• Study Resource
  • Explore
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
012183189U
012183189U

... harmonic current cannot be blocked by the transformers, it is important to find out whether there magnitudes are acceptable for the network from the viewpoint of power quality. The equivalent network of the DPFC at the 3rd harmonic can be represented as Fig.7. To reduce the magnitude of the3rd harmo ...
Industrial Networking
Industrial Networking

... Moxa’s comprehensive product portfolio and vertical expertise enable smart network architectures that allow factories to use both existing and new equipment to increase production and uptime, and improve operational efficiency. ...
integration of artificial intelligence control to the unified power quality
integration of artificial intelligence control to the unified power quality

... and negative-sequence current, and regulate the dc-link voltage between both active power filters. It can be configured either with voltage-source converters or current source converters in single phase, three-phase three wire, or threephase four-wire configurations. The block diagram of the UPQC is ...
Feedback Control of Five-Level PWM Rectifier: Application to the S
Feedback Control of Five-Level PWM Rectifier: Application to the S

... application of the proposed feedback control algorithm to the rectifier shows a good voltage tracking. Feedback control algorithm of the rectifier associated with clamping bridge filter makes stable the input DC voltages of five-level APF. The proposed control algorithm opens the door to different a ...
Aalborg Universitet Research
Aalborg Universitet Research

... grid connections will be made by connecting the offshore HVDC terminal either on the AC and/or on the DC side of the converter (Figure 1a and b). As large OWPP clusters are distributed over a large physical area with different wind conditions it is possible to optimise the utilisation and loading of ...
Aalborg Universitet An Analysis of Modified Demodulation-Based Grid Voltage Parameter Estimator
Aalborg Universitet An Analysis of Modified Demodulation-Based Grid Voltage Parameter Estimator

... Different approaches have been proposed in the literature to estimate the fundamental parameters of the grid voltage. The zero-crossing detection (ZCD) based method is probably the simplest one. The ZCD approach, however, suffers from a poor performance under noisy and harmonically distorted conditi ...
P2 / P5 Manual
P2 / P5 Manual

... specified by the manufacturer or have the same characteristics as the original part. Unauthorized substitutions may result in fire, electric shock, or other hazards. 20. Safety Check – Upon completion of any service or repairs to this product, ask the service technician to perform safety checks to d ...
SDP Product Series Introduction
SDP Product Series Introduction

... performance of the SDP / SEP. Just watch out for Rule ...
[PDF]
[PDF]

On Power Quality of Variable-Speed Constant
On Power Quality of Variable-Speed Constant

... eliminate harmonics, correct supply power factor, and to minimize the effect of unbalanced loads. A three-phase-based current-controlled voltage-source inverter is used as an APF. The control algorithm for the APF is based on the perfect harmonic cancellation method which provides a three-phase refe ...
MI2420432050
MI2420432050

... low efficiency and high as well as wide-range intermediate dc bus voltage stress . To solve the input current harmonics problem in a single-stage, the “dither-rectifier” concept was introduced with the conceptual Single Stage PFC structure in Fig. 3, in which, a high frequency “dither source” is bet ...
Implementation of Efficiency Enhancement Techniques in the Linear
Implementation of Efficiency Enhancement Techniques in the Linear

... voltage V1, an inductor can be placed in shunt to resonate out the capacitive reactance. In addition the output of the other power amplifier 2 with output voltage V2, a capacitor can be placed in shunt to resonate out the inductive reactance (Fig. 3). IV. D OHERTY C ONFIGURATION In 1936 W.H Doherty, ...
GB3411111120
GB3411111120

... Fig. 1. Circuit configuration of the proposed PV charger partial charging modewherein the available maximum PV power is larger than theload power and the excessive power will charge the battery, butthe charging current is still less than the preset charge The circuit configuration of the proposed PV ...
Induction welcomes you
Induction welcomes you

... DDP-3). By utilizing a pan recognition sensor built into the coil, it can automatically adapt itself to accommodate pans ranging in size from 4” to 14”. This feature is exclusive to Diva Induction. Easiest of all, they are powered by your fingertips on a flat control pad built into the glass. It is ...
Light-Load Efficiency Optimization Method
Light-Load Efficiency Optimization Method

... Figs. 6(a)–(e) shows several dc–dc converter implementations of the proposed efficiency optimization method. The power stage box in the figures can be any single or interleaved powerconversion topology, such as half-bridge, full-bridge, singleor two-switch forward, or LLC topology. Fig. 6(a)–(c) sho ...
Advanced Setup for Thermal Cycling of Power Modules
Advanced Setup for Thermal Cycling of Power Modules

... allow the system to function at full load with only 3 phases, so redundancy can be easily built into Topology I by adding output ORing i.e. isolation diodes [27] after the inductor in each phase. Furthermore by adding extra phases, additional redundancy can be achieved. On the other hand Topology II ...
Influencing Factors of the Power Fluctuation on the Ultra High
Influencing Factors of the Power Fluctuation on the Ultra High

... Load is one of the most important components of power system. Its characteristics have important influence on security and stability features of the system [7]-[9]. Generally power system load is divided into 2 categories: static load and dynamic load. The static load mainly refers to load without r ...
Cables, conduits and trunking
Cables, conduits and trunking

... Hence, the voltage at the load is lower than the supply voltage by the amount of this volt drop. Volt drop may be calculated using the basic Ohm's law formula V = I x R Unfortunately, this simple formula is seldom of use in this case, because the cable resistance under load conditions is not easy to ...
BA22313321
BA22313321

FW3410821085
FW3410821085

... Space Vector PWM (SVPWM); Multi-carrier PWM. This paper focuses on space vector PWM techniques which have been extended for use in cascaded H-bridge multi-level inverter topologies. By using SVPWM method for cascaded H bridge multilevel inverter[9], output voltage signal can be optimized with respec ...
BDTIC TDA 7210
BDTIC TDA 7210

... ASK sensitivity typically -110dBm over specified temperature range ...
Extended Product Overview - AMETEK Programmable Power
Extended Product Overview - AMETEK Programmable Power

... spacecraft fixture identification and related mode capability, and more. Second, the PSTE is intended to negate the need for purchasing new power test equipment with each new spacecraft. With a review of current and future needs and industry trends, power resources can be sized to provide the optima ...
Pulse Width Modulation Based Adaptive Hysteresis
Pulse Width Modulation Based Adaptive Hysteresis

Anatomy of Switching Power Supplies
Anatomy of Switching Power Supplies

... (DC-DC converter is another nickname for switching mode power supplies). In this tutorial we will explain you how switching power supplies work and we will provide a journey into the PC power supply showing you its main components and what they do. We have already published a Power Supply Tutorial, ...
3ème conférence Internationale des énergies renouvelables CIER
3ème conférence Internationale des énergies renouvelables CIER

... reactive powers results [3][4]. Also, power converter is designed in partial scale, just about 30% of the generator rated power, which makes it attractive from economical point of view. The back to back AC-DC-AC voltage source converter has two main parts: grid side converter (GSC) that rectifies gr ...
< 1 ... 262 263 264 265 266 267 268 269 270 ... 576 >

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.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report