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Which of the statements is/are correct regarding rotating magnetic field production in a 3-phase induction machine?
1) The direction of rotation of resultant flux in the air gap depends upon phase sequence.
2) The resultant flux of constant magnitude is produced in the air gap of the motor.
3) Frequency of rotating magnetic field is not the same as that of the supply frequency
  • a)
    1, 2 & 3
  • b)
    1
  • c)
    1 & 2
  • d)
    2
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
Which of the statements is/are correct regarding rotating magnetic fie...
Concept:
  • If a balanced three-phase voltage is supplied to balanced three-phase windings in the stator of an Induction motor, the resultant flux remains constant in magnitude but rotates at the synchronous speed.
  • Synchronous speed is related to the supply frequency and number of poles, for which the winding (stator) has been designed. This is termed as a rotating magnetic field formed in the air gap of the motor.
Where Ns = Synchronous speed in rpm
f = Supply frequency
P = Number of poles
  • The direction of rotation of resultant flux in the air gap depends upon phase sequence. It rotates from the leading phase to the lagging phase.
  • Frequency of rotating magnetic field is same as that of the supply frequency, while rotor frequency is slip times of supply frequency.
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Which of the statements is/are correct regarding rotating magnetic field production in a 3-phase induction machine?1) The direction of rotation of resultant flux in the air gap depends upon phase sequence.2) The resultant flux of constant magnitude is produced in the air gap of the motor.3) Frequency of rotating magnetic field is not the same as that of the supply frequencya)1, 2 & 3b)1c)1 & 2d)2Correct answer is option 'C'. Can you explain this answer?
Question Description
Which of the statements is/are correct regarding rotating magnetic field production in a 3-phase induction machine?1) The direction of rotation of resultant flux in the air gap depends upon phase sequence.2) The resultant flux of constant magnitude is produced in the air gap of the motor.3) Frequency of rotating magnetic field is not the same as that of the supply frequencya)1, 2 & 3b)1c)1 & 2d)2Correct answer is option 'C'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about Which of the statements is/are correct regarding rotating magnetic field production in a 3-phase induction machine?1) The direction of rotation of resultant flux in the air gap depends upon phase sequence.2) The resultant flux of constant magnitude is produced in the air gap of the motor.3) Frequency of rotating magnetic field is not the same as that of the supply frequencya)1, 2 & 3b)1c)1 & 2d)2Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the statements is/are correct regarding rotating magnetic field production in a 3-phase induction machine?1) The direction of rotation of resultant flux in the air gap depends upon phase sequence.2) The resultant flux of constant magnitude is produced in the air gap of the motor.3) Frequency of rotating magnetic field is not the same as that of the supply frequencya)1, 2 & 3b)1c)1 & 2d)2Correct answer is option 'C'. Can you explain this answer?.
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