Field current (A) O.C. e.m.f. (V) If the field resistance is 502 and armature resistance is 0.20, find graphically: 1- the voltage to which the machine will excite when running at 1100r.p.m. 2- The additional resistance in the field circuit when the e.m.f. is 120V and the speed is 1100 f.p.m. 3- The speed of the machine when the e.m.f is 130V with 502 field circuit resistance. (4 The terminal voltage at maximum load current. 0.5 1 1.5 2.5 3 3.5 70 104 119 130 138 145 150

Q: 1.2 The armature of an 8-pole dc machine has 72 slots, and its diameter is48 cm .Find the pole pitch…

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Q: 7- An 8-pole d.c. machine of 1200kW, 600V, 500 rpm and the average value of the reactance voltage…

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Q: Nhich of the following parameter is responsible for the degree of armature reaction, affecting the…

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Q: PID LOOP SIMULATOR M 00 3.4 Kp + + Kps 10r +1 Reference RPMI Controller DC Motor Controller Kp KI KD

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Q: By using MMF method find the approximate voltage regulation of the machine provided that the rated…

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Q: A dc motor operates with a load that demands constant developed torque. With VT=200 V, the motor…

A: Given: To determine the speed of VT which is increased to 250 V. Vt= 200Ia= 10Ra= 5

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Q: The armature of an 8 -pole dc machine has 72 slots, and its diameter is48 cm. Find the pole pitch in…

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Q: A 220 V shunt motor has an armature resistance of 0.2 2 and a field resistance of 110 N. The motor…

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Coulomb’s Law

Coulomb's law states that the attraction or repulsion force between two charged things is proportional to the product of their charges and inversely proportional to the square of their distance. It has an effect along the line that connects the two-point charges.