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A DC shunt generator delivers a load current of 50 A at 300 V with its...
QUESTION 1 A) (10 marks) A 10 kW, 250 V DC self-excited shunt generator, with an...
QUESTION 1 A) (10 marks) A 10 kW, 250 V DC self-excited shunt generator, with an armature resistance of 0.1 ohm, is delivering 80 % of rated power to the mains at rated voltage when being run at 1000 r.p.m. (revolutions per minute). The field circuit resistance is 220 ohms. The brush contact drop is 0.5 V and rotational (mechanical) losses are 750 W Calculate The induced voltage The electromagnetic torque developed The shaft torque The overall efficiency B) (15...
A short shunt compound generator supplies 50kW at 230V. The shunt field, series field and armature...
A short shunt compound generator supplies 50kW at 230V. The shunt field, series field and armature circuit resistances are 46 ohms, 0.02ohms and 0.01ohms respectively. The brush contact drop is 2V. Determine the percent voltage regulation. 3.73% b. 4.55% c. 3.88% d. 3.72% A DC series generator supplies a load of resistance of 1.4 ohms through a pair of feeder conductors of total resistance of 0.1ohms . The voltage at the DC generator terminal is 120 V. What is pd...
A long-shunt, cumulatively compounded dc generator has 1800 shunt-field turns per pole and 12 series-field turns...
A long-shunt, cumulatively compounded dc generator has 1800 shunt-field turns per pole and 12 series-field turns per pole. The armature resistance is 0.12 ohm, the series-field resistance is 0.04 ohm, and the shunt-field resistance is 210 ohms Data for the open-circuit characteristic at 1700 r/min is as follows: Volts 110 200 280 300 Amperes 0.5 1.9 2.35 The generator supplies a load of 15 kW at 200 V when it is driven at 1700 r/min. Determine the speed at which...
3. Each pole of a 100 kW, 250 V short-shunt flat-compound generator has a shunt field...
3. Each pole of a 100 kW, 250 V short-shunt flat-compound generator has a shunt field of 2000 turns and a series field of 7 turns. If the series-field resistance is 0.01 and total shuntfield resistance is 100 2. Calculate the mmf when the machine operates at (a) no-load and (b) full-load Circuit Calculation(s) ha armature is connecte A permanent magnet dc motor tumsa source. Calculate the armature voltage requin (b) 1600 rpm. Neglect armature resistance. Circuit agnet de motor...
The power input to a dc shunt motor during rated-load conditions is 100 W. The rotor...
The power input to a dc shunt motor during rated-load conditions
is 100 W. The rotor speed is 2000 r/min, and the armature voltage
is 100 V. The armature resistance is 2? and Rf = 200 ?. Calculate
the no-load rotor speed.
2. The power input to a dc shunt motor during rated-load conditions is 100W. The rotor speed is 2000r/min, and the armature voltage is 100V. The armature resis- tance is 2 Ω and Rf-200Ω. Calculate the no-load rotor...
A separately excited DC shunt generator produces a no-load voltage of 150 Vdc at 1200 RPM....
A separately excited DC shunt generator produces a no-load voltage of 150 Vdc at 1200 RPM. If the armature resistance is 3 Ohms, calculate the output voltage under the following conditions: (Note all calculations for each problem are to be performed from the base values given above). a) The speed is reduced to 875 RPM. Vout = __________________ b) The field current is increased by 22% (assume a linear field current/flux relationship). Vout = __________________ c) The speed is increased...
A) The input current to a 220 V, short-shunt compound motor at no load is 6 A. The shunt- field c...
a) The input current to a 220 V, short-shunt compound motor at no load is 6 A. The shunt- field circuit resistance is 220 Ω; the armature resistance is 0.112, and the series-field resistance is 0.1 Ω, what is the stray power loss ? (b) Assume the input rating of the motor in Part (a) to be 66 A at 220 V with a no-load speed of 1000 rpm. If the stray power loss varies as the counter-electromotive force and...
A-4 pole, lap-wound, long shunt, dc compound generator has useful flux per pole of 0.07 Wb....
A-4 pole, lap-wound, long shunt, dc compound generator has useful flux per pole of 0.07 Wb. The armature winding consists of 220 turns and the resistance per turns is 0.004 Ω. Calculate the terminal voltage if the resistance of the shunt and series field are 100 Ω and 0.02 Ω respectively; when the generator is running at 900 rpm with armature current 50 A. Also calculate the output power in kW for the generator.
