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Modeling and Control of the PFC Stage for a 50KW EV Fast
Modeling and Control of the PFC Stage for a 50KW EV Fast

... feasible solution, the FC must satisfy both the grid code in terms of THD and power factor from the utility side and lithium-ion charging modes from the battery side. Since the BSS usually contains multiple FCs, its impact on the distribution grid is very significant, as was shown by previous resear ...
Configuring Network Settings for Your LifeSize PhoneTM
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... Verify that power is supplied correctly to the unit via PoE. If your network connection does not have PoE you must use a PoE adaptor between the network connection and the phone to supply power. Inspect connections to any system cables and ensure there are no obstructions or loose cables at either e ...
Power Quality Problems and Solutions
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... Along with technology advance, the organization of the worldwide economy has evolved towards globalization and the profit margins of many activities tend to decrease. The increased sensitivity of the vast majority of processes (industrial, services and even residential) to PQ problems turns the avai ...
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... characteristics for given solar irradiation. The essence of the approximation task is the simplified Shockley’s equation and consistent nonlinear and parametric correction of power losses within the panel. The output is a particular mathematical model with very good agreement with measured data. The ...
The MWS T Cable (TC)
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... controller. An inner feedback loop is used to regulate the STATCOM instantaneous reactive power current Iq shunt, reminding that this control is achieved only by controlling α, of the inverter output voltage relative towards the transmission line voltage, this technique makes it possible to maintain ...
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GMM112 and GMW115 Quick Reference Guide in English
GMM112 and GMW115 Quick Reference Guide in English

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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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