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A 4 pole, 60 Hz, 50 hp, 480 V wye connected synchronous motor has RA = 0 Xs = 2.5 ohms per phase and is operated at rated output horsepower with a rotational loss of 1000 watts and a separate 400 watt power source for the field current, which is adjusted to provide a power factor of 0.8 leading.
What is the
A. Developed power of the motor
B. Apparent power of the motor
C. Input current (in polar form) using the input phase voltage as reference
D. The value of Eaf (in polar form)
E. The total power in watts used by the motor
F. The efficiency
Find the steady-state current iR(t) through the resistor and the steady-state current iC(t) through the capacitor. Draw a phasor diagram showing I, IC, and IR.
Sketch the voltage and current along the system for t = 0-.
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What is the steady-state speed? What is the maximum current drawn by the motor? What is the steady-state speed when the applied voltage is 10 V?
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