?

To determine

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

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.


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

The Solution to Your Study Problems

Bartleby provides explanations to thousands of textbook problems written by our experts, many with advanced degrees!

Get Started

Additional Engineering Textbook Solutions

Find more solutions based on key concepts
Show solutions add
Determine the speed of a point on the earths surface in ft/s, m/s, mph, km/h. State your assumptions.

Engineering Fundamentals: An Introduction to Engineering (MindTap Course List)

What is accounting entity?

Cornerstones of Financial Accounting

What is the difference between a column constraint and a table constraint?

Database Systems: Design, Implementation, & Management

How is the Internet of Everything different from the Internet of Things?

Principles of Information Systems (MindTap Course List)

What does MCS stand for?

Precision Machining Technology (MindTap Course List)

What is the amount of heat necessary to change the state of a substance called?

Automotive Technology: A Systems Approach (MindTap Course List)

network attached storage (390) a. storage method in which the magnetic particles are aligned horizontally aroun...

Enhanced Discovering Computers 2017 (Shelly Cashman Series) (MindTap Course List)

If your motherboard supports ECC DDR3 memory, can you substitute non-ECC DDR3 memory?

A+ Guide to Hardware (Standalone Book) (MindTap Course List)

Why are some copper alloy cutting tips chrome-plated?

Welding: Principles and Applications (MindTap Course List)

Find all the answers to your study problems with bartleby.
Textbook solutions plus Q&A. Get As ASAP arrow_forward