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# An automotive alternator is rated 500 VA and 20 V It delivers its rated voltamperes at a power factor of 085 The resistance per phase is 005 Q and the field takes 2 A at 12 V If the

An automotive alternator is rated 500 VA    and 20 V.  It delivers its rated voltamperes at a  power factor of 0.85. The resistance per phase is 0.05 Q, and the field takes 2 A at 12 V. If the friction and windage loss is 25 W and the core loss is 30 W, calculate the percent efficiency under rated conditions.

14.43      A non–salient pole, Y-connected, three-phase, two-pole synchronous machine has a synchronous reactance of 7 and negligible resistance and rotational losses. One point on the open-circuit characteristic is given by V= 400 V (phase voltage) for a field current of 3.32 A. The machine is to be

operated as a motor, with a terminal voltage of 400 V (phase voltage). The armature current is 50 A, with power factor 0.85, leading. Determine Eb, field current, torque developed, and power angle δ.

Jun 18 2020 View more View Less Subscribe To Get Solution