What is hysterisis in the core of a transformer?
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Hystrerisis is a event, which happens in cores of transformer. This happens due to residual magnetism in core which is unable to change in the time when field direction changes ,due to alternative magnetic field. The heat loss, which is generated in this condition, can be calculated by calculating the area of B-H curve
702129
I've found a good site introducing and explaining the voltage and phase relationships between delta and wye 3 phase transformers. Try www.elec-toolbox.com/usefulinfo/xfmr-3ph.htm\nI hope that this proves useful for your research.
206554
1 amp (1000 millamps) is the maximum rated operating conditions for the transformer.  You may be able to get more current than that from the transformer, but the rest of its specifications (such as output voltage, operating temperature, efficiency, etc) are no longer guaranteed to be accurate.\n\nIt would be a good idea not to exceed this current draw if you want the transformer to last, and not pose a fire danger.  Consider using a fuse in your circuit to prevent overcurrent conditions.
222925
Dig here:\nhttp://www.scientifics.com/transformers.htm
141129
Transformer is an AC machine rated in terms of Voltamperes and Primary and Secondary voltages. The primary and secondary windings are thus rated to carry a certain amount of current. To protect the transformer windings from overcurrent due to overloading an overcurrent relay is used to sense the overcurrent and trip the breaker feeding the transformer.Overcurrent protection of transformers are usually met by utilising relays with Inverse Definite Minimum Time characteristics like, Normal inverse/Very inverse. That is the relay takes some time to operate depending on the extent of overloading.Relay operates faster for more overloading and slower for lesser overloading.The relay picks up only if the transformer is loaded more than 110% of it's rating.\n\nDifferential protection is used for instantaneous tripping when a fault takes place inside a transformer winding.The relay does not operate for overloading.Differential protection is a zone protection. The transformer primary and secondary windings are covered in the differential zone using differential current transformers on both primary and secondary sides. The differential relay compares the currents on both primary and secondary sides and acts on imbalance over a given set value.Hence relay does not operate for normal or overloading.However for a fault in zone, there will be a major imbalance in the circulating current which will operate the differential relay.
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Hysteresis is the slight difference between how something reacts going one way compared to how it acts going the other way.\n\nA typical example is a magnet. As it magnetizes, it passes through the origin (the point at which 0 electric field intensity equals 0 magnetic field intensity). This is because the initial charge of magnetism is going into an "empty" container, so to speak.\n\nHowever, when the magnet is demagnetized (or the field is flipped to the opposite polarity), there will be a small amount of "residual" magnetism from the first charging that will tend to "fight" against the reversal. What this really means is that the reverse polarity charge does not follow the exact same path ... and does not pass through the initial origin at all.\n\nYou could look at this as filling and then emptying a glass with water - the first time you fill it, the glass started out completely dry ... which meant you could put X many molecules of water into it. Then you dump it out ... but a few molecules remain adhered to the glass surface (this would be the residual). The next time it's filled, you add as much as the first time (less the residual).\n\nWhen you empty it again, it leaves a couple of molecules attached. Not necessarily the same ones as the first time, but approximately the same amount. Hence there is now a hysteresis effect occurring when you fill/empty the glass.
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Impedance is related to alternating current Circuits.\nResistance is related to direct curent circuits. It has the Unit of inverse velocity. hence resists the motion of electrons in a conductor and as a result dissipates heat energy.Hence it is considered as a heat dissipating device..\n\nReactance is an energy storing device and is associated with coils which are magnetic energy producing device.\n\nHence a reactance stores energy and then gives it back .\n\nImpedeance is the sum of resistance  plus reactance but reactance is 90 degrees out of phase. Hence reactance is \ndescribed as imaginary quantity where resistance is real quantity.\nResistance is real because it dissipates energy and reactance is imaginary be cause it stores energy as magnetic and does not dissipate as heat energy.\nImpedeance in a circuit folows the same circuit rules as resistance.
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(m)\n\n transformer is an electrical device used to convert AC power at a certain voltage level to AC power at a different voltage, but at the same frequency. \n\nThe construction of a transformer includes a ferromagnetic core around which multiple coils, or windings, of wire are wrapped. The input line connects to the 'primary' coil, while the output lines connect to 'secondary' coils. The alternating current in the primary coil induces an alternating magnetic flux that 'flows' around the ferromagnetic core, changing direction during each electrical cycle. The alternating flux in the core in turn induces an alternating current in each of the secondary coils. The voltage at each of the secondary coils is directly related to the primary voltage by the turns ratio, or the number of turns in the primary coil divided by the number turns in the secondary coil. For instance, if the primary coil consists of 100 turns and carries 480 volts and a secondary coil consists of 25 turns, the secondary voltage is then: \n\nsecondary voltage = (480 volts) * (25/100) = 120 volts \n\nA transformer may have multiple secondary coils to feed a number of electrical loads; however, power must be conserved, so the sum of the output power must equal the sum of the input power minus losses. Energy losses in transformers are due to a number of factors: these are copper losses in the coils themselves due to material resistance, core losses due to hysteresis (the reluctance of the material's magnetic domains to reverse during each electrical cycle), and eddy currents.
602130
This happened so long ago to suggest there should have been a standard is funny.  The frequency has more to do with the speed of the turbine and the number of poles on the generator.  Early US generation was actually 25Hz.  The larger the frequency the smaller the transformers and motors are, but also the higher the losses (inductive reactance is proportional to frequency).  So there isn't necessarily a perfect frequency to use.
1105032
The atoms of iron line up with the magnetic field produced by the changing voltage.  This prevents the magnetic field (and thus, electric field) from decresing so quickly  This effect greatly increases the efficiency of the transformer.
79642
Those guys (arc welding power supplies) have high voltage inside, but they output low voltage at high current.\nTry old neon transformers, oil burner ignition transformers (but you need some high-voltage diodes for DC), a discarded TV set (but very dangerous, HV can be stored in various places when you open it). \nFor battery ops you might be able to gin something up with an ignition coil and some sort of primary current interrupter but you'll get pulses, not DC. If you're into DIY, you can rip the flyback transformer from a TV and follow the directions in the ref. Many more such projects if you google High Voltage Inverter". Good luck.
390904
a ditisbution transformer is much larger . but they both do the same job .they either step up or step down current.
822827
If it is pretty loud and then fades away, this is the degauss feature.  If it just makes a high frequency noise then you probably have the flyback transformer starting to go bad.  It will probably still last a while though.  They can run as high as 70 or so bucks.  The labor and time spent looking for the right part do not warrant repair.  buying a new monitor would be your best bet.
644077
The voltage at which the attractive forces between the capacitor plates overpowers the fasteners.\n\nTake a look\n\nwww.math.ubc.ca/~ward/papers_ps/memspap.pdf
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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
743760
1.a) receives the alternating current. \n b) the magnetic properties are altered by the electromagnetic field. . \nc) by the alterations in the core induces other alternating current in this coil. \n2.a) because the alternating current induces the varying magnetic field.\nb) that magnetic flux is passed by the core to the secondary coil.\nc) yes an alternating one. \n\nBecause radioactivity destroy organic tissues.
849597
Both inductors and capacitors store energy, in the form of magnetic or electric fields, respectively, so they have some possibility of discharging that energy in a dangerous way. Shorting out a large capacitor, for example, would produce a large current. Overheating an inductor (too much current) might cause the coil to fail, and then the magnetic field decay would produce a voltage spike I think. I would assume the risks with small components are quite small.