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Subsynchronous converter cascade SCC
Subsynchronous converter cascade SCC

High-voltage switch using series-connected
High-voltage switch using series-connected

... the best candidate from low- to high-power applications because it has advantages which include high voltage/current rating, fast switching, and easy drive capabilities. The recently presented IGBT has a 6.5-kV/3-kA rating. In recent years, the demand for high-voltage conversion applications, such a ...
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Winding Failures of Electrical Motors
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... either electrical, mechanical or environmental, the winding life will be significantly reduced. The pictures given below show what can happen to the electric motor winding and it can help to identify the causes for the failures so that preventative actions can be taken. The defects shown in pictures ...
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... These extremes falls within the range of operation of the Hamamatsu H10682 PMTs we will be using, which is 4.75v to 5.25v. Other than the resistor network, the switching regulator requires a few more components to fine tune its functionality. First, a few capacitors are needed: an input capacitor, o ...
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... fully-featured, high-performance inverter output stage for AC Induction, BLDC, and PMSM motors. These modules integrate optimized gate drive of the built-in IGBTs to minimize EMI and losses, while also providing multiple on-module protection features including under-voltage lockouts, over-current sh ...
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... V = IMAX × R = 0.36 V. Further protection can be provided with transient voltage suppressors (TVS) or transorbs. These are available as both unidirectional and bidirectional suppressors, and in a wide range of standoff and breakdown voltage ratings. Size the TVS with the lowest breakdown voltage pos ...
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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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