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AA 220volt dc shunt motor has armature resistance of 0.5 ohm and take armature current of 40amp at full load to rise the speed by 50% if develop torque is constant the main to be reduce will be ?
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AA 220volt dc shunt motor has armature resistance of 0.5 ohm and take ...
Analysis of the Problem:
Armature Resistance:
- Armature resistance of the DC shunt motor is given as 0.5 ohm.
- Armature current at full load is 40A.
Speed Increase Requirement:
- The speed needs to be increased by 50%.
- The developed torque is constant.
Reduction in Main Voltage:
Calculations:
- The armature current at full load is 40A.
- To increase the speed by 50%, the new armature current required can be calculated as follows:
New Armature Current = 40A + (50/100) * 40A
= 40A + 20A
= 60A
- The voltage drop across the armature resistance is given by:
Voltage Drop = Armature Current * Armature Resistance
= 60A * 0.5 ohm
= 30V
- The main voltage needs to be reduced by the voltage drop across the armature resistance to maintain the same torque with the increased speed. Hence, the main voltage needs to be reduced by 30V.
Therefore, to rise the speed of the DC shunt motor by 50% while keeping the torque constant, the main voltage needs to be reduced by 30V.
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AA 220volt dc shunt motor has armature resistance of 0.5 ohm and take armature current of 40amp at full load to rise the speed by 50% if develop torque is constant the main to be reduce will be ?
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AA 220volt dc shunt motor has armature resistance of 0.5 ohm and take armature current of 40amp at full load to rise the speed by 50% if develop torque is constant the main to be reduce will be ? for Railways 2024 is part of Railways preparation. The Question and answers have been prepared according to the Railways exam syllabus. Information about AA 220volt dc shunt motor has armature resistance of 0.5 ohm and take armature current of 40amp at full load to rise the speed by 50% if develop torque is constant the main to be reduce will be ? covers all topics & solutions for Railways 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for AA 220volt dc shunt motor has armature resistance of 0.5 ohm and take armature current of 40amp at full load to rise the speed by 50% if develop torque is constant the main to be reduce will be ?.
AA 220volt dc shunt motor has armature resistance of 0.5 ohm and take armature current of 40amp at full load to rise the speed by 50% if develop torque is constant the main to be reduce will be ? for Railways 2024 is part of Railways preparation. The Question and answers have been prepared according to the Railways exam syllabus. Information about AA 220volt dc shunt motor has armature resistance of 0.5 ohm and take armature current of 40amp at full load to rise the speed by 50% if develop torque is constant the main to be reduce will be ? covers all topics & solutions for Railways 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for AA 220volt dc shunt motor has armature resistance of 0.5 ohm and take armature current of 40amp at full load to rise the speed by 50% if develop torque is constant the main to be reduce will be ?.
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