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In a doubly excited magnetic system of salient pole type stator and rotor, the reluctance torque is present only when _________
- a)both stator and rotor currents are acting
- b)stator current is acting alone
- c)rotor current is acting alone
- d)any of the stator or rotor currents acting alone
Correct answer is option 'D'. Can you explain this answer?
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In a doubly excited magnetic system of salient pole type stator and ro...
Reluctance Torque in Doubly Excited Magnetic System
The reluctance torque is a type of torque that is generated in doubly excited magnetic systems, such as salient pole type stators and rotors. In order to understand when the reluctance torque is present, it is important to understand the concept of reluctance.
Reluctance
Reluctance is a property of a magnetic circuit that is analogous to resistance in an electrical circuit. It is a measure of how difficult it is for magnetic flux to flow through a material. The higher the reluctance, the lower the magnetic flux.
Reluctance Torque
Reluctance torque is a torque that is generated due to the variable reluctance of the magnetic circuit. It is present when there is a difference in the reluctance between the stator and rotor of a doubly excited magnetic system.
Stator and Rotor Currents
In a doubly excited magnetic system, both the stator and rotor have currents flowing through them. These currents create magnetic fields that interact with each other, resulting in the generation of torque. However, the reluctance torque is present only when either the stator current or the rotor current is acting alone.
Explanation
When both the stator and rotor currents are acting, the magnetic fields they create interact with each other in a way that cancels out the reluctance torque. This is because the magnetic fields produced by the stator and rotor currents are in opposite directions, and their torque contributions tend to cancel each other out.
On the other hand, when either the stator current or the rotor current is acting alone, the cancellation effect is not present. This means that there is a difference in the reluctance between the stator and rotor, resulting in the generation of reluctance torque.
In summary, the reluctance torque is present in a doubly excited magnetic system of salient pole type stator and rotor when either the stator current or the rotor current is acting alone. This is because the cancellation effect of the magnetic fields produced by the stator and rotor currents is not present in these cases.
The reluctance torque is a type of torque that is generated in doubly excited magnetic systems, such as salient pole type stators and rotors. In order to understand when the reluctance torque is present, it is important to understand the concept of reluctance.
Reluctance
Reluctance is a property of a magnetic circuit that is analogous to resistance in an electrical circuit. It is a measure of how difficult it is for magnetic flux to flow through a material. The higher the reluctance, the lower the magnetic flux.
Reluctance Torque
Reluctance torque is a torque that is generated due to the variable reluctance of the magnetic circuit. It is present when there is a difference in the reluctance between the stator and rotor of a doubly excited magnetic system.
Stator and Rotor Currents
In a doubly excited magnetic system, both the stator and rotor have currents flowing through them. These currents create magnetic fields that interact with each other, resulting in the generation of torque. However, the reluctance torque is present only when either the stator current or the rotor current is acting alone.
Explanation
When both the stator and rotor currents are acting, the magnetic fields they create interact with each other in a way that cancels out the reluctance torque. This is because the magnetic fields produced by the stator and rotor currents are in opposite directions, and their torque contributions tend to cancel each other out.
On the other hand, when either the stator current or the rotor current is acting alone, the cancellation effect is not present. This means that there is a difference in the reluctance between the stator and rotor, resulting in the generation of reluctance torque.
In summary, the reluctance torque is present in a doubly excited magnetic system of salient pole type stator and rotor when either the stator current or the rotor current is acting alone. This is because the cancellation effect of the magnetic fields produced by the stator and rotor currents is not present in these cases.
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In a doubly excited magnetic system of salient pole type stator and ro...
Equation for magnetic torque is Te = 1/2is2dLs/dθr+1/2ir2dLr/dθr+isirdMsr/dθr, if ir = 0, Te = 1/2is2dLs/dθr and if is = 0, then Te = 1/2ir2dLr/dθr, and these equations for torque are called reluctance torques.
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In a doubly excited magnetic system of salient pole type stator and rotor, the reluctance torque is present only when _________a)both stator and rotor currents are actingb)stator current is acting alonec)rotor current is acting aloned)any of the stator or rotor currents acting aloneCorrect answer is option 'D'. Can you explain this answer?
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In a doubly excited magnetic system of salient pole type stator and rotor, the reluctance torque is present only when _________a)both stator and rotor currents are actingb)stator current is acting alonec)rotor current is acting aloned)any of the stator or rotor currents acting aloneCorrect answer is option 'D'. Can you explain this answer? for Electrical Engineering (EE) 2024 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 system of salient pole type stator and rotor, the reluctance torque is present only when _________a)both stator and rotor currents are actingb)stator current is acting alonec)rotor current is acting aloned)any of the stator or rotor currents acting aloneCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In a doubly excited magnetic system of salient pole type stator and rotor, the reluctance torque is present only when _________a)both stator and rotor currents are actingb)stator current is acting alonec)rotor current is acting aloned)any of the stator or rotor currents acting aloneCorrect answer is option 'D'. Can you explain this answer?.
In a doubly excited magnetic system of salient pole type stator and rotor, the reluctance torque is present only when _________a)both stator and rotor currents are actingb)stator current is acting alonec)rotor current is acting aloned)any of the stator or rotor currents acting aloneCorrect answer is option 'D'. Can you explain this answer? for Electrical Engineering (EE) 2024 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 system of salient pole type stator and rotor, the reluctance torque is present only when _________a)both stator and rotor currents are actingb)stator current is acting alonec)rotor current is acting aloned)any of the stator or rotor currents acting aloneCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In a doubly excited magnetic system of salient pole type stator and rotor, the reluctance torque is present only when _________a)both stator and rotor currents are actingb)stator current is acting alonec)rotor current is acting aloned)any of the stator or rotor currents acting aloneCorrect answer is option 'D'. Can you explain this answer?.
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In a doubly excited magnetic system of salient pole type stator and rotor, the reluctance torque is present only when _________a)both stator and rotor currents are actingb)stator current is acting alonec)rotor current is acting aloned)any of the stator or rotor currents acting aloneCorrect answer is option 'D'. Can you explain this answer?, a detailed solution for In a doubly excited magnetic system of salient pole type stator and rotor, the reluctance torque is present only when _________a)both stator and rotor currents are actingb)stator current is acting alonec)rotor current is acting aloned)any of the stator or rotor currents acting aloneCorrect answer is option 'D'. Can you explain this answer? has been provided alongside types of In a doubly excited magnetic system of salient pole type stator and rotor, the reluctance torque is present only when _________a)both stator and rotor currents are actingb)stator current is acting alonec)rotor current is acting aloned)any of the stator or rotor currents acting aloneCorrect answer is option 'D'. Can you explain this answer? theory, EduRev gives you an
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