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Maximum efficiency of D. C. Machines occurs when:
- a)Machine is running at no load
- b)Core gets fully saturated
- c)Constant losses = losses proportional to square of current
- d)Variable losses = Constant losses
Correct answer is option 'D'. Can you explain this answer?
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Verified Answer
Maximum efficiency of D. C. Machines occurs when:a)Machine is running ...
In DC machines, maximum efficiency occurs when variable losses are equal to constant losses.
Variable losses = Constant losses
Constant losses include windage losses, brush losses, hysteresis losses and eddy current losses.
Variable losses include copper losses in armature winding and field winding.
Variable losses = Constant losses
Constant losses include windage losses, brush losses, hysteresis losses and eddy current losses.
Variable losses include copper losses in armature winding and field winding.
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Maximum efficiency of D. C. Machines occurs when:a)Machine is running ...
Efficiency of D. C. Machines
Efficiency of D. C. Machines is an important parameter to determine its performance. Maximum efficiency occurs when variable losses equal constant losses. Let's break down this statement:
Constant losses = losses proportional to square of current
- Constant losses in a D. C. Machine are mainly due to core losses, which are proportional to the square of the current flowing through the machine.
- These losses are independent of the load on the machine and remain constant.
Variable losses = Constant losses
- Variable losses in a D. C. Machine are mainly due to copper losses, which are proportional to the square of the current flowing through the machine.
- These losses vary depending on the load on the machine and increase as the load increases.
Maximum efficiency
- When variable losses are equal to constant losses, the machine operates at maximum efficiency.
- At this point, the total losses in the machine are minimized, leading to optimal performance.
In conclusion, the maximum efficiency of a D. C. Machine occurs when variable losses are equal to constant losses. This balance ensures that the machine operates at its peak performance level with minimum losses.
Efficiency of D. C. Machines is an important parameter to determine its performance. Maximum efficiency occurs when variable losses equal constant losses. Let's break down this statement:
Constant losses = losses proportional to square of current
- Constant losses in a D. C. Machine are mainly due to core losses, which are proportional to the square of the current flowing through the machine.
- These losses are independent of the load on the machine and remain constant.
Variable losses = Constant losses
- Variable losses in a D. C. Machine are mainly due to copper losses, which are proportional to the square of the current flowing through the machine.
- These losses vary depending on the load on the machine and increase as the load increases.
Maximum efficiency
- When variable losses are equal to constant losses, the machine operates at maximum efficiency.
- At this point, the total losses in the machine are minimized, leading to optimal performance.
In conclusion, the maximum efficiency of a D. C. Machine occurs when variable losses are equal to constant losses. This balance ensures that the machine operates at its peak performance level with minimum losses.
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Maximum efficiency of D. C. Machines occurs when:a)Machine is running at no loadb)Core gets fully saturatedc)Constant losses = losses proportional to square of currentd)Variable losses = Constant lossesCorrect answer is option 'D'. Can you explain this answer?
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