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A 4000-V, 5000-hp, 60-Hz, 12-pole synchronous motor, with a synchronous reactance of 4 per phase (based on cylindrical-rotor theory), is excited to produce unity power factor at rated load.
Neglect all losses.
(a) Find the rated and maximum torques.
(b) What is the armature current corresponding to the maximum torque?
Insulators have (A) A full valence band. (B) An empty conduction band. (C) A large energy gap. (D)All the above. Ans: Insulators have a large energy gap.
An audio amplifier with feedback needs gain of approximately 500 in a 3-dB bandwidth extending from 60 Hz to 25 kHz. Assume this is accomplished using a feedback network with ß=0.0
Q. A solenoid of cylindrical geometry is shown in Figure. (a) If the exciting coil carries a steady direct current I, derive an expression for the force on the plunger. (b) F
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#full discuss on compensating windingsquestion..
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Now you have to digitally implement this circuit. Compute a difference equation which if you implement will behave exactly like this circuit.
Q. A 6 - pole, DC armature with 36 slots and 2 coil - slides/slot is to be wave wound (double layer). Calculate the back pitch, front - pitch and commentator pitch. How many dumm
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