how are cycloconverters used for induction heating?
971174
Cyclo converters are used to generate power with different frequencies. Once we have a different frequency wave form is availabe, it can be used to generate heat by induction with the help of other waves of different frequencies due to frequency mismatch issues etc.
755807
In order to know how 3-phases of voltage (separated by 120 degrees) are produced, one would have to know how a 3-phase generator works and know a bit about electromagnetic theory.\n\nIn nearly all power plants (except for some wind turbines), a 3-phase synchronous generator is used.  This type of generator has one or more wire coils attached to the shaft (the rotor) and a set of coils evenly spaced around the frame surrounding the shaft (this area is known as the stator).\n\nThe coils on the rotor are energized by a small DC source and become constant electromagnets with north/south poles determined by the direction in which the current flows.  The shaft is moved by a source of mechanical power.  Generally a steam turbine is used where the steam is heated from some source of energy like coal, natural gas, nuclear etc.\n\nSo as you can imagine, we have one or more electrogmagnets attached to a shaft being rotated by a turbine.  Remember that these rotating electromagnets are inside the evenly spaced windings on the stator.  Faraday's law states that a time-changing magnetic flux in a coil will produce a voltage in that coil.  Since the rotor electromagnets are constantly changing position relative to the stator coils, the magnetic flux seen by the stator coils is also constantly changing.  The wire coils on the stator frame are evenly spaced such that the induced voltage waveforms will be spaced 120 degrees apart.\n\nSo, we then have sinusoidal voltage waveforms produced on the stator coils such that they are 120 degrees apart.  These coils on the stator are then connected in either wye or delta configurations and carefully hooked up to the power grid.\n\nSo that is a somewhat simplified view of what is happening.  There are various other complications that I have not mentioned, but are not important in getting the general idea.  You might be able to find a nice 3-phase electric generator animation on howstuffworks.com or Wikipedia.
118060
It is used to generate electricity.
679718
The deciding factor here would be the Utility Company Service Entrance. THAT cannot be rewired by you! The other two points ( Low side of transformer and Motor Windings) can easily be configured either way by simply rewiring the 3 windings on the motor, and the 3 windings on the output of the transformer.\n\nOptimum efficiency will be DELTA-DELTA-DELTA or STAR-STAR-STAR...Either way no 'ground loops' to cause loss.
890360
I have already answered part 1. in another question you've asked. I think you probably didn't use the right units (like cm needs to be convered to meters) and got the wrong answer.\n\nNow for part 2:\n\nInduced EMF, ℰ = -L(di/dt)\n\nwhere i is the current and L is the inductance\n\nWe are given that the magnitude of the induced current,\n\ndi = 47 mA\n\nand the oscillation frequency is 100 Hz. This means that dt = 1/f = 0.01 sec\n\nWe have L = 8.44 × 10-^3 henries from before\n\nSo |ℰ| = L(di/dt) = -(8.44 × 10-^3)(0.047)/(0.01) = 0.0397 volts\n\n------------------------------------------------------\n\nNow part 3 has to do with mutual inductance:\n\nVs = VpNs / Np\n\nwhere \n\nVs is the voltage across the secondary inductor, \nVp is the voltage across the primary inductor (the one connected to a power source), \nNs is the number of turns in the secondary inductor, and \nNp is the number of turns in the primary inductor. \n\nTherefore Vp = VsNp/Ns and Vs = 0.0397 volts as calculated before, so\n\nVp = (0.0397)(197)/(2920) = 0.00268 volts
95109
This might help\n\nhttp://www.ttec.co.tt/consumertips/conserveelectricity/default.htm
443133
hi,\n\ntransformers you can buy for pretty cheap at any decent electronics or  hobby stores (radio shack sucks these days, but they probably still have them).  \n\nhowever you can make them really easily.  all you need is a hunk of steel or iron (some kind of rod-shaped thing would work, as would a donut-shaped loop).  take one wire and wind it around the piece of steel N times.  take another wire and wind it around a different part of the steel M times.  congratulations, you have just built a transformer that will step up/down voltages by a factor of M/N (or N/M, if you hook it up the other way.)\n\ncheers-
777644
We do use electromagnetic fields to transfer current. Every day.\n\nIt's a necessity in the power industry! The device is called a "transformer".\n\nThe major limitation for use is dependent on both the strength of the originating magnetic field and the distance to the conductor which is have current induced. The resultant current is less, in proportion to the square of the distance between the conductor and the field source. It is also less in proportion to the magnitude of the originating field.\n\nThe actual induced current is achieved by passing a conductor through a stationary magentic field (in which case the frequency of the current waveform is proportional to the speed of the conductor's movement), or by oscillating the magnetic field at some frequency compared to a stationary conductor (in which case the frequency of the current is the same as the magnetic oscillation frequency), or by a combination of the two.\n\nBelieve it or not, this is exactly how rotating electrical machines work. Alternating Current machines vary the magnetic field in the stator using an AC waveform for stator current (and induce currents in rotor components). Direct Current machines mechanically induce an alternating field in the rotor by rotating the conductors through a fixed magnetic field.
