23-07-2016, 10:25 AM
A homopolar generator is an electrical generator to power continuous comprising a disc or electrically conductive cylinder rotating in a uniform static plane perpendicular to a magnetic field. A potential difference is created between the center of the disc and the rim (or the ends of the cylinder) with an electrical polarity depending on the direction of rotation and the orientation of the field. It is also known as a unipolar generator, acyclic generator, disk dynamo, or Faraday disc. Voltage is generally low, of the order of a few volts in the case of small demonstration models, but the large generators of research can produce hundreds of volts, and some systems have multiple generators in series to produce even greater tension. [1] they are unusual in that they can provide enormous power, some more than one million amps, because homopolar generator can be made to have a very low internal resistance.