Q: A 8 pole long shunt DC compound generator ruining at 1200 r.pm , supplies a load of 0,255 KA at 230 V , the total flux is 0.288 Wb .What will be the new rotor speed if the flux decreased to (50%) ?, and the e.mf generated decreased to (50%) armature resistance 0.037, series field resistance 0.43 and shunt field resistance 220 all resistances in ohm
Q: Q: A 8-pole lap-wound dc generator is designed to have an average air gap flux density of 0.8 T. The…
A:
Q: A separately excited D.C motor is rated for a full load torque of 100Nm. For an applied voltage of…
A: In the question, A separately excited D.C motor full load torque =100Nm. For an applied voltage…
Q: Of a shunt excited DA generator; Excitation winding internal resistance R = 2.5 e Armature winding…
A:
Q: A 500 V, 200 kW, long shunt compound generator induces an e.m.f. of 480 V when running at 1000…
A: Given Data: Induced emf Eg0 = 480 V Speed N0 = 1000 rpm
Q: Q: A8 pole short shunt DC compound generator ruining at 800 r.pm , supplies a load of 0,255 KA at…
A:
Q: Q:A 8 pole long shunt DC compound generator ruining at 1200 r.pm , supplies a load of 0,255 KA at…
A:
Q: Q2/ A six pole DC series generator ruining at 104,66 rad/s, supplies resistive load 26 Kw 0.97 Q…
A: Given data, Speed is ω=104,66 rad/sec., Resistive load is RL=0.97 Ω, Flux per pole is ψ=0.02…
Q: A 1500 kW, 550-V, 16 pole generator runs at 150 rev. per min. What must be the useful flux if there…
A:
Q: Q A four pole self excited DC shunt generator ruining at 104,66 rad's, supplies resistive load 18 Kw…
A:
Q: A 4-pole shunt motor develops 20 lb-ft of torque when the flux per pole is 700,000 maxwells. If the…
A: Given DC shunt motor Torque T=20 lb-ft=27.116 NmFlux per pole ϕ=700000 maxwells=700000×1×10-8…
Q: Q1)A short- shunt( d.c) compound generator supplies (200A) at (100V) the resistances of armature…
A: 1) The short shunt dc compound generator and the equivalent circuit of the question is as follows:…
Q: With the aid of mathematical expressions where necessary, explain the following terms with respect…
A: As per the deadline we need to show only first three some part of a given question. we need to…
Q: Q: A four pole self excited DC shunt generator ruining at 104,66 rad/s, supplies resistive load 18…
A:
Q: A 220 V, 60 Hz, supply is connected to 200-turn armature winding of reluctance 1.7×10 At/Wb. Find…
A: Given No of turns ,reluctance of an armature winding connected to a AC supply. We need to…
Q: Can we close the slots of the armature core of dc generator to a) make an improvement on it, for…
A: for a dc generator in the armature core The slots are of the open, closed and semi-closed type. the…
Q: A 25kW, 250V DC shunt generator has armature and field resistances of 0.06 ohm and 100 ohm…
A: A d.c. generator is an electrical machine in which mechanical energy gets converted into electrical…
Q: A four-pole motor has an armature having 276 conduction. Each pole face is designed and constructed…
A: Given data is as follows; Pole (p)=4 Conductor(z)=276 Flux density=47500 linesq.inch…
Q: A long-shunt, four pole, 1500-W, 250-V, duplex wave-wound DC compound generator with the rated speed…
A: we need to find out (a) the generated voltage, (b) the field currents, (c) the power generated in…
Q: Q2/ A six pole DC series generator ruining at 104,66 rad/s, supplies resistive load 26 Kw 0.97 2…
A:
Q: A 250V shunt generator has a rated armature current of 40A and the following losses at full load:…
A: Given 250 V shunt generator rated armature current of 40A friction and windage = 200 watts core…
Q: Q: A four pole self excited DC shunt generator ruining at 104,66 rad's, supplies resistive load 18…
A: DC shunt circuit diagram with load can be drawn as shown below
Q: A long shunt de generator supplies 8 kW at voltage of 250 V. The armature resistance, shunt field…
A:
Q: 16. A) In DC motor, the force on the current-carrying conductor in a magnetic field depends upon…
A: In this question we will find force on current carrying conductor in magnetic field and speed of DC…
Q: Q: A four pole self excited DC shunt generator ruining at 104,66 rad's, supplies resistive load 18…
