A STUDY OF STEP-DOWN SWITCHNG MODE RECTIFIER AND APPLICATION OF SERIAL-PARALLEL BALANCE CHARGING FOR LI-ION BATTERY ARRAYS- LIN SHU HAN- TATUNG UNIVERSITY

A STUDY OF STEP-DOWN SWITCHNG MODE RECTIFIER AND APPLICATION OF SERIAL-PARALLEL BALANCE CHARGING FOR LI-ION BATTERY ARRAYS- LIN SHU HAN
THESIS FOR MASTER OF SCIENCE DEPARTMENT OF ELECTRICAL ENGINEERING TATUNG UNIVERSITY

LINK THESIS
https://copy.com/mgODBN3A7wCR6vWH

Improved transformer insulation assessment using dielectric response analysis PowerOn TTSC June 2014: Matz Ohlen, Megger

PowerOn TTSC June 2014: Brian Cheung, ABB Ltd

Avoiding Pitfalls in Coordination of Multi-Mode UPS and STS L Giuntini

 Session F1.04 - Avoiding pitfalls in coordination of multi-mode UPS and STS L Giuntini From: PEMD 2014, Session F1: Energy Conversion and Storage, 8 - 10 April 2014, Manchester 08 April 2014 Power channel

1.Introduction
 Uninterruptible Power Supplies (UPS) provide power conditioning and backup for mission critical applications, the typical example being the protection of Information Technology (IT) equipment in data centres installations. In this context, double-conversion is the preferred UPS topology [1], following the superior protection offered by the AC-DCAC conversion. However, the multiple conversion steps limit the efficiency of such topology. Therefore, some doubleconversion UPS have evolved towards Multi-mode operation, where efficiency is maximized by selecting the operating mode depending on the environmental conditions (namely, the power quality of the input mains). Performance of Multimode UPS and compatibility with the typical load requirements have been extensively discussed in [2, 3, 4]. At the same time, applications requiring the highest level of availability may improve their distribution reliability by means of redundancy. Particularly, multiple sources may be tied together by means of Static Transfer Switches (STS). These devices may switch between separate sources whenever the voltage of the active source is sensed as going out of given tolerances, just as in Multi-mode UPS. Therefore, the application of Multi-mode UPS operation and STS protection in the same installation poses significant challenges. This paper addresses the coordination of Multimode UPS and downstream STS by highlighting common pitfalls to be avoided,
2 Multi-mode UPS
Figure 1 depicts a basic block diagram for a doubleconversion
transformer-based UPS

GE Consumer & Industrial SA, Via Cantonale 50,CH-6595 Riazzino, Switzerland, lorenzo.giuntini@ge.com
LINK VIDEO
http://scpro.streamuk.com/uk/player/Default.aspx?wid=19227&ptid=1066&t=0

Electromagnetismo para Ingeniería Electrónica CAMPOS Y ONDAS- ALEJANDRO PAZ PARRA

LINK
http://issuu.com/selloeditorial/docs/libro_campos_y_ondas/1

Modelagem da Dinâmica de Sistemas e Estudo da Resposta

Modelagem da Dinâmica de Sistemas e Estudo da Resposta - Segunda Edição Esta obra atende a cursos de graduação e cursos iniciais de pós-graduação cujos respectivos programas contemplem modelagem da Dinâmica de Sistemas. A técnica de modelagem aqui ensinada utiliza metodologia especial que se resume na divisão das expressões matemáticas em dois grupos: equações e relações. Foi acrescentado ainda o estudo da resposta, assunto indispensável para compreender o comportamento dinâmico de sistemas, necessário na elaboração de projetos, análise e avaliação de sistemas. Os assuntos foram cuidadosamente selecionados e didaticamente desenvolvidos, com base na experiência de muitos anos de ensino de modelagem.
LINK ORIGINAL
http://issuu.com/rimaeditora/docs/modelagem_segedicao_parte_1/1

COMSOL WEBINAR Title: Tech Insider: Transformer and Inductor Modeling with COMSOL Multiphysics February 12, 2015 Time: 02:00 PM Eastern Standard Time

Summary

Thursday, February 12, 2015 • 2:00 PM Eastern Standard Time 

To minimize transmission losses, electrical grids transport power over distances at low currents and high voltages. Improving the performance and reliability of transformers, which are vital to minimizing these losses, has great potential value. Multiphysics simulation enables accurate transformer and inductor design by accounting for coupled electrical and thermal effects, such as Joule heating. This webinar will introduce techniques for modeling inductive couplings and will demonstrate the simulation of a transformer in COMSOL Multiphysics. The presentation will also include a Q&A session.

REGISTER NOW

LINK

https://event.on24.com/eventRegistration/EventLobbyServlet?target=reg20.jsp&eventid=926237&sessionid=1&key=87B543A9397B3D6FDDDD170CB03BD646&partnerref=sponsor&=register

HANDS -ON ELECTRONICS

LINK
https://www.scribd.com/doc/20344493/Hands-on-Electronics

Power Syst Electromagnetic

LINK
https://www.scribd.com/doc/46527079/Power-Syst-Electromagn

Power Syst Electromagn

ABB Transformer Handbook

LINK
https://www.scribd.com/doc/185672208/ABB-Transformer-Handbook-Business-Unit-Transformers-Power-Technologies-Division