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Stories about: direct current

How Mercury Arc Valve Rectifiers Work An electrical rectifier is a device used to convert alternating current into direct current. Most of the rectifiers currently available on the market are based on solid state devices, regardless of application, although before the 1960s and prior to the development of high voltage solid state devices mercury arc valv... 17 July 2008 09:01 GMT How Brushless DC Motors Work Brushless DC electric motors are a design variation derived from the old brushed electric motors except that the relative motion of the rotor and the stator is reversed. To understand how this is done, one must first understand the basic construction and operation of a brushed DC electric motor. Typical DC motors imp... 5 May 2008 09:11 GMT