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An 8 pole lap connected armature has 960 conductors a flux of 40Wb/pole and a speed of 400rpm. Calculate the EMF generated on open circuit. If the armature were wave connected for 2 circuits at what speed must it be driven to generate 400V.?
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An 8 pole lap connected armature has 960 conductors a flux of 40Wb/pol...
Calculation of EMF generated on open circuit
Given,
Number of poles (P) = 8
Number of conductors (N) = 960
Flux (Φ) = 40 Wb/pole
Speed (N) = 400 rpm
We know that the EMF generated on open circuit is given by the formula:
EMF = (ΦPN)/60A
where A is the number of parallel paths.
Since the armature is lap-connected, A = P/2 = 4 (as there are 4 parallel paths).
Substituting the given values, we get:
EMF = (40 x 8 x 960)/60 x 4
EMF = 768V
Therefore, the EMF generated on open circuit is 768V.
Calculation of speed required for generating 400V with wave connection
If the armature were wave connected for 2 circuits, then A = 2.
We know that the EMF generated on open circuit is directly proportional to the speed of the armature. Hence, the formula for the EMF can be written as:
EMF = KΦPN
where K is the constant of proportionality.
If the speed is increased to N' rpm, then the new EMF can be given as:
EMF' = KΦPN'
Since the armature is now wave-connected, A = 2. Hence, the new formula for the EMF can be written as:
EMF' = (ΦPN')/60A
Equating the two expressions for EMF, we get:
KΦPN' = (ΦPN')/60A
Simplifying the above expression, we get:
N' = (EMF' x 60A)/(ΦPK)
Substituting the given values, we get:
N' = (400 x 60 x 2)/(40 x 8)
N' = 3000 rpm
Therefore, the speed required for generating 400V with wave connection is 3000 rpm.
Given,
Number of poles (P) = 8
Number of conductors (N) = 960
Flux (Φ) = 40 Wb/pole
Speed (N) = 400 rpm
We know that the EMF generated on open circuit is given by the formula:
EMF = (ΦPN)/60A
where A is the number of parallel paths.
Since the armature is lap-connected, A = P/2 = 4 (as there are 4 parallel paths).
Substituting the given values, we get:
EMF = (40 x 8 x 960)/60 x 4
EMF = 768V
Therefore, the EMF generated on open circuit is 768V.
Calculation of speed required for generating 400V with wave connection
If the armature were wave connected for 2 circuits, then A = 2.
We know that the EMF generated on open circuit is directly proportional to the speed of the armature. Hence, the formula for the EMF can be written as:
EMF = KΦPN
where K is the constant of proportionality.
If the speed is increased to N' rpm, then the new EMF can be given as:
EMF' = KΦPN'
Since the armature is now wave-connected, A = 2. Hence, the new formula for the EMF can be written as:
EMF' = (ΦPN')/60A
Equating the two expressions for EMF, we get:
KΦPN' = (ΦPN')/60A
Simplifying the above expression, we get:
N' = (EMF' x 60A)/(ΦPK)
Substituting the given values, we get:
N' = (400 x 60 x 2)/(40 x 8)
N' = 3000 rpm
Therefore, the speed required for generating 400V with wave connection is 3000 rpm.
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An 8 pole lap connected armature has 960 conductors a flux of 40Wb/pole and a speed of 400rpm. Calculate the EMF generated on open circuit. If the armature were wave connected for 2 circuits at what speed must it be driven to generate 400V.?
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An 8 pole lap connected armature has 960 conductors a flux of 40Wb/pole and a speed of 400rpm. Calculate the EMF generated on open circuit. If the armature were wave connected for 2 circuits at what speed must it be driven to generate 400V.? 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 An 8 pole lap connected armature has 960 conductors a flux of 40Wb/pole and a speed of 400rpm. Calculate the EMF generated on open circuit. If the armature were wave connected for 2 circuits at what speed must it be driven to generate 400V.? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for An 8 pole lap connected armature has 960 conductors a flux of 40Wb/pole and a speed of 400rpm. Calculate the EMF generated on open circuit. If the armature were wave connected for 2 circuits at what speed must it be driven to generate 400V.?.
An 8 pole lap connected armature has 960 conductors a flux of 40Wb/pole and a speed of 400rpm. Calculate the EMF generated on open circuit. If the armature were wave connected for 2 circuits at what speed must it be driven to generate 400V.? 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 An 8 pole lap connected armature has 960 conductors a flux of 40Wb/pole and a speed of 400rpm. Calculate the EMF generated on open circuit. If the armature were wave connected for 2 circuits at what speed must it be driven to generate 400V.? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for An 8 pole lap connected armature has 960 conductors a flux of 40Wb/pole and a speed of 400rpm. Calculate the EMF generated on open circuit. If the armature were wave connected for 2 circuits at what speed must it be driven to generate 400V.?.
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