A 8250 w shunt DC motor has a terminal voltage of 300 V. A field resistance...
A 8250 w shunt DC motor has a terminal voltage of 300 V. A field resistance Rf of 40 Ω, and an armature resistance Ra of 250 mm2. The field winding has 1500 turns. An adjustable resistance Rad is connected in series to the field winding. Rad is set at 20 Ω, but it can vary from 0 to 80 Ω. The magnetization curve is shown in Figure.1 and it is taken at a speed of 1200 rpm. (Armature reaction...
part (b) Q5. The magnetization curve for a shunt DC generator is shown in Figure Q5-1.The...
part (b)
Q5. The magnetization curve for a shunt DC generator is shown in Figure Q5-1.The generator is rated at 6 kW, 120 V, 50 A, and 1800 r/min and is shown in Figure Q5-2. Its field circuit is rated at 5A Figure Q5-1 The following data are known about the machine: 11r 0.180 120 V R, 24 Ω R.-0.18Ω -0 to 30 2 NF #1000 turns per pole v, Figure Q5-2 The shunt field resistor Radj is adjusted to...
QUESTION 1 A) (10 marks) A 10 kW, 250 V DC self-excited shunt generator, with an armature resistance of 0.1 ohm, is delivering 80 % of rated power to the mains at rated voltage when being run at 1000 r.p.m. (revolutions per minute). The field circuit resistance is 220 ohms. The brush contact drop is 0.5 V and rotational (mechanical) losses are 750 W Calculate The induced voltage The electromagnetic torque developed The shaft torque The overall efficiency B) (15...
A long-shunt, cumulatively compounded dc generator has 1800 shunt-field turns per pole and 12 series-field turns per pole. The armature resistance is 0.12 ohm, the series-field resistance is 0.04 ohm, and the shunt-field resistance is 210 ohms Data for the open-circuit characteristic at 1700 r/min is as follows: Volts 110 200 280 300 Amperes 0.5 1.9 2.35 The generator supplies a load of 15 kW at 200 V when it is driven at 1700 r/min. Determine the speed at which...
3. Each pole of a 100 kW, 250 V short-shunt flat-compound generator has a shunt field of 2000 turns and a series field of 7 turns. If the series-field resistance is 0.01 and total shuntfield resistance is 100 2. Calculate the mmf when the machine operates at (a) no-load and (b) full-load Circuit Calculation(s) ha armature is connecte A permanent magnet dc motor tumsa source. Calculate the armature voltage requin (b) 1600 rpm. Neglect armature resistance. Circuit agnet de motor...
The power input to a dc shunt motor during rated-load conditions
is 100 W. The rotor speed is 2000 r/min, and the armature voltage
is 100 V. The armature resistance is 2? and Rf = 200 ?. Calculate
the no-load rotor speed.
2. The power input to a dc shunt motor during rated-load conditions is 100W. The rotor speed is 2000r/min, and the armature voltage is 100V. The armature resis- tance is 2 Ω and Rf-200Ω. Calculate the no-load rotor...
a) The input current to a 220 V, short-shunt compound motor at no load is 6 A. The shunt- field circuit resistance is 220 Ω; the armature resistance is 0.112, and the series-field resistance is 0.1 Ω, what is the stray power loss ? (b) Assume the input rating of the motor in Part (a) to be 66 A at 220 V with a no-load speed of 1000 rpm. If the stray power loss varies as the counter-electromotive force and...
A 8250 w shunt DC motor has a terminal voltage of 300 V. A field resistance Rf of 40 Ω, and an armature resistance Ra of 250 mm2. The field winding has 1500 turns. An adjustable resistance Rad is connected in series to the field winding. Rad is set at 20 Ω, but it can vary from 0 to 80 Ω. The magnetization curve is shown in Figure.1 and it is taken at a speed of 1200 rpm. (Armature reaction...
part (b)
Q5. The magnetization curve for a shunt DC generator is shown in Figure Q5-1.The generator is rated at 6 kW, 120 V, 50 A, and 1800 r/min and is shown in Figure Q5-2. Its field circuit is rated at 5A Figure Q5-1 The following data are known about the machine: 11r 0.180 120 V R, 24 Ω R.-0.18Ω -0 to 30 2 NF #1000 turns per pole v, Figure Q5-2 The shunt field resistor Radj is adjusted to...
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