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In a doubly excited magnetic systems, the magnetic torques and forces act in such a direction as to tend to ___________
- a)decrease the field energy at constant currents
- b)decrease the field co-energy at constant currents
- c)increase the field energy at constant currents
- d)none of the mentioned
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
In a doubly excited magnetic systems, the magnetic torques and forces ...
Te = ∂Wfld(is,ir,θr)/∂θr = ∂Wfld1(is,ir,θr)/∂θr
fe = ∂Wfld(is,ir,x)/∂x = ∂Wfld1(is,ir,x)/∂x
The positive sign in the formula indicates that force/torque acts in a direction as to tend to increase both field energy and co-energy.
fe = ∂Wfld(is,ir,x)/∂x = ∂Wfld1(is,ir,x)/∂x
The positive sign in the formula indicates that force/torque acts in a direction as to tend to increase both field energy and co-energy.
Most Upvoted Answer
In a doubly excited magnetic systems, the magnetic torques and forces ...
Te = ∂Wfld(is,ir,θr)/∂θr = ∂Wfld1(is,ir,θr)/∂θr
fe = ∂Wfld(is,ir,x)/∂x = ∂Wfld1(is,ir,x)/∂x
The positive sign in the formula indicates that force/torque acts in a direction as to tend to increase both field energy and co-energy.
fe = ∂Wfld(is,ir,x)/∂x = ∂Wfld1(is,ir,x)/∂x
The positive sign in the formula indicates that force/torque acts in a direction as to tend to increase both field energy and co-energy.
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In a doubly excited magnetic systems, the magnetic torques and forces ...
Understanding Doubly Excited Magnetic Systems
In doubly excited magnetic systems, such as electric machines, magnetic torques and forces play a crucial role in energy dynamics. Let's explore why the correct answer is option 'C': to increase the field energy at constant currents.
Magnetic Energy Concepts
- Magnetic energy in a system is related to the configuration and interaction of magnetic fields generated by currents.
- In doubly excited systems, both the stator and rotor windings are energized, producing their magnetic fields.
Role of Magnetic Torques and Forces
- When the system is in operation, magnetic torques and forces arise due to the interaction between the magnetic fields.
- These forces tend to align the magnetic fields in a way that optimizes energy transfer.
Effect of Increasing Field Energy
- By aligning the fields, the system reduces reluctance, allowing for efficient magnetic coupling.
- This alignment increases the total magnetic energy stored in the system, which is critical for performance.
Constant Currents Scenario
- Under constant currents, the magnetic fields produced are stable. The system's design ensures that any change to the field configuration will lead to an increase in the overall field energy.
- The objective is to maximize energy efficiency by harnessing the magnetic interactions effectively.
Conclusion
- Therefore, in doubly excited magnetic systems, the torques and forces act to increase the field energy, which is essential for the optimal performance of electric machines and similar systems. This is why option 'C' is the correct answer.
In doubly excited magnetic systems, such as electric machines, magnetic torques and forces play a crucial role in energy dynamics. Let's explore why the correct answer is option 'C': to increase the field energy at constant currents.
Magnetic Energy Concepts
- Magnetic energy in a system is related to the configuration and interaction of magnetic fields generated by currents.
- In doubly excited systems, both the stator and rotor windings are energized, producing their magnetic fields.
Role of Magnetic Torques and Forces
- When the system is in operation, magnetic torques and forces arise due to the interaction between the magnetic fields.
- These forces tend to align the magnetic fields in a way that optimizes energy transfer.
Effect of Increasing Field Energy
- By aligning the fields, the system reduces reluctance, allowing for efficient magnetic coupling.
- This alignment increases the total magnetic energy stored in the system, which is critical for performance.
Constant Currents Scenario
- Under constant currents, the magnetic fields produced are stable. The system's design ensures that any change to the field configuration will lead to an increase in the overall field energy.
- The objective is to maximize energy efficiency by harnessing the magnetic interactions effectively.
Conclusion
- Therefore, in doubly excited magnetic systems, the torques and forces act to increase the field energy, which is essential for the optimal performance of electric machines and similar systems. This is why option 'C' is the correct answer.
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In a doubly excited magnetic systems, the magnetic torques and forces act in such a direction as to tend to ___________a)decrease the field energy at constant currentsb)decrease the field co-energy at constant currentsc)increase the field energy at constant currentsd)none of the mentionedCorrect answer is option 'C'. Can you explain this answer? for Electrical Engineering (EE) 2026 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about In a doubly excited magnetic systems, the magnetic torques and forces act in such a direction as to tend to ___________a)decrease the field energy at constant currentsb)decrease the field co-energy at constant currentsc)increase the field energy at constant currentsd)none of the mentionedCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2026 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In a doubly excited magnetic systems, the magnetic torques and forces act in such a direction as to tend to ___________a)decrease the field energy at constant currentsb)decrease the field co-energy at constant currentsc)increase the field energy at constant currentsd)none of the mentionedCorrect answer is option 'C'. Can you explain this answer?.
In a doubly excited magnetic systems, the magnetic torques and forces act in such a direction as to tend to ___________a)decrease the field energy at constant currentsb)decrease the field co-energy at constant currentsc)increase the field energy at constant currentsd)none of the mentionedCorrect answer is option 'C'. Can you explain this answer? for Electrical Engineering (EE) 2026 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about In a doubly excited magnetic systems, the magnetic torques and forces act in such a direction as to tend to ___________a)decrease the field energy at constant currentsb)decrease the field co-energy at constant currentsc)increase the field energy at constant currentsd)none of the mentionedCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2026 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In a doubly excited magnetic systems, the magnetic torques and forces act in such a direction as to tend to ___________a)decrease the field energy at constant currentsb)decrease the field co-energy at constant currentsc)increase the field energy at constant currentsd)none of the mentionedCorrect answer is option 'C'. Can you explain this answer?.
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