A: Gievn : P = 4 N = 104.66 rad/sec R - 1.1 ohm P = 18 kw Ish = V / Rsh = 0.6395 ∴ IL = 18…
Q: Q2/ A six pole DC series generator ruining at 104,66 rad/s , supplies resistive load 26 Kw 0.97 Q…
A:
Q: Q: A four pole sclf excited DC shunt generator ruining at 104,66 rad's, supplics resistive load 18…
A:
Q: A short shunt compound DC generator supplies a load current of 10A at a voltage of 10 volts. If the…
A: Given: A short shunt compound DC generator in which IL=10AV=10VRa=0.001ΩRsh=1ΩRse=0.00Ω According to…
Q: 3. In shunt DC generator, the rated load power and speed are 6kW and 1500rpm. The rated load voltage…
A:
Q: Q:A 8 pole long shunt DC compound generator ruining at 1200 r.pm , supplies a load of 0,255 KA at…
A: According to guidelines we need to solve only the first question. Given, 8 poles long shunt DC…
Q: . The armature of a 6-pole separately excited dc generator is triplex wave wound with 534…
A:
Q: Q: A four pole self excited DC shunt generator ruining at 104,66 rad/s , supplies resistive load 18…
A: Given machine is self excited DC shunt generator. Number of poles, P=4. Speed of generator, w=10466…
Q: A 20 kW, 440 V, long shunt, compound dc generator has a full load efficiency of 87 %. If the…
A:
Q: is given by... by the motor is . by the torque required from the load. 7. The Speed of DC motors can…
A:
Q: Example 5: A short-shunt compound generator delivers a load current of 30 A at 220 V, and has…
A: The solution can be achieved as follows.
Q: A 4-pole, 440 V, 900 rpm, simplex wave wound dc motor has a full load armature current of 25 A. The…
A: given simplex wave wound dc motor
Q: A separately excited D.C. generator has armature circuit resistance of 0.1 ohm and the total…
A:
Q: A long-shunt compound d.c. generator with armature, series field and shunt field resistance of 0.5,…
A: Given data: Ra=0.5ΩRse=0.4ΩRsh=250Ω
Q: Q2/ A six pole DC series generator ruining at 104,66 rad/s , supplies resistive load 26 Kw 0.97 0…
A: Given data : Flux per pile- 0.2 Wb Armature resistance- 0.037ohm Series field resistance-0.047ohm
Q: A series DC generator runs at 1000 rpm to supplies a current of 200A to the load at a voltage of…
A:
Q: 3. In shunt DC generator, the rated load power and speed are 6kW and 1500rpm. The rated load voltage…
A:
Q: A 6 pole, wave wound DC shunt generator has a useful total flux of 420 mWb. The armature winding…
A: There are two kinds of DC machine DC motor and DC generator DC motor: DC motor takes DC current as a…
Q: Q: A six pole DC series generator ruining at 104,66 rad/s, supplies resistive load 26 Kw 0.97 N…
A:
Q: Q: A 8-pole lap-wound dc generator is designed to have an average air gap flux density of 0.8 T. The…
A: Given: An 8-pole lap wound DC generator is designed to, Ra=0.3ΩVbd=2VB=0.8T There is a slight…
Q: Q:A8 pole long shunt DC compound generator ruining at 1200 r.pm , supplies a load of 0,255 KA at 230…
A: The new speed is same as initial speed since the percentage change in flux and genrator emf is same…
Q: hunt generator delivers 195 A at a terminal voltage of 250V. The armature resistance and the shunt…
A: Efficiency is output to input ratio Here we have mechanical input= electrical induced power + mech…
Q: Q: A four pole self excited DC shunt generator ruining at 104,66 rad/s, supplies resistive load 18…
A:
Q: Q2/ A six pole DC series generator ruining at 104,66 rad/s, supplies resistive load 26 Kw 0.97 Q…
A:
Q: Q: A 8-pole lap-wound dc generator is designed to have an average air gap flux density of 0.8 T. The…
A: Given: An 8-pole lap-wound dc generator is designed to have An average air gap flux density: B=0.8 T…
Q: Q:A8 pole long shunt DC compound generator ruining at 1200 r.pm. supplies a load of 0.255 KA at 230…
A: Shunt DC generator , Pole p=8 Speed N=1200 r.p.m Load 0.255 KA at 230V total flux φ=0.288 Wb
Q: The field and armature resistance of a four-pole shunt generator with lap- connected armature is 50…
A:
Step by step
Solved in 2 steps with 2 images
