Op Amp Applications Handbook-Walt Jung, Editor with the technical staff of Analog Devices

LINK ORIGINAL EN LA WEB:
http://www.ee.mut.ac.th/home/suriya/ebooks/OpAmp%20Applications%20Handbook%20-%20Analog%20Devices.pdf

dq-based individual phase control of three-phase four-wire PWM rectifier for UPS -Kim,Seung Ho-Dept.of Electrical Engineering

dq-based individual phase control of three-phase four-wire PWM rectifier for UPS 

Kim,Seung Ho

Dept.of Electrical Engineering 

Graduate School of Industry and Engineering

Seoul National University of Science and Technology

ABSTRACT
Recently, the power quality sensitive loads such as computer and communications are so increased that the power supply with good power quality has come to the fore. However, it is possible that the public grid is interrupted by unexpected fault. Therefore, the UPS(uninterruptible power supply) has become an alternative solution to solve this problem. Generally, the UPS consist of a rectifier, a battery, and a PWM inverter and recently they use IGBT PWM rectifier to reduce input THDi and improve the input power factor.

 In this configurations the three-phase four-wire input UPS is widely used to eliminate the transformers in the UPS system. The aims of control algorithm for the IGBT PWM rectifier in three-phase four-wire UPS is a unity power factor. The SVM(space vector modulation) is one of the most popular and preferable PWM scheme because it reduces the commutation losses and harmonics in the output voltage, and has higher modulation index than SPWM(sinusoidal PWM) but they need a 3D SVM to control three-phase four-wire PWM rectifier and have some difficulties like as selection of inductance of input inductor and controls the neutral current.

 To improve this problem the another control algorithm which controls each phase individually has been suggested but this control algorithm use analog based control so ir's so sensitive and unstable. So another new algorithm which is added d-q control to control algorithm which controls each phase individually is suggested and it can control stably and can reduce neutral current too. This can be seen by computer simulation and experimental result.

LINK
https://copy.com/GC0dLofelGnJ3FcD

ESTUDO E APLICAÇÃO DE TÉCNICAS DE CONTROLE EMBARCADAS PARA ESTABILIZAÇÃO DE VÔO DE QUADRICÓPTEROS -Ana Sophia Cavalcanti Alves-Universidade Federal de Juiz de Fora Pos-Graduação em Engenharia Elétrica Doutorado em Sistema de Energia-BRASIL

Universidade Federal de Juiz de Fora
Pos-Graduação em Engenharia Elétrica
Doutorado em Sistema de Energia

ESTUDO E APLICAÇÃO DE TECNICAS DE CONTROLE
EMBARCADAS PARA ESTABILIZAÇÃO DE VÔO DE
QUADRICOPTEROS

ANA SOPHIA CAVALCANTI ALVES
Tese apresentada ao Programa de Pos- Graduação em Engenharia Elétrica, area de concentração: Sistemas de Energia, da Faculdade de Engenharia da Universidade Federal de Juiz de Fora como requisito parcial para obtenção do Titulo de Doutor.

LINK FULL THESIS:
http://www.ufjf.br/ppee/files/2013/03/Tese_Ana_Sophia.pdf

EZATEC FABRICANTE DE NOBREAKS NA FIEE SÃO PAULO 23-27 MARÇO 2015 BRASIL

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