Electrical Engineering (EE) Exam > Electrical Engineering (EE) Questions > During constant torque operation of a.c. elec...
Start Learning for Free
During constant torque operation of a.c. electrical machines
- a)supply voltage or frequency has to remain constant
- b)speed has to remain constant
- c)power has to remain constant
- d)both supply voltage and supply frequency has to remain constant
Correct answer is option 'D'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Most Upvoted Answer
During constant torque operation of a.c. electrical machinesa)supply v...
The Torque vs Speed characteristics of the V/f controlled Induction motor:
- Whenever frequency is varied in order to control speed, the terminal voltage is also varied so as to maintain the V/f ratio constant.
- Thus by maintaining a constant V/f ratio, the maximum torque of the motor becomes constant for changing speed.
Formula:
The induced emf is
Ф = air-gap flux
Bmax = Maximum flux density
f = Supply frequency
n= No.of turns
BratedBrated size 12{B rSub { size 8{ ital "rated"} } } {}" id="MathJax-Element-49-Frame" role="presentation" style="display: inline; position: relative;" tabindex="0">
The Torque vs Speed characteristics of the V/f controlled Induction motor is shown below.
Fig: BratedBrated size 12{B rSub { size 8{ ital "rated"} } } {}" id="MathJax-Element-49-Frame" role="presentation" style="display: inline; font-size: 14px; position: relative;" tabindex="0">The Torque vs Speed characteristics of the V/f controlled Induction motor
Thus maintaining the V/f ratio constant helps us to maintain a constant maximum torque while controlling the speed.
Free Test
FREE
| Start Free Test |
Community Answer
During constant torque operation of a.c. electrical machinesa)supply v...
Constant Torque Operation of A.C. Electrical Machines
Constant torque operation of A.C. electrical machines refers to a situation where the torque produced by the machine remains constant regardless of the speed at which the machine is operating. In such cases, it is important to ensure that both the supply voltage and supply frequency remain constant in order to maintain the desired torque output.
Explanation:
Supply Voltage and Frequency
- In A.C. electrical machines, the torque produced is directly proportional to the product of the magnetic field strength and the current flowing through the machine.
- The magnetic field strength is determined by the supply voltage, while the current flowing through the machine is influenced by the supply frequency.
- Therefore, in order to maintain a constant torque output during operation, both the supply voltage and supply frequency must remain constant.
Impact on Speed and Power
- While maintaining constant torque, the speed of the machine may vary depending on the load requirements. However, the torque output remains constant due to the fixed supply voltage and frequency.
- Similarly, the power consumed by the machine may vary with changes in speed, but the torque output remains constant as long as the supply voltage and frequency are held constant.
In conclusion, during constant torque operation of A.C. electrical machines, it is crucial to ensure that both the supply voltage and supply frequency remain constant. This helps to maintain the desired torque output and ensures efficient operation of the machine.
Attention Electrical Engineering (EE) Students!
To make sure you are not studying endlessly, EduRev has designed Electrical Engineering (EE) study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Electrical Engineering (EE).
|
Explore Courses for Electrical Engineering (EE) exam
|
|
Similar Electrical Engineering (EE) Doubts
Top Courses for Electrical Engineering (EE)View all
During constant torque operation of a.c. electrical machinesa)supply voltage or frequency has to remain constantb)speed has to remain constantc)power has to remain constantd)both supply voltage and supply frequency has to remain constantCorrect answer is option 'D'. Can you explain this answer?
Question Description
During constant torque operation of a.c. electrical machinesa)supply voltage or frequency has to remain constantb)speed has to remain constantc)power has to remain constantd)both supply voltage and supply frequency has to remain constantCorrect answer is option 'D'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about During constant torque operation of a.c. electrical machinesa)supply voltage or frequency has to remain constantb)speed has to remain constantc)power has to remain constantd)both supply voltage and supply frequency has to remain constantCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for During constant torque operation of a.c. electrical machinesa)supply voltage or frequency has to remain constantb)speed has to remain constantc)power has to remain constantd)both supply voltage and supply frequency has to remain constantCorrect answer is option 'D'. Can you explain this answer?.
During constant torque operation of a.c. electrical machinesa)supply voltage or frequency has to remain constantb)speed has to remain constantc)power has to remain constantd)both supply voltage and supply frequency has to remain constantCorrect answer is option 'D'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about During constant torque operation of a.c. electrical machinesa)supply voltage or frequency has to remain constantb)speed has to remain constantc)power has to remain constantd)both supply voltage and supply frequency has to remain constantCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for During constant torque operation of a.c. electrical machinesa)supply voltage or frequency has to remain constantb)speed has to remain constantc)power has to remain constantd)both supply voltage and supply frequency has to remain constantCorrect answer is option 'D'. Can you explain this answer?.
Solutions for During constant torque operation of a.c. electrical machinesa)supply voltage or frequency has to remain constantb)speed has to remain constantc)power has to remain constantd)both supply voltage and supply frequency has to remain constantCorrect answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for Electrical Engineering (EE).
Download more important topics, notes, lectures and mock test series for Electrical Engineering (EE) Exam by signing up for free.
Here you can find the meaning of During constant torque operation of a.c. electrical machinesa)supply voltage or frequency has to remain constantb)speed has to remain constantc)power has to remain constantd)both supply voltage and supply frequency has to remain constantCorrect answer is option 'D'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
During constant torque operation of a.c. electrical machinesa)supply voltage or frequency has to remain constantb)speed has to remain constantc)power has to remain constantd)both supply voltage and supply frequency has to remain constantCorrect answer is option 'D'. Can you explain this answer?, a detailed solution for During constant torque operation of a.c. electrical machinesa)supply voltage or frequency has to remain constantb)speed has to remain constantc)power has to remain constantd)both supply voltage and supply frequency has to remain constantCorrect answer is option 'D'. Can you explain this answer? has been provided alongside types of During constant torque operation of a.c. electrical machinesa)supply voltage or frequency has to remain constantb)speed has to remain constantc)power has to remain constantd)both supply voltage and supply frequency has to remain constantCorrect answer is option 'D'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice During constant torque operation of a.c. electrical machinesa)supply voltage or frequency has to remain constantb)speed has to remain constantc)power has to remain constantd)both supply voltage and supply frequency has to remain constantCorrect answer is option 'D'. Can you explain this answer? tests, examples and also practice Electrical Engineering (EE) tests.
|
|
Explore Courses for Electrical Engineering (EE) exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup