i am trying to convert an induction motor to a generator but still its not working.details given below?
470053
An induction motor will not work as a generator because there is no way you can create the magnetic field. You need some sort of magnetic field to make a generator work.\n\nIn order to induce a voltage you need three things:\n1. A conductor capable of carrying current\n2. A magnetic field\n3. Relative motion between the two.\n\nA generator either 3 phase or single phase, will have a rotating field. Power to this field is supplied via brushes and slip rings. See if you can find an old alternator from a car to take apart. Alternators are really 3 phase AC generators. The DC for the car is created using a set of diodes that you will find inside of the alternator. The diodes are often encased in plastic.\n\nA drill motor or other motor that has a commutator (a group of coppers bars that run parallel to the shaft) can be modified to be a generator, however it will produce a DC output.\n\n(Added 5/3)\nYou are correct that a voltage will be induced, however it is being induced in a place where you can't get it. An induction motor uses a squirrel cage rotor. When connected properly, the rotating magnetic field of the stator induces a voltage in the rotor. This voltage creates a magnetic field that causes the motor to rotate. However, since there are no slip rings or other connection to the rotor, there is no way for you to draw off the power generated. \n\nTo make a long story short, an induction motor can not be used as a generator. It simply does not have what you need to work.
786312
Since you're dealing with a variable energy source (wind), you're best bet is to build a DC generator...\n\nIs this a science progect?\n\nA DC Generator is the same machine as a DC motor...  So if you're building something for your home, then just use a DC motor and a simple belt an pulley to reduce the rotational resistance (or load) on the blades, so a slower wind can be used...\n\nFor a Science project...  \nBuid three loops of wire and seperate them 60° on the rotor of the wind mill.  Place a magnet on either side. north to south\nSet up "brushes" (chunks of graphite like pencil lead) on either side so that as the rotor spins with the wind, the same side is going to the same terminal + or - no matter which side of the coil it is.\n\nHave fun with it...
117405
Generators (AC or DC) can be manufactured to produce output from either the rotor or the stator.  If from the stator, the output is AC and one or more diodes are needed if DC is wanted.  If from the rotor, the current within the rotor is AC and can be (1) picked off with slip rings, providing AC, and converted to DC with diodes if needed, or (2) picked off with commutator and brushes if DC is needed.\nSo one answer to the question would be, ...except that any DC generator must use commutator/brushes or diodes.\nI guess you have listed multiple-choice options.  If so the only correct answer is #2.
404423
A simple AC electric generator simply involved rotating a magnet inside a coil, or rotating a rectangular coil inside a magnetic field (which is a little trickier requiring conducting rings at the ends of the coil and carbon brushes to connect the rotating coil to the external circuit).\n\nAs the coils pass through the magnetic field, the current induced is proportional to the strength of the magnetic field, the speed at which the coil passes through the field, and the area of the coil, and the number of turns in the coil.\n\nThe maximum electromotive force generated in each turn of the coil, (essentially, the voltage amplitude of the AC current produced), is given by:\n\nEMF = NBAw\n\nN = number of turns in coil\nB = magnetic field\nA = area of coil\nw = angular frequency of coil = 2 pi / T  \n(T = period)\n\n A single loop of wire passing slowly thought a weak magnetic field will produce the lowest possible current, which will appear alternating pulses if measurable at all. Increasing the contributing factors slowly will allow you to find the threshold at which AC current can be detected.
834512
Torque is not the right question to ask in this problem!\nFirst define the generator output in terms of watts.\nAssume an efficiency of 0.8 for the generator and define the Input of the generator (In = Out / 0.8).\nThis is the output of your motor (assuming some diesel/petrol).\nTorque is expressed as N/m (force x radius) and is part of the electric generator specs.  See there to get the equivalence.\nUsually, the motor power is also 0.8 efficient, so the motor power should be W / (0.8*0.8) and that will give you the right ratio.
