Q1. (a) Q 1: Write answers of the following questions. A 25 kW, 250 V DC machine whose circuit model is drawn below. The field current is held constant at a speed of 3000 rpm. The open circuit voltage is 250 V. Calculate the terminal power, electromagnetic power, and torque at a terminal voltage of: 255 V;
(a) Q 1: Write answers of the following questions. A 25 kW, 250 V DC machine whose circuit model is drawn below. The field current is held constant at a speed of 3000 rpm. The open circuit voltage is 250 V. Calculate the terminal power, electromagnetic power, and torque at a terminal voltage of: 255 V;
(b) 248 V. The armature resistance is 0.05 Ω. Speed is held constant at 3000 rpm.