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considering only the rotor equivalent circuit shown in figure 1322 or 1323 finda the r2 for which the developed torque
a three-phase 220-v 60-hz four-pole wye connected induction motor has a per-phase stator resistance of 05 omega the
a three-phase 50-hp 440-v 60-hz four-pole wound-rotor induction motor operates at a slip of 003 at full load with its
the per-phase equivalent circuit shown in figure 1326 of a three-phase 600-v 60-hz four pole wye-connected wound-rotor
a three-phase wye-connected 400-v four-pole 60-hz induction motor has primary leakage impedance of 1 j2 omega and
a three-phase induction motor operating at its rated voltage and frequency develops a starting torque of 16 times the
the synchronous speed of a wound-rotor induction motor is 900 rmin under a blocked-rotor condition the input power to
a large induction motor is usually started by applying a reduced voltage across the motor such a voltage may be
a three-phase 400-v wye-connected induction motor takes the full-load current at 45 v with the rotor blocked the
a three-phase 2200-v 60-hz delta-connected squirrel-cage induction motor when started at full rated voltage takes a
a three-phase four-pole 220-v 60-hz induction machine with a per-phase resistance of 05 omega is operating at rated
a dc machine operating as a generator develops 400 v at its armature terminals corresponding to a field current of 4 a
repeat problem 1318 if the generator operates at 50 hzproblem 1318a synchronous generator has a rotor with six poles
a four-pole three-phase induction motor is energized from a 60-hz supply it is running at a load condition for which
a three-phase 60-hz induction motor runs at almost 1800 rmin at no load and at 1710 rmin at full loada how many poles
a three-phase 50-hz induction motor has a full load speed of 700 r min and a no-load speed of 740 rmina how many poles
in the storage of flammable liquids if the composition of the vapor-air mixture above the liquid surface falls within
a synchronous generator has a rotor with six poles and operates at 60 hza determine the speed of prime mover of the
a three-phase wound-rotor induction machine with its shaft rigidly coupled to the shaft of a three-phase synchronous
a four-pole three-phase wound-rotor induction machine is to be used as a variable-frequency supply the frequency of the
induction motors are often braked rapidly by a technique known as plugging which is the reversal of the phase sequence
consider a three-phase induction motor with a normal torque-speed characteristic neglecting the effects of stator
a dc shunt motor runs off a constant 200-v supply the armature winding resistance is 04 omega and the field winding
a 100-kw dc shunt generator connected to a 220-v main is belt-driven at 300 rmin when the belt suddenly breaks and the