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Models of disturbances in power networks for testing frequency
Models of disturbances in power networks for testing frequency

High Performance Resonant Mode Controller
High Performance Resonant Mode Controller

IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE) ISSN: 2278-1676
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE) ISSN: 2278-1676

AS32300306
AS32300306

... (DSTATCOM) is very important while compensating rapidly unbalanced and nonlinear loads. Any change in the load affects the dc-link voltage directly .The sudden removal of load would result in an increase in the dc-link voltage above the reference value, where as sudden increase in load would reduce ...
UCC2813-0-Q1 数据资料 dataSheet 下载
UCC2813-0-Q1 数据资料 dataSheet 下载

This article will discuss a very basic subject, simple power supply
This article will discuss a very basic subject, simple power supply

... be dissipated as heat. Switching regulators make use of energy storage components (L and C) and generally have better efficiency than linear regulators, often 65 to 90 percent or better. In addition, the elimination of heavy, expensive, and large 60 Hz transformers will reduce cost size and weight. ...
AP6508  500kHz 21V 3A SYNCHRONOUS DC/DC BUCK CONVERTER Description
AP6508 500kHz 21V 3A SYNCHRONOUS DC/DC BUCK CONVERTER Description

... efficiency and output voltage accuracy. For high values of R1 there is less current consumption in the feedback network. However the trade off is output voltage accuracy due to the bias current in the error amplifier. R2 can be determined by the following equation: ...
XCL211/XCL212Series
XCL211/XCL212Series

... full range of loads, from light to heavy, enabling the extension of battery operation time. The series have a high speed soft-start as fast as 1ms in typical for quick turn-on. With the built-in UVLO (Under Voltage Lock Out) function, the internal P-channel driver transistor is forced OFF when input ...
- Eddystone User Group
- Eddystone User Group

... In our last lssue I explained the philosophy behind this mini-series. How, in the past ten years, since I've been active with E.U.G., I've met members who could recite Ladner & Stoner backwards and others who'd never heard of A.G.C. As an entirely self-trained "technician", whose only "qualification ...
Direct Drive Lead Acid Battery Desulfator (Type−3 "Jackhammer")
Direct Drive Lead Acid Battery Desulfator (Type−3 "Jackhammer")

Principles of Electronic Communication Systems
Principles of Electronic Communication Systems

...  Class B amplifiers are biased at cutoff so that no collector current flows with zero input. Only one-half of the sine wave is amplified.  Class AB linear amplifiers are biased near cutoff with some continuous current flow. They are used primarily in push-pull amplifiers and provide better lineari ...
MAX5932EVKIT
MAX5932EVKIT

Evaluation Board User Guide
Evaluation Board User Guide

... Evaluation boards are only intended for device evaluation and not for production purposes. Evaluation boards are supplied “as is” and without warranties of any kind, express, implied, or statutory including, but not limited to, any implied warranty of merchantability or fitness for a particular purp ...
UC2874-2 数据资料 dataSheet 下载
UC2874-2 数据资料 dataSheet 下载

... voltage down to a tightly regulated output voltage. Special design techniques allow this bipolar IC to deliver exceptional performance while consuming approximately 6mA of supply current over an input voltage range of 4.5 to 35 volts. Fixed frequency operation allows synchronization to an existing s ...
LV8806QA - ON Semiconductor
LV8806QA - ON Semiconductor

... The power supply stabilizer capacitor needs to be 4.7µA or higher. Connect VCC and GND as wide and short as possible. If the supply voltage increases due to the kickback of coil as a result of using reverse connection protector diode, make sure to connect Zener diode between the power supply and GND ...
ACM - JNEC
ACM - JNEC

Chapter 3 Electricity
Chapter 3 Electricity

... Electric current (represented by the letter “I”) is the flow of electrons. Current is measured in amperes (A) with an ammeter. Amperes are abbreviated as “amps”. Current is always measures as the flow through something (e.g., wire, electronic component, etc). Voltage (represented by the letter “E”) ...
13 DelcoXSVolt
13 DelcoXSVolt

Introduction to (SMAW) Shielded Metal Arc Welding
Introduction to (SMAW) Shielded Metal Arc Welding

ADE7752B 数据手册DataSheet 下载
ADE7752B 数据手册DataSheet 下载

Paper - Indico
Paper - Indico

... There are many topologies that can be used to form a Pulse Forming Network (PFN). However a PFN with mutual coupling, which is called the Guillemin type E network, is used to improve the pulse characteristic. In Guillemin type E network, the value of capacitance and inductance are same in each secti ...
The capacitive divider in medium-voltage switchgear
The capacitive divider in medium-voltage switchgear

... transformers is impossible. In power distribution, current and voltage values are among the most important measured values. Above a certain level, the voltage can no longer be measured directly, but must first be reduced to a lower value using suitable devices – converters. In medium-voltage switchg ...
PQ_Unit II
PQ_Unit II

Capacitance
Capacitance

Document
Document

... There are two major classifications of ac motors. 1. Induction motor 2. Synchronous motor. 3. Both types use a rotating field in the stator windings. Induction motors work because current is induced in the rotor by the changing current in the stator. This current creates a magnetic field that reacts ...
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Spark-gap transmitter



A spark-gap transmitter is a device that generates radio frequency electromagnetic waves using a spark gap.Spark gap transmitters were the first devices to demonstrate practical radio transmission, and were the standard technology for the first three decades of radio (1887–1916). Later, more efficient transmitters were developed based on rotary machines like the high-speed Alexanderson alternators and the static Poulsen Arc generators.Most operators, however, still preferred spark transmitters because of their uncomplicated design and because the carrier stopped when the telegraph key was released, which let the operator ""listen through"" for a reply. With other types of transmitter, the carrier could not be controlled so easily, and they required elaborate measures to modulate the carrier and to prevent transmitter leakage from de-sensitizing the receiver. After WWI, greatly improved transmitters based on vacuum tubes became available, which overcame these problems, and by the late 1920s the only spark transmitters still in regular operation were ""legacy"" installations on naval vessels. Even when vacuum tube based transmitters had been installed, many vessels retained their crude but reliable spark transmitters as an emergency backup. However, by 1940, the technology was no longer used for communication. Use of the spark-gap transmitter led to many radio operators being nicknamed ""Sparks"" long after they ceased using spark transmitters. Even today, the German verb funken, literally, ""to spark,"" also means ""to send a radio message or signal.""
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