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A 4 pole induction machine is working as an induction generator. The generator supply frequency is 60 Hz. The rotor current frequency is 5 Hz. The mechanical speed of the rotor in RPM is
- a)1350
- b)1650
- c)1950
- d)2250
Correct answer is option 'C'. Can you explain this answer?
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Most Upvoted Answer
A 4 pole induction machine is working as an induction generator. The g...
When 3-ϕ induction machine working as an induction generator, then
Slip (s) =
Where,
Ns = Synchronous speed
Nr = Rotor speed
Frequency of rotor current = s × f
Where s is the slip
f is the supply frequency
Slip (s) =
Where,
Ns = Synchronous speed
Nr = Rotor speed
Frequency of rotor current = s × f
Where s is the slip
f is the supply frequency
Calculation:
Given that,
Supply frequency (fs) = 60 Hz
Rotor current frequency (fr) = 5 Hz
Number of poles = 4
Synchronous speed,
We know that,
fr = (s) fs
⇒ 5 = (s) (60)
⇒ s = 1/12
To work as an induction generator, rotor speed should be slip speed greater than synchronous speed, therefore
⇒ Nr = 1950 rpm
Given that,
Supply frequency (fs) = 60 Hz
Rotor current frequency (fr) = 5 Hz
Number of poles = 4
Synchronous speed,
We know that,
fr = (s) fs
⇒ 5 = (s) (60)
⇒ s = 1/12
To work as an induction generator, rotor speed should be slip speed greater than synchronous speed, therefore
⇒ Nr = 1950 rpm
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Community Answer
A 4 pole induction machine is working as an induction generator. The g...
When 3-ϕ induction machine working as an induction generator, then
Slip (s) =
Where,
Ns = Synchronous speed
Nr = Rotor speed
Frequency of rotor current = s × f
Where s is the slip
f is the supply frequency
Slip (s) =
Where,
Ns = Synchronous speed
Nr = Rotor speed
Frequency of rotor current = s × f
Where s is the slip
f is the supply frequency
Calculation:
Given that,
Supply frequency (fs) = 60 Hz
Rotor current frequency (fr) = 5 Hz
Number of poles = 4
Synchronous speed,
We know that,
fr = (s) fs
⇒ 5 = (s) (60)
⇒ s = 1/12
To work as an induction generator, rotor speed should be slip speed greater than synchronous speed, therefore
⇒ Nr = 1950 rpm
Given that,
Supply frequency (fs) = 60 Hz
Rotor current frequency (fr) = 5 Hz
Number of poles = 4
Synchronous speed,
We know that,
fr = (s) fs
⇒ 5 = (s) (60)
⇒ s = 1/12
To work as an induction generator, rotor speed should be slip speed greater than synchronous speed, therefore
⇒ Nr = 1950 rpm
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A 4 pole induction machine is working as an induction generator. The generator supply frequency is 60 Hz. The rotor current frequency is 5 Hz. The mechanical speed of the rotor in RPM isa)1350b)1650c)1950d)2250Correct answer is option 'C'. Can you explain this answer?
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A 4 pole induction machine is working as an induction generator. The generator supply frequency is 60 Hz. The rotor current frequency is 5 Hz. The mechanical speed of the rotor in RPM isa)1350b)1650c)1950d)2250Correct answer is option 'C'. 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 A 4 pole induction machine is working as an induction generator. The generator supply frequency is 60 Hz. The rotor current frequency is 5 Hz. The mechanical speed of the rotor in RPM isa)1350b)1650c)1950d)2250Correct answer is option 'C'. 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 A 4 pole induction machine is working as an induction generator. The generator supply frequency is 60 Hz. The rotor current frequency is 5 Hz. The mechanical speed of the rotor in RPM isa)1350b)1650c)1950d)2250Correct answer is option 'C'. Can you explain this answer?.
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