183820
A generator is basically a motor that works backwards.  \n\nIn a motor, a wire coil is wound around a magnetic core but not attached to it. The magnetic shaft has bearings either end to allow it to rotate. When current goes through the coil it makes the magnet rotate (electromagnetic induction).\n\nIn a generator, the magnet shaft is rotated by a small diesel engine with a pulley and belt.  The movement of the magnet shaft inside the coil induces electrical current in the wire coil.\n\nCheck www.howstuffworks.com for a decent write up with diagrams.
864668
First, what is the input voltage and the desired output voltage?  Is the output voltage fixed, or do you need a range of adjustment (taps)?  Do you need isolation between the input and the output?  If not, an autotransformer (single winding) might be acceptable.  What is the frequency, and is it single phase, three phase Y, or three phase delta?\n\nNext, what is the power rating?  Small transformers are usually rated in output current, whereas larger transformers are rated in KVA.  This is the maximum load;  a smaller load would not be a problem.\n\nFinally, what are the mechanical factors?  Does it need to be hermetic or can it be open frame?  Do you want terminals or wire leads?  What shape and size?  What is the mounting?\n\nIt's not really that hard.  Usually you can browse through a catalog and find the transformer you need in minutes.
948920
All rotating electrical machines can be classed as either "motor" or "generator". The definition is based on the direction of electrical power flow. A motor requires electrical power to provide rotation (and hence useful torque); a generator is driven by an outside torque source to produce electrical power.\n\nFor a machine to work, there has to be a magnetic field created to transfer the mechanical power to/from the stationary portion to the rotating portion.\n\nFor the case of an induction generator, an outside force rotates the shaft of the electrical machine. (You can assume here that the rotor has been magnetized through the use of an external capacitance circuit to provide discrete magnetic poles.) The rotation of the magnetic field, through mechanical means, induces a current to flow in the stator winding. Since the winding is a resistive path, there will also be a potential developed.\n\nThe output (volts and amps) will both be sine waves, operating at a frequency dependent on the rotational speed of the rotor and the number of poles.
478080
Is this for an electric motor or an engine? \n\nNEMA National Electrical Manufaturers Association) has a standard set of starters for electric motors. Try a web search, I bet you will find what you want if you are talking about an electric motor.
539640
Okay it seems that you have a dc motor, a transformer and a switch. I would imagine the transformer is a multi-tapped step down. You can verify this by disconnecting all the secondary wires from the transformer and putting power to the primary. Get a meter and go from the common on the secondary side and to every output on the transformer. If the wires on the transformer are color coded the common may be black and the hi output may be red. Other colors will be different voltages. If this is the case the switch is wired with the exception of the secondary common through multiple poles to provide different voltages to the motor. The switch will have a common output and all other wires will be inputs from the transformer. The output of the switch then must go to a rectifier of circuit board that converts the voltage from ac to dc. This connects to the motor. You might be missing the ac to dc converter circuit if you dont see a circuit board or Bridge rectifier. If you go throught the switch wiring and get it set up to where you have different voltages at the output of the switch you can always go to your local parts store and buy a 2 amp bridge rectifier. The common output of the transformer will have one wire going to one of the ac sides of the rectifier and the other will go to the other ac side of the rectifier. The two remaining outputs will go to the motor and polarity will not matter. Hope this helped!
1012328
In certain circumstances... If the motor you are using is coming directly out of a modern washing machine you are dealing with a 3 phase ac motor. in order to power it up you will need a 3 phase AC generator most likely connected to the pedals. if you are dealing with  a DC motor, then the bey way to handle it would be a DC generator, and a capacitor. The Cap will charge to a certain value and give you the voltage/current = power needed to crank the bike initially.
300542
"An assembly consisting of a magnet mounted on a frame, and a wire coil (armature) that can be rotated within the magnetic field. The function of the generator is to convert mechanical energy into electrical energy."\n\nBasically in a generator you can induce current by rotating a magnet inside a wire coil.  The opposite of this is a motor in which the electricity causes mechanical movement.
