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Double Sheet Detector R1000 Series UDK10
Double Sheet Detector R1000 Series UDK10

... In the sheet processing industry, but especially the automotive industry, not only steel but increasingly aluminum and other non-ferrous materials are used. When loading blanks into presses automatically, feeding double blanks must be prevented. The UDK10 was specifically developed for these applica ...
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... varied as a function of the active power p supplied by the inverters through the p–ω control law. The magnitude of the output voltage V is varied as a function of the reactive power q supplied by the inverters through the q–V droop control law. Voltage controllers are then implemented for the invert ...
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... equivalents have been partitioned in UHVDC transmission project from Xiangjiaba to Shanghai so as to relax the conditions for filter design. A fast calculation of harmonic current which is applied for filter design in projects has been proposed in references [3-4].In order to adjust and design filte ...
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... Working with Professor Bill Hansen at the Stanford Physics Department, as Research Associates, were the Varian brothers, Russell, a physicist, and Sigurd, a former barnstormer and Pan-American pilot. “Sig” Varian believed that high-frequency transmitters could be used aboard airplanes to make “blind ...
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Power over Ethernet



Power over Ethernet or PoE describes any of several standardized or ad-hoc systems which pass electrical power along with data on Ethernet cabling. This allows a single cable to provide both data connection and electrical power to devices such as wireless access points or IP cameras. Unlike standards such as Universal Serial Bus which also power devices over the data cables, PoE allows long cable lengths. Power may be carried on the same conductors as the data, or it may be carried on dedicated conductors in the same cable.There are several common techniques for transmitting power over Ethernet cabling. Two of them have been standardized by IEEE 802.3. Since only two of the four pairs are needed for 10BASE-T or 100BASE-TX, power may be transmitted on the unused conductors of a cable. In the IEEE standards, this is referred to as Alternative B. Power may also be transmitted on the data conductors by applying a common-mode voltage to each pair. Because twisted-pair Ethernet uses differential signalling, this does not interfere with data transmission. The common mode voltage is easily extracted using the center tap of the standard Ethernet pulse transformer. This is similar to the phantom power technique commonly used for powering audio microphones. In the IEEE standards, this is referred to as Alternative A.In addition to standardizing existing practice for spare-pair and common-mode data pair power transmission, the IEEE PoE standards provide for signalling between the power sourcing equipment (PSE) and powered device (PD). This signaling allows the presence of a conformant device to be detected by the power source, and allows the device and source to negotiate the amount of power required or available. Up to a 25.5 watts is available for a device.
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