Evaluation of a Low-Cost Permanent Emergency Lighting System Based on High-Efficiency LEDs

Manuel Rico-Secades, Member, IEEE, Antonio J. Calleja, Member, IEEE, Javier Ribas, Member, IEEE, Emilio L. Corominas, Member, IEEE, J. Marcos Alonso, Senior Member, IEEE, Jesús Cardesín, Member, IEEE, and Jorge García-García, Student Member, IEEE
Abstract
Nowadays, Permanent Emergency Lighting Systems (PELSs) are widely used in many applications, including emergency exit indication and lighting in critical or strategic points. Limitation in operation hours in classical lamps (10 000–20 000 h for fluorescent lamps) implies short lamp replacement times and, therefore, high maintenance costs. This paper shows an alternative solution based on high-efficiency LEDs. The long operation life (above 100 000 h) of high-efficiency LEDs with a very simple electronics circuitry implies an interesting solution for these types of applications. A 30-lm and 1-h PELS has been built and tested. A low-cost power supply has been built and used as a battery charger and LED driver.
LINK
https://www.mediafire.com/?x0oi808j3o4odv3

A Three-in-One Converter for Regular and Emergency Lighting Applications Yung-Chun Wu and Yu-Kai Chen,

 

A Three-in-One Converter for Regular and Emergency Lighting Applications Yung-Chun Wu and Yu-Kai Chen,
Abstract—This paper presents a three-in-one converter for regular and emergency lighting applications. The converter can function as regular ballast, emergency ballast, and battery charger/discharger, achieving regular and emergency lighting features. The three-in-one converter used in the ballast is an integration of a bidirectional flyback converter and two half-bridge series-resonant parallel-loaded inverters. The derivation and operating principle of the proposed converter are first presented, and an application to regular and emergency lighting is then developed. With the proposed converter and a single-chip microcontroller EM78P458, a low cost multifeature electronic ballast can be readily implemented and installed. Hardware measurements have verified its feasibility and the desired features.
LINK
https://www.mediafire.com/?4l8c0t2tx45c03q

Fundamentals of Electric Circuits Alexander Sadiku

NAVEGANDO EN LA INTERNET ENCONTRE ESTE BUEN LIBRO DE FUNDAMENTO DE CIRCUITOS ELECTRICOS DE ALEXANDER SADIKU SIN DUDA SERA LA ALEGRIA DE LOS ESTUDIANTES DE INGENIERIA ELECTRICA E INGENIERIA ELECTRONICA.

Power Electronics and Drives GATE NoteBook

Power Electronics and Drives GATE NoteBook
 It contains Mainly the flowing topics in the view of GATE Exam.1. Thyristors
2. Rectifiers
3. Choppers
4. Inverters
5. AC Voltage Controllers
6. Cycloconverters
7. Electrical Drives
8. Diode Circuits and Rectifiers
ORIGINAL WEBSITE
http://4eeestudents.blogspot.com.br/2013/02/power-electronics-and-drives-gate-note.html
DOWNLOAD
http://www.mediafire.com/view/?qrjm002lelyf024

INTRODUCTORY CIRCUIT ANALYSIS BOYLESTAD

ORIGINAL WEBSITE
http://bangla-uponnas.blogspot.com.br/search/label/ENGINEERING
LINK
http://www.mediafire.com/?2z2coxnbye57f3b