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VARISHA PARVEZ
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Asked: 2023-05-08T06:21:42+00:00 In:

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

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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
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    1. Answer: d

      Explanation: Equation for magnetic torque is Te=1/2is

      2dLs/dθr+1/2ir

      2dLr/dθr+isirdMsr/dθr, if ir=0,

      Te=1/2is

      2dLs/dθr and if is=0, then Te = 1/2ir

      2dLr/dθr, and these equations for torque are called

      reluctance torques.

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