Electrical Machines Unbalance 3 - Φ stator currents cause All of these double frequency currents in the rotor. heating of rotor. vibrations. All of these double frequency currents in the rotor. heating of rotor. vibrations. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 200 V DC machine supplies 20 A at 200 V as a generator. The armature resistance is 0.2 Ω. If the machine is now operated as a motor at same terminal voltage and current but with the flux increased by 10%, the ratio of motor speed to generator speed is 0.87 0.95 1.06 0.96 0.87 0.95 1.06 0.96 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When a DC cummulative compound wound motor is loaded Both torque and speed decrease. Torque decrease and speed increases. Torque and speed both increase. Torque increase and speed decrease. Both torque and speed decrease. Torque decrease and speed increases. Torque and speed both increase. Torque increase and speed decrease. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC machine shape of main field flux distribution is? saddle shape peaky in nature triangular flat tapped or trapezoidal saddle shape peaky in nature triangular flat tapped or trapezoidal ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 8-pole, DC generator has a simplex wave-wound armature containing 32 coils of 6 turns each. Its flux per pole is 0.06 Wb. The machine is running at 250 rpm. The induced armature voltage is 192 V 384 V 768 V 96 V 192 V 384 V 768 V 96 V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For power factor improvement the synchronous motor is to be lightly loaded and over excited heavily loaded and over excited heavily loaded and underexcited lightly loaded and underecited lightly loaded and over excited heavily loaded and over excited heavily loaded and underexcited lightly loaded and underecited ANSWER DOWNLOAD EXAMIANS APP
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