115670
A generator is a machine that converts mechanical power to electrical power, by making a conductor cut across a magnetic field's lines of force.  This is done by moving either the conductor or the magnetic field.  Current flows in the conductor if its ends are connected to an electrical load thus producing electrical power.  Because an opposing magnetic field is created by the current in the conductor, it requires mechanical energy to maintain this motion.
1084125
My God, I've never seen so much misinformation and confusion in my life.\n\nThe word "generator" is a generic name for a rotating machine which converts mechanical energy into electrical energy.\n\nThere are two types.\n\nOne type of generator is a dynamo, which produces d.c.\n\nThe other type of generator is an alternator, which produces a.c.
905984
Not just any A/C motor will.\n\nCurrent is generated by ,,"Waving a MAGNET past a COIL"\n\nUsing a NON-Magnet produces nothing.\n\nMost A/C motors do not have permanent magnets.\n\nA/C Motor's "magnetism" is typically created by the Supply Current---Electromagnetism\n\nA/C motors can be converted to generate,,but it's not so simple as just spinning the shaft of a DC motor or any permanent magnet motor.\n\nThere's stuff all over the net which explains what type A/C motor is easiest/best to convert,,and what's required.\n\nhttp://users.aber.ac.uk/iri/WIND/TECH/MISC/MotorsAsGenerators.html\n\nhttp://www.otherpower.com/otherpower_wind_alternators.html
952593
An electric generator is a device used to convert mechanical energy into electrical energy.\n\nThe generator is based on the principle of "electromagnetic induction" discovered in 1831 by Michael Faraday, a British scientist. Faraday discovered that if an electric conductor, like a copper wire, is moved through a magnetic field, electric current will flow (be induced) in the conductor. So the mechanical energy of the moving wire is converted into the electric energy of the current that flows in the wire.The mechanical energy needed to turn the generator comes from the brown hand crank at the front of the generator. In a hydroelectric power plant, the mechanical energy to turn the generator comes from the water turbine, which is turned by the force of falling water. The hand crank causes the red wire to spin inside a magnetic field (the blue lines). As Faraday learned, moving the wire through the magnetic field causes electric current to flow in the wire. The turning red wire is connected to a volt meter, which shows the amount of electric current that is produced. In a hydroelectric plant, the generator is connected to transmission lines that deliver the electricity to your home or business.\n\nThe controls allow you to control the speed and direction of the generator and turn portions on and off for greater clarity. You can also use the radio buttons to show a direct current, or DC generator (with commutator) or an alternating current, or AC generator (without commutator).
1126159
"Because it lacks a separate field circuit, an induction generator cannot produce reactive power.  In fact, it consumes reactive power, and an external source of reactive power must be connected to it at all times" [1].\n\nSo you are right that you will need a three-phase capacitor bank at the output terminals (delta-connected).\n\nHow to size the capacitors?\nThat depends on a few things.  Namely what kind of loads are going to be attached to it.  I presume this is going to be an emergency generator operating alone (most induction generators are used this way nowadays).  In that case, your capacitor bank will need to account for the generator consuming reactive power and the loads consuming reactive power.\n\nSo, if you know what you are going to connect to the generator, figure up an estimate of the total reactive power of your loads.  Then estimate how much reactive power your generator consumes (not sure how to do this; maybe estimate from your 7.5kW and 9.4kVA ratings?).\n\nFinally, to size your capacitors equate the total power consumed by gen and loads to this formula:\n\nestimated_3phase_power_consumed = 3*(line-to-line_volt)^2/X\nwhere X = 1/(2*pi*freq*C)\n\nSolve for C and there you go.  My source indicates that the output voltage for an induction generator can vary quite a bit with varying inductive load, so bear that in mind and maybe oversize the caps a bit.  Also, the types of capacitors should be able to withstand AC obviously and be rated within your expected operating temp, etc, etc.\n\nGood luck.