Which of the following are examples of doubly-excited magnetic systems?
In a doubly excited magnetic system with salient pole type stator and rotor, if the rotor is not allowed to move, then the equation for magnetic field stored energy in establishing the currents from zero to is and ir is __________
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In a doubly excited magnetic systems, the magnetic torques and forces act in such a direction as to tend to ___________
Which component of torque in the following equation is called the electromagnetic torque of electromagnetic energy conversion device?
Te = 1/2is2dLs/dθr + 1/2ir2dLr/dθr+isirdMsr/dθr
Which of the following statements are true about electromagnetic torques and reluctance torques?
(i) electromagnetic torque can exist only if both windings carry current
(ii) reluctance torque depend on the direction of current in stator or rotor windings
(iii) reluctance torque doesn't depend on the direction of current in stator or rotor windings
(iv) electromagnetic torque depend on the direction of currents is and ir
(v) electromagnetic torque doesn't depend on the direction of currents is and ir
Most of the electromagnetic energy conversion devices belong to __________
In a doubly excited magnetic system of salient pole stator and rotor, the magnetic torque (Te) depends on which of the following statements?
(i) the instantaneous values of currents is and ir
(ii) the angular rate of change of inductances
(iii) the differential changes of current dis and dir
(iv) only the instantaneous values of self inductance
In a doubly excited magnetic system of salient pole type stator and rotor, the reluctance torque is present only when _________
Which components of torque in the following equation are called the reluctance torque terms?
Te = 1/2is2dLs/dθr + 1/2ir2dLr/dθr+isirdMsr/dθr
Singly and doubly excited magnetic systems applications are respectively ________
19 videos|90 docs|25 tests
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19 videos|90 docs|25 tests
|