Delmar's Standard Textbook Of Electricity
7th Edition
ISBN: 9781337900348
Author: Stephen L. Herman
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 30, Problem 4RQ
To determine
The two factors which determine the amount of torque developed by a DC motor.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
How do you define ‘back emf’ and speed regulation of a dc motor. Can you explain analytically what happens to the torque and speed of a motor when the flux is varied?
Write an Introduction about DC Motors.
Explain the types of DC generators.
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
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, electrical-engineering and related others by exploring similar questions and additional content below.Similar questions
- Describe the characteristics and principles of operation of AC and DC generators and the features of a range of different types of power stations.arrow_forwardIn your opinion, what happens to the rotor speed and current when mechanical load on an induction motor increases? Barrow_forwardJustify why an electrostatic motor cannot be operated from dc supply.Derive the expression of average torque of this motor when it is suppliedfrom ac sourcearrow_forward
- How the rotating magnetic field is produced. Explain its importance in the operation of an Induction Motors.arrow_forwardA shunt dc motor has armature voltage = 150 V, armature field resistance = 100 2, and armature resistance = 1.6 Q. At a certain torque the motor rotates at 1350 R.P.M and takes a current = 12 A. what will be the load torque?arrow_forwardQ 4. An 8-pole DC generator has 400 armature conductors and a useful flux of 0.05 Wb. What will be the emf generated if it is lap wound and runs at 1,500 rpm? What must be the speed at which it is to be driven to induce the same voltage if it is wave wound? (Ans. 500 V; 375 rpm)arrow_forward
- /What is DC motor? Derive its torque equation.arrow_forwardQ4/B/ What are the principal characteristics of a series DC motor? What are its uses? Core Mcarrow_forwardA shunt dc motor has armature voltage = 150 V, armature field resistance = 100 Q, and armature resistance = 1.6 Q. At a certain torque the motor rotates at 1350 R.P.M and takes a current = 12 A. what will be the load %3D %3D %3D torque?arrow_forward
- Sketch the torque versus speed characteristic for a series-connected dc motor.arrow_forwardthe relation between armature and field currents in a series connected DC motor is O It = If + la O It=la - If O If = laarrow_forwardA dc shunt motor runs at 900 rpm from a 460 V supply when taking an armature current of 25 A. Calculate the speed of which it will run from a 230 V supply when taking an armature current of 15 A. The resistance of the armature circuit is 0.8 ohm. Assume flux per pole at 230 V have to decrease to 75% of its value at 460 Varrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Delmar's Standard Textbook Of ElectricityElectrical EngineeringISBN:9781337900348Author:Stephen L. HermanPublisher:Cengage Learning
Delmar's Standard Textbook Of Electricity
Electrical Engineering
ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Cengage Learning