MANUEL d’E´lectromagne´tisme Cours + Exercices Michel Henry Maıˆtre de confe´rences a` l’IUFM des Pays de Loire Agre´ge´ de physique

LINK ORIGINAL
http://livresgratuits.byethost3.com/livres/electromagnetisme.pdf

électricité générale Analyse et synthèse des circuits NEFFATI

LINK ORIGINAL
http://livresgratuits.byethost3.com/livres/Electricite%20generale.pdf

Últimas novidades em Painéis de Baixa Tensão é tema de evento promovido pela Eaton em São Paulo

PALESTRA NORMA IEC 61439 PARA CONJUNTOS DE MANOBRA E CONTROLE (PAINÉIS) DE BAIXA TENSÃO ASPECTOS COMPARATIVOS COM IEC 60439 ELIMINAÇÃO DOS CONCEITOS TTA/PTTA E OS NOVOS ROTEIROS PARA CERTIFICAÇÃO,MINISTRADA PELO ENG. LUIS FELIPE COSTA SENIOR SPECIALIST-PRODUCT APPLICATIONS POWER DISTRIBUTION-ASSEMBLIES-EATON CORPORATION-SÃO PAULO BRASIL-13 AGOSTO 2015.
 Nesta quinta-feira (13), a Eaton promoveu na capital paulista um evento com foco nas últimas novidades em Painéis de Baixa Tensão. A programação abordou aspectos da Norma IEC 61439, novos roteiros para certificação e o conceito moderno de CCM Inteligente. Teve o lançamento do novo Centro de Controle de Motores e Distribuição em BT – IEC, chamado de Power Xpert CXH. Data: 13 de agosto (quinta-feira) Horários: 8h30 Local: Hotel Estanplaza Funchal Faria Lima (Rua Funchal, 281 – Vila Olímpia - São Paulo SP-BRASIL)

SALUDOS AL PRIMER ENCUENTRO DE ROBOTICA 15 DE AGOSTO 2015 CHINCHA PERU

 CORDIALES SALUDOS AL PROFESOR DEMETRIO VEGA GARCIA Y AL CANAL19 DE CHINCHA PERU,ORGANIZADORES DEL PRIMER ENCUENTRO DE ROBOTICA EL 15 DE AGOSTO DE 2015,MUCHOS EXITOS.

Single-Stage Dimmable PFC DCM Flyback Converter without Electrolytic Capacitor for LED Lamps

The attention has been increased about energy problem caused by exhaustion of fossil fuel in the whole world. Under a situation like this, a light-emitting diode (LED) has been applied various industry field and general lighting because of its high efficiency, low power consumption, environment-friendly characteristic and long lifetime. The LED lighting is needed a ac to dc driver when it is applied in ac source because it use the constant current. Among the drivers, the most popular one is the switching converter. Generally, the electrolytic capacitor is used in the switching converter for constant output. However the lifetime of the electrolytic capacitor is shorter than the LED lighting. Therefore the lifetime of entire system is decreased. This paper presents the single-stage flyback converter without the electrolytic capacitor. Instead of the large capacitive electrolytic capacitor, the small capacitive film capacitor is used which has enough lifetime compared with the LED lightings. Because of decreasing the capacitive of capacitor, the large 120[Hz] ripple is shown on the output. To reduce the 120[Hz] ripple, LC resonant filter is applied. The two type of LC resonant filter, one is parallel type, and the other is serial type, is proposed. And the performances of two type of filter are compared and analyzed. Without additional circuit, the power factor is corrected with discontinuous conduction mode design. Also, a dimming control is available with only one switch using the analog dimming control. The proposed converter is verified through the simulation and the experimental works.