Dear Friend, The induction motor working is similar to transformer working (i.e) it works on induction principle, When you apply the AC signal to the Stator...
1852
Basha
basha_mm
Apr 18, 2009 7:10 pm
Hi All, One of the Fan manufacturer has advised that they require higher size motor to have sufficient torque to run the fan......which i do not...
1853
engr khan
engrgulhayat...
Apr 18, 2009 7:11 pm
dear friend, my question is 1) why a separate transformer is installed for a tube weel (water pump) motor? 2) how to select transformer for 30 hp...
1854
engr khan
engrgulhayat...
Apr 18, 2009 7:11 pm
as the motor function is treated with respect to three facters ,the slip ,reeactance,and the frequency of tge rotar, all these facters vary with the speed of...
1855
Josepth Jose
josepthjose
Apr 18, 2009 7:12 pm
bye the Im Joseph since I was graduated in vocational couse about electric motor repair,I did not fully understand about the winding of sychronous motor,and...
1856
BENNY VAZ
benny06feb
Apr 19, 2009 8:10 pm
Hi! Rotor frequency is the frequency of the emf induced in the rotor due to magnetic induction. Its always a function of slip. ie if slip is high eg during...
1857
Brian Knesal
bknesal
Apr 19, 2009 8:10 pm
Hi The initial high surge is the field being built. [Non-text portions of this message have been removed]...
1858
Ali Rezaei
alirezaei193
Apr 25, 2009 6:35 pm
Hi all: Currently , I am simulating the dc motor 4quadrant control in simulink with an H-bridge. My gate signals is generated with bipolar modulation.when i...
1859
milad_ziai_ziai
Apr 25, 2009 8:46 pm
Dear all Could you please help me with my question about graphs and spanning trees? Let's have an unweighted graph G=<N,b>.(I know its incident list and...
1860
ifeanyi nwaeze
ezenwaeze2003
Apr 25, 2009 8:46 pm
Hi all, I have been having difficulty using simulink in simulating a photovoltaic systems inverter. The idea is to have a buck converter coupled with the...
1861
awoderu2
Apr 25, 2009 8:47 pm
This motor is strange but it works, i learnt that the rotor is fed directly from the source will the stator is fed via induction. isn't that strange?...
1862
engr khan
engrgulhayat...
Apr 25, 2009 8:47 pm
no satisfactory answer is found against my question, which is as under, according to the principal of induction motor that reactance X, frequency Fand...
1863
m.bbalaji
Apr 25, 2009 8:47 pm
in india ,which is the good training center for the plc,,,,,,,,,,,,,, please answer this,,,,,,,,,,,,, or mail me to m.bbalaji@......
1864
Balaji m.b
m.bbalaji
Apr 27, 2009 3:34 am
dear khan, see as u argue, the speed should be low at low frequency (since speed and thefrequency are directly...
1865
awoderu2
Apr 27, 2009 3:35 am
Hi,...
1866
BENNY VAZ
benny06feb
Apr 28, 2009 4:23 pm
The rotor frequency is a function of the slip as you said. But the rotor rotates at a speed which is a function of the supply frequency and not the rotor...
1867
Mark Mcgoveran
tugboatbully
Apr 28, 2009 4:24 pm
shouldn't the rotor frequency be directly proportional to the slip? If you had synchronus speed of 1800 rpm, and the rotor was turning 1800-(.1x1800) the...
1868
ifeanyi nwaeze
ezenwaeze2003
Apr 28, 2009 4:24 pm
Thanks for your response, I am a first time user of the software package. I am trying to model an inverter for photovoltac system in simulink and am stuck. I...
... In a direct current circuit electrons move through metallic conductors are a rate of inches per hour. What really moves in an electric circuit ( and what...
1871
Michael R. Cole
mc5w
May 3, 2009 6:46 pm
... I am not sure of what kind of UPS you have. I have done some service on a line interactive UPS where when on battery power the neutral is still bonded to...
1872
Mark Mcgoveran
tugboatbully
May 3, 2009 6:46 pm
is this .1 one tenth of the synchronous speed? we expect 1750 out of a rotor in these parts!! that is the no load speed, 1800-(.1x1800)=1620 and at 1620 we...
1873
Michael R. Cole
mc5w
May 3, 2009 6:46 pm
... The twisting of the rotor conductors is to smooth out torque pulsations, similar to how larger gearboxes use helical gear teeth to reduce noise and...
1875
Mark Mcgoveran
tugboatbully
May 6, 2009 2:44 pm
... when you say the slip is .1 what do you mean? When I say the slip is .1 I mean the stator field has rotated a complete turn and the rotor has rotated...
1876
engr khan
engrgulhayat...
May 6, 2009 2:47 pm
dear balaji, Xr=sXLr Fr=sFLr Er=sElr now at very low slip let 0.1, the Fr becomes 5hz, hence this frequency of the rotor is very low as compare to the...
1877
izhar khan
izishere
May 6, 2009 2:47 pm
what is the basis of designing ac induction motor stator winding? what decides the winding to be star or delta? Izhar Khan 0925186657...
1878
lingamrama49
May 7, 2009 3:07 pm
dear friends, your numbers are way off. "Based only on an energy charge of $0.10101/kwh plus a 3% non taxable customer charge calculate the cost of operating a...
1879
fernandoazevedo.rm
fernandoazev...
May 14, 2009 3:47 pm
what is the best and simple way to control the speed of electric motor of a crane (machine used to lift objects)?? tks fernando...
1880
kayaker7700@...
kayaker7700...
May 14, 2009 3:47 pm
Hello To All, I'm Doug Allen. I live in the central coastal region of California. My experience is mechanics(automotive and aircraft), electronics in the...
1881
james
jdelectrician
May 14, 2009 4:14 pm
... SOME OF IT DEPENDS UPON THE MOTOR INFO, BUT GENERALLY A STANDARD SPEED CONTROL IF IT IS A 120VOLT AC MOTOR. THIS CAN BE A STANDARD FAN SPEED CONTROL IF THE...
