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Generally the no-load losses of an electrical machine is represented in its equivalent circuit by a
- a)parallel resistance with a low value
- b)series resistance with a low value
- c)parallel resistance with a high value
- d)series resistance with a high value
Correct answer is option 'A'. Can you explain this answer?
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Verified Answer
Generally the no-load losses of an electrical machine is represented i...
No-load losses (essentially core losses not F & W losses) are low and depend upon the applied voltage in an induction machine.
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Generally the no-load losses of an electrical machine is represented i...
No-Load Losses in Electrical Machines
No-load losses are the losses that occur in an electrical machine when it is not loaded. These losses include core losses, friction and windage losses, and sometimes stray losses.
Equivalent Circuit Representation
The equivalent circuit of an electrical machine is a simplified representation of its electrical characteristics. The no-load losses are represented in the equivalent circuit by a parallel resistance with a low value.
Explanation
The parallel resistance with a low value represents the core losses of the machine. These losses are caused by the hysteresis and eddy current losses in the core material. The value of this resistance is small because the core losses are relatively small compared to the other losses in the machine.
The series resistance with a high value is not used to represent the no-load losses because it represents the copper losses in the machine, which are relatively large when the machine is loaded. The parallel resistance with a high value is also not used because it would represent a short circuit, which is not the case in a no-load condition.
Conclusion
In conclusion, the equivalent circuit of an electrical machine represents the no-load losses by a parallel resistance with a low value. This resistance represents the core losses of the machine, which are relatively small compared to the other losses in the machine.
No-load losses are the losses that occur in an electrical machine when it is not loaded. These losses include core losses, friction and windage losses, and sometimes stray losses.
Equivalent Circuit Representation
The equivalent circuit of an electrical machine is a simplified representation of its electrical characteristics. The no-load losses are represented in the equivalent circuit by a parallel resistance with a low value.
Explanation
The parallel resistance with a low value represents the core losses of the machine. These losses are caused by the hysteresis and eddy current losses in the core material. The value of this resistance is small because the core losses are relatively small compared to the other losses in the machine.
The series resistance with a high value is not used to represent the no-load losses because it represents the copper losses in the machine, which are relatively large when the machine is loaded. The parallel resistance with a high value is also not used because it would represent a short circuit, which is not the case in a no-load condition.
Conclusion
In conclusion, the equivalent circuit of an electrical machine represents the no-load losses by a parallel resistance with a low value. This resistance represents the core losses of the machine, which are relatively small compared to the other losses in the machine.
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Community Answer
Generally the no-load losses of an electrical machine is represented i...
YOur answer is wrong , Right answer is c , Parallel resistance with high value , High value because Mag current , or else core loss component is low , and if you put low resistance in parallel it will take huge current even when it is in running condition . Point to note is armature already has a low resistance , so for core component you are using lower value , which would be even lower then armature resistance , thats just a nearly short circuit . It won't represent electrical machine at all . So correct option is C , it has given A in many sites which is wrong .
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Generally the no-load losses of an electrical machine is represented in its equivalent circuit by aa)parallel resistance with a low valueb)series resistance with a low valuec)parallel resistance with a high valued)series resistance with a high valueCorrect answer is option 'A'. Can you explain this answer?
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