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LAB MANUAL LAB EXPERIMENT - 04: LOAD CHARACTERISTICS OF SEPARATELY EXCITED DC GE ATELY EXCITED DC...
A second separately excited DC generator has the same electrical parameters as the generator in part...
A second separately excited DC generator has the same electrical
parameters as the generator in part (a) first but does not have
compensating windings. The full-load demagnetising armature
reaction is equivalent to 500 Ampere-turns. (i) With Radj = 63Ω and
the generator is driven at 1600rpm, what is the no-load terminal
voltage? (ii) What would be the output terminal voltage if 364A
were drawn from the armature at 1600rpm?
Q2. (a) Fig. Q20) shows a separately excited DC generator with...
true or false with explanation a- A separately excited DC generator terminal current increases as a...
true or false with explanation a- A separately excited DC generator terminal current increases as a resistive load is applied b- In a separately excited DC generator, a voltage will exist at the terminals for a zero speed c- Doubling the load on the generator will increase the generator voltage by a factor of two. d- The commutator is used for adding a resistor to the rotor. e- A rotating magnetic field is produced around the air gap.
Please explain the no-load characteristics for shunt and separately excited DC motors. How will rotor speed,...
Please explain the no-load characteristics for shunt and separately excited DC motors. How will rotor speed, armature current and field current be effected for both at no load?
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...
A4-pole, 500V DC separately excited generator is running at a speed of 450 rpm. Its field...
A4-pole, 500V DC separately excited generator is running at a speed of 450 rpm. Its field and armature resistances are 35 and 0.007 ohms respectively. If the generator is supplying a 750 kW load and the rotational power loss is 12180 W, find: a) The armature induced voltage, b) The input power
Q1. Draw the equivalent circuits of a separately excited and a shunt DC motor. [20] Q2....
Q1. Draw the equivalent circuits of a separately excited and a shunt DC motor. [20] Q2. Derive the speed-torque relation for a DC motor: [40] 0 = VR, Kø (KØ)??ind Q3. A DC motor's speed can be controlled by either changing the field resistance, changing the armature voltage or changing the armature resistance. Of these three, which one is the best method for DC motor speed control and which is the worst? Give reasons. [40]
PLEASE DON'T COPY FROM OTHER ANSWERS. IF I WOULD LIKE I WOULD TAKE IT FROM THERE! IF YOU DON'T KN...
PLEASE DON'T COPY FROM OTHER ANSWERS. IF I WOULD LIKE I WOULD
TAKE IT FROM THERE! IF YOU DON'T KNOW HOW TO SOLVE, JUST LEAVE IT
PLEASE.
Q2. (a) Fig Q2) shows a separately excited DC generator with compensating windings, and rated at 430V, 400A and 1800rpm. The field winding has NF1000 turns and resistance R-200. Adjustable resistance Rad 0-300 is included in the field circuit to enable the field current to be controlled. The generator magnetising characteristic at 1800rpm...
Q2. (10 points) A 10 kW, 100 V, 1000 rpm dc shunt generator has armature resistance...
Q2. (10 points) A 10 kW, 100 V, 1000 rpm dc shunt generator has armature resistance Ra = 0.1.2. The field current generating 100 V at no-load is 1.0 A. The magnetization characteristic at 1000 rpm is shown in figure below. The machine is operated as a separately excited dc generator at 1000 rpm with rated field current. Neglecting the armature reaction effect; (a) Determine full load armature current, la (b) Determine the terminal voltage at full load, with ly...
separately excited series, shunt, compound DC motor: *Describe how does decreasing the field current IF affect...
separately excited series, shunt, compound DC motor: *Describe how does decreasing the field current IF affect the speed versus voltage characteristic and constant K1 of a separately-excited dc motor. K1=(n2-n1)/(E2-E1) *Describe how does decreasing the field current IF affect the torque versus current characteristic and constant K2 of a separately-excited dc motor? k2=(T2-T1)/(I1-I2) *Briefly describe how the speed varies as the mechanical load applied to the series motor increases, i.e. as the motor torque increases.
4. A separately excited de generator is rated at 172 kW, 430 V, 400 A, and...
4. A separately excited de generator is rated at 172 kW, 430 V, 400 A, and 1800 rpm. Its field circuit has a total resistance Radi +Rp. Its magnetizing curve is shown in Fig. P4.1. The machine has the following characteristics: RA = 0.05 2; Rr = 20 2; Radi (a) Draw the schematic diagram of the generator. (b) If the variable resistor Radi in this generator's field circuit is adjusted to 63 2 and the generator's =0 to 300...
A second separately excited DC generator has the same electrical
parameters as the generator in part (a) first but does not have
compensating windings. The full-load demagnetising armature
reaction is equivalent to 500 Ampere-turns. (i) With Radj = 63Ω and
the generator is driven at 1600rpm, what is the no-load terminal
voltage? (ii) What would be the output terminal voltage if 364A
were drawn from the armature at 1600rpm?
Q2. (a) Fig. Q20) shows a separately excited DC generator with...
Q1. Draw the equivalent circuits of a separately excited and a shunt DC motor. [20] Q2. Derive the speed-torque relation for a DC motor: [40] 0 = VR, Kø (KØ)??ind Q3. A DC motor's speed can be controlled by either changing the field resistance, changing the armature voltage or changing the armature resistance. Of these three, which one is the best method for DC motor speed control and which is the worst? Give reasons. [40]
PLEASE DON'T COPY FROM OTHER ANSWERS. IF I WOULD LIKE I WOULD
TAKE IT FROM THERE! IF YOU DON'T KNOW HOW TO SOLVE, JUST LEAVE IT
PLEASE.
Q2. (a) Fig Q2) shows a separately excited DC generator with compensating windings, and rated at 430V, 400A and 1800rpm. The field winding has NF1000 turns and resistance R-200. Adjustable resistance Rad 0-300 is included in the field circuit to enable the field current to be controlled. The generator magnetising characteristic at 1800rpm...
Q2. (10 points) A 10 kW, 100 V, 1000 rpm dc shunt generator has armature resistance Ra = 0.1.2. The field current generating 100 V at no-load is 1.0 A. The magnetization characteristic at 1000 rpm is shown in figure below. The machine is operated as a separately excited dc generator at 1000 rpm with rated field current. Neglecting the armature reaction effect; (a) Determine full load armature current, la (b) Determine the terminal voltage at full load, with ly...
4. A separately excited de generator is rated at 172 kW, 430 V, 400 A, and 1800 rpm. Its field circuit has a total resistance Radi +Rp. Its magnetizing curve is shown in Fig. P4.1. The machine has the following characteristics: RA = 0.05 2; Rr = 20 2; Radi (a) Draw the schematic diagram of the generator. (b) If the variable resistor Radi in this generator's field circuit is adjusted to 63 2 and the generator's =0 to 300...
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