- A 4-pole lap -wound dc generator is designed to have an average airgap flux density of 0 .8 T. The armature winding resistance is 0 .3 Ω, and the brush contact drop is 1 V. There is a slight fault in the magnetic circuit which causes the emfs in two of the paths to be 5 %more than the nominal value, and the emfs in the other two paths 5 %less . a) If the generator supplies a full load of 4 .5 kw at 150 V, find the nominaland actual values of path emfs, coil currents, and armature copper loss. b) Find the nominal and actual values of coil currents and armature copperloss when the generator has no external load.A long-shunt, four pole, 1500-W, 250-V, duplex wave-wound DC compound generator with the rated speed of 500 r.p.m., has a shunt field resistance of 100 Ω, a series field resistance of 0.05 Ω and an armature resistance of 0.2 Ω. If the flux per pole is 48.798 mWb and a total of 620 conductors, calculate the following: (a) the generated voltage, (b) the field currents, (c) the power generated in the armature.A 500 V, 250 kW, long shunt compound generator induces an e.m.f. of 480 V whenrunning at 1000 r.p.m. no load. On full load the spped of the machine drops to 975r.p.m. the flux increases by 15% and the terminal voltage rises to 500 V. If theseries and shunt field resistances are 0.02 ohm and 100 ohms respectively,calculate the armature resistance. Assume a voltage drop of 1V per brush.[Ans.
- A long shunt compound generator delivers 100 A at 250 V. The armature, shunt field and series field resistances are 0.02 Ohms, 50 Ohms and 0.05 Ohms respectively. If the Break Horse Power (BHP) or the power developed by the shaft torque of the driving engine is 40, determine the stray loss.Dc machines A separately excited D.C. generator has an armature circuit resistance of 0.1 ohms. And the total brush-drop is 2 V. When running at 1000 r.p.m., it delivers a current of 100 A at 250 V to a load of constant resistance. If the generator speed drop to 700 r.p.m., with field-current unaltered, find the current delivered to load.. When a self-excited compound DC generator supplies load, the terminal voltage is not the same as the generated emE Why? a) voltage drop across the armature resistance will reduce the voltage available at the load terminals b) where there is a series field, voltage drop across the series field resistance will reduce the voltage available at the load terminals c) both "a" and "b" d) neither "a" nor "b"
- The armature winding resistance of a long shunt connected DC generator is 0.4ohm, the resistances of the shunt and serial field windings are 125 ohms and 0.1 ohms, respectively. While the generator supplies 8KW of power to the load it feeds, which is the voltage it produces since the output voltage is 250V?A series generator having a combined armature and field resistance of 0.4 ohm usrunning at 1000 rpm and delivering 5.5 kW at a terminal voltage of 110 V. If thespeed is raised to 1500 rpm and load adjusted to 10 kW, find the new terminalvoltage. Assume the machine is working on straight line portion of magnetizationcharacteristics.The armature of a 6-pole separately excited dc generator is triplex wave wound with 534 conductors. This machine delivers power to the load at 200V while being driven at 900rpm. At this load, the armature circuit dissipates 640W. If the flux of this generator is 180-mWb, determine the kW rating of the load served. Assume a total brush drop of 2V.
- A 35 kW, 400 V, short shunt, compound dc generator has a full load efficiency of 85 %. If the resistance of the armature and interpole is 0.35 ohm and that of the series and shunt fields are 0.15 ohm and 220 ohms respectively. Calculate the following: Output of the prime mover = kW Power developed in the armature = kw Total Copper Losses = kw Combined bearing friction, windage and core loss = kwA short shunt compound DC generator delivers a load current of 30 A at 220 V and has armature, series field and shunt field resistances of 0.05, 0.3 and 200Ω respectively. Calculate the induced emf, the armature current and the voltage regulation. Allow 1 V per brush for contact droA separately excited D.C. generator has an armature circuit resistance of 0.1 ohms. And the total brush-drop is 2 V. When running at 1000 r.p.m., it delivers a current of 100 A at 250 V to a load of constant resistance. If the generator speed drop to 700 r.p.m., with field-current unaltered, find the current delivered to load.