Delmar's Standard Textbook Of Electricity
7th Edition
ISBN: 9781337900348
Author: Stephen L. Herman
Publisher: Cengage Learning
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Question
Chapter 30, Problem 4RQ
To determine
The two factors which determine the amount of torque developed by a DC motor.
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Chapter 30 Solutions
Delmar's Standard Textbook Of Electricity
Ch. 30 - Prob. 1RQCh. 30 - Prob. 2RQCh. 30 - Prob. 3RQCh. 30 - Prob. 4RQCh. 30 - What type of motor is known as a constant-speed...Ch. 30 - What is CEMF?Ch. 30 - Prob. 7RQCh. 30 - Prob. 8RQCh. 30 - Prob. 9RQCh. 30 - What type of motor should never be operated at no...
Ch. 30 - Prob. 11RQCh. 30 - What is the most common way of changing the...Ch. 30 - Prob. 13RQCh. 30 - Prob. 14RQCh. 30 - What device is used to disconnect power to the...Ch. 30 - Prob. 16RQCh. 30 - Who was the first person to establish a...Ch. 30 - One horsepower is equal to how many W?Ch. 30 - A motor is operating a load that requires a torque...Ch. 30 - The motor in Question 19 is connected to a 250-VDC...Ch. 30 - Prob. 1PA
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- Armature current of D.C. Motor at starting is high/low? Justify your answer What do you meant by rated speed of a DC motor? A pole DC motor takes an armature current of 50 A. The armature has wave connected 500 conductors. The flux per pole is 20mwb. Calculate the gross torque developed by the motor .arrow_forwardWhy is a self-excited (SE) dc motor so called? Explain with the help of any SE dc motor.arrow_forwardSketch the torque versus speed characteristic for a shunt-connected dc motor. What happens to the speed if the machine is lightly loaded and the field winding becomes disconnected?arrow_forward
- 2. What happens if the additional resistance is added in series with armature? 3. What will happen if the field circuit of the DC motor is open circuited while it is running at rated speed? 4. Explain theory of a separately excited DC motor.arrow_forward4. Does the speed of a shunt motor increase or decrease when the armaturecurrent increases? 5. What is the advantage of decreasing the field current of a separately-excited dc motor below its nominal value?arrow_forwardHow universal motor can be run on AC and DC supply ?what are the material used in the universal motor to reduce the losses?arrow_forward
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