119437
Magnetic induction can introduce quite a bit of error on a thermocouple wire run.  The best way to determine its effect is to measure the thermocouple voltage with the magnetic source on and again with it off.\n\nTo mitigate the effects, first route the thermocouple wire as far away as practical from the magnetic source, though keeping the run as short as practical.  Second, shield the cable.  Third, use a balanced cable such as a twisted pair.  The effects of the induction will largely cancel itself out since it will induce opposing currents in each of the wires with a twisted pair.\n\nIf the magnetic source is high frequency, you can try using toroids at the ends of the cable run to absorb the induced current as well.
470470
I'd like to know exactly what you're trying to do. Using the wrong type of capacitor or one with the wrong values could explode and burn. I'm talking about a pretty violent explosion at 110 VAC!  A Snubber will not work because that is now what they are for. A snubber is used on the gate of SCRs to prevent false retriggering especially on high power circuits. What you need is a Thermistor. This is a flat round device with two wires coming out of the edge. The thermistor will be put in series between the power switch and the capacitor. At normal room temperatures the thermistor might have about 50 Ohms of resistance. When it warms up, (almost instantly), the resistance drops to about zero. This action limits and controls the initial power surge into the capacitor when the switch is thrown thereby preventing damage to the switch. You need to know the voltage and current load to select the right thermistor otherwise it becomes smoke.\n\nPlese use caution: Capacitors can store huge amounts of power and will COMPLETELY DISCHARGE IMMEDIATELY.\n\nA large capacitor, when shorted out, can blow a 1/4 inch screwdriver in half! Sounds cool but the missing part is burning molten metal flying at you! Please be Careful!
330815
"Each hob contains one or more coils made of ferromagnetic material. When an alternating current is passed through these coils, a magnetic field of the same frequency is produced. If a magnetic-based pan is placed on the hob, the magnetic field induces a current in the pan. The internal resistance of the pan causes heat to be dissipated, following the Joule effect. Thus it is the pan itself, and not the cooktop, that heats up and cooks the food. Once the pan is removed from the cooktop, the energy transfer stops. The result is a flame-less method of cooking in which it is nearly impossible to start a fire by forgetting to turn off the stove. Parents won't have to worry about their child touching a hot burner because the cooktop surface remains cool. Changing cooking temperatures is achieved quickly because there is no wait for the hob to heat up, only the pan. Since there is no transfer of heat energy between the hob and the pan, less heat is lost into the air, resulting in a more efficient means of cooking, not to mention a more agreeable cooking environment."\n\n\nhope that help?  we just renovated our kitchen and have installed a Miele induction cooktop and it works wonderfully.  It provides much greater control over temperature...and I am still shocked at how quickly water comes to a boil.  Who knew a stove would be so exciting? haha.
23227
It uses a permanent magnet which is rotated by a crank. The spinning magnet is positioned so that its north and south poles passed by a piece of iron wrapped with wire. It was discovered that the spinning magnet produced a pulse of current in the wire each time a pole passed the coil. Furthermore, the north and south poles of the magnet induce currents in opposite directions. By adding a commutator, it is possible to convert the alternating current to direct current.
1096290
I suspect you may have to install seperate systems and in respect of central heating you would have to have isolation valves to allow transfer from pressurised to gravity fed system - it would be complx but technically acheivable - I currently run two seperate heating systems in a now combined house (formerly two) and have considered this.\n heating of mains pressure water via wood stove boiler and or solar would be difficult and therefore a gravity fed system would be required.\nThorough planning and installation of switching options is required
546849
You cannot, as was stated earlier.  You need to get a motor rated for 240VAC. You do have the option of using a step-down transformer (or step-up as the case may be). Of course, transformers aren't cheap either, so I would definitely recommend getting an expert in to look at the problem and help you find a solution.
375937
there are 2 ways:\n1. using a thermocouple u will generate a potential difference. but the thermocouple will not generate much current so the power will be small.\n2. this is a classical method. a steamengine coupled to a dynamo.
293299
Yes. In an induction disk meter there is a spinning disk which spins faster if you use more power. an optical sensor can be used to sense this speed and input into the totalizing circuits.
1124971
No. If you could, you'd have solved the energy crisis with your perpetual motion machine. The gas engine only provides 5hp so the most you can get out of it is 5hp. The engine is a 120hp so it will need 120hp to run at full power, so your generator will need to deliver at least 120hp. If this would work, you could feed the electric motor back to the generator and use 5hp to drive the generator and leave an excess of 115hp to use as you wish.\n\nIn Reality:\nElectric motors and generators are about 90% efficient.\nCombined cycle electricity generation as used in power stations from natural gas and fossil fuels can give overall 60-65% efficiency and this will probably be more efficient than your motor driving a generator.\n\nSo, you will theoretically get from the shaft of the electric motor 5hp(shaft power from IC engine) *90%(generator efficiency)*90%(motor efficiency) =4.05hp at effectively 80% efficiency.\n\nAlternatively, to run your electric motor at full power you would need an IC motor of 150hp to allow for the 80% efficiency of the generator-motor  combination.