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The Transfrormer
The Transfrormer

... Windings on transformers or other electrical machines are marked to indicate terminals of like polarity. Consider the two windings shown in Fig.3.7a. Terminals 1 and 3 are identical, because currents entering these terminals produce fluxes in the same direction in the core that forms the common magn ...
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... 100 watts of active power in order to create light (and heat). Energy, per definition, is the measure of how much work has been required over a known period of time. In the light bulb example, leaving the bulb on for an hour it will consume 100W x 3600s = 360000Ws (watt-seconds) = 100Wh (watt-hours) ...
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Advantages and Disadvantages of Different Concepts of
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... power real time clocks. The following instructions must be implemented for proper operation. In order to reduce power to the lowest level possible, the input load capacitance on the XO and XI pins on the CBC348X3 devices have been purposely designed to be as low as possible and still retain good sta ...
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Rectifier



A rectifier is an electrical device that converts alternating current (AC), which periodically reverses direction, to direct current (DC), which flows in only one direction. The process is known as rectification. Physically, rectifiers take a number of forms, including vacuum tube diodes, mercury-arc valves, copper and selenium oxide rectifiers, semiconductor diodes, silicon-controlled rectifiers and other silicon-based semiconductor switches. Historically, even synchronous electromechanical switches and motors have been used. Early radio receivers, called crystal radios, used a ""cat's whisker"" of fine wire pressing on a crystal of galena (lead sulfide) to serve as a point-contact rectifier or ""crystal detector"".Rectifiers have many uses, but are often found serving as components of DC power supplies and high-voltage direct current power transmission systems. Rectification may serve in roles other than to generate direct current for use as a source of power. As noted, detectors of radio signals serve as rectifiers. In gas heating systems flame rectification is used to detect presence of a flame.Because of the alternating nature of the input AC sine wave, the process of rectification alone produces a DC current that, though unidirectional, consists of pulses of current. Many applications of rectifiers, such as power supplies for radio, television and computer equipment, require a steady constant DC current (as would be produced by a battery). In these applications the output of the rectifier is smoothed by an electronic filter (usually a capacitor) to produce a steady current.More complex circuitry that performs the opposite function, converting DC to AC, is called an inverter.
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