AUTOR DO BLOG ENG.ARMANDO CAVERO MIRANDA SÃO PAULO BRASIL

"OBRIGADO DEUS PELA VIDA,PELA MINHA FAMILIA,PELO TRABALHO,PELO PÃO DE CADA DIA,PROTEGENOS DO MAL"

"OBRIGADO DEUS PELA VIDA,PELA MINHA FAMILIA,PELO TRABALHO,PELO PÃO DE CADA DIA,PROTEGENOS  DO MAL"

“SE SEUS PROJETOS FOREM PARA UM ANO,SEMEIE O GRÂO.SE FOREM PARA DEZ ANOS,PLANTE UMA ÁRVORE.SE FOREM PARA CEM ANOS,EDUQUE O POVO.”

“Sixty years ago I knew everything; now I know nothing; education is a progressive discovery of our own ignorance. Will Durant”

sexta-feira, 14 de agosto de 2015

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)

quarta-feira, 12 de agosto de 2015

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.

terça-feira, 11 de agosto de 2015

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.

sexta-feira, 7 de agosto de 2015

LIBROS PERUANOS PARA EL MUNDO 1


SALUDOS DESDE SÃO PAULO DISTINGUIDO AMIGO PROFESOR WALTER PEREZ TERREL,QUE CONTINUEN CON TU GRAN LABOR DOCENTE DE DIFUNDIR LA FISICA CON TUS INEDITOS METODOS DIDACTICOS DE TEORIA Y LABORATORIO,COMO INGENIERO ELECTRONICO TENGO QUE HACER ENFASIS QUE LA FISICA SE APRENDE MUCHO MAS CON EXPERIMENTOS DE LABORATORIO Y CON INVESTIGACIÓN Y DESARROLLO,MUCHOS EXITOS A VOCE Y TODODS LOS ESTUDIANTES PERUANOS.

Análise da fonte TV LED Samsung UN32D5000

segunda-feira, 3 de agosto de 2015

The integrated operation and design of the DC distribution systems combined wind turbine and photovoltaic power systems Shin,Soo Cheol Department of Electrical and Computer Engineering Sungkyunkwan University








( Abstract )
 Because DC distribution system has more numerous advantages than AC distribution system, aircraft and ships have been applied to the DC distribution system. because consumer and office equipment consisting of the electronic systems use DC power, the power can be easily supplied to the load using simple power conversion system. especially, high efficiency power transmission is possible because the power conversion step supplying the power to the electronic load is small in DC distribution system. however, due to the power grid of land consisting of AC power grid, most of the land power system are applied to the AC distribution system except for special cases such as IDC(Internet Data Center) and etc. In this paper, design and control method of DC distribution system which can be connected with AC distribution system of land is proposed. In addition, it proved that the connection of renewable energy can be more easily connected with DC distribution system than AC distribution system by connecting DC distribution grid with renewable energy such as wind power of PMSG type and photovoltaic system through the simulation and experiment. Three-phase AC/DC PWM converter can supply DC 380[V] to the DC bus in case that AC power distribution voltage is AC 220[V]. however, because the secondary side of the transformer consists of Y connection and 380[V] in most of the commercial building, in order to configure a DC distribution system, it is boosted to DC 700[V] using three-phase AC/DC PWM converter. And then, the DC distribution system of DC 380[V] was constructed using non-isolated bidirectional DC/DC converter. In this paper, considering the stable operation of DC distribution system, three control algorithm and a topology of DC distribution system were proposed. And a thermal model was proposed to simulate the heat of the semiconductor in PSIM software. Also, it proved that generated power can be easily connected to DC distribution grid by connecting DC distribution system with renewable distributed generation systems such as wind power and photovoltaic system. First, parallel control method is proposed for 50[kW] voltage source DC/DC power converter. Traditionally, parallel operation of two converters has been used to method which commonly combined voltage source converter with current source converter. The reason is that voltage source power converter has very small impedance to the output capacitor. Therefore, excessive inrush current occur and it cause destruction on the power converters when two voltage source converters are connected each other. Also, traditionally parallel operation method of combining voltage source converter with current source converter has disadvantages of a stop for whole systems when voltage source converter has broken. The reason is that voltage source converter is only possible to control the voltage of DC bus. Also, voltage and current source converter have to be designed respectively to operate parallel systems. In order to solve this problem, this paper proposed control algorithm that can connect two voltage source converters in parallel. Hardware parameters of two voltage source converter are equally designed and it is separated to main system and slave system in control aspects. The main system control the voltage of DC bus and slave system performs power control to share loads of the main system. Because the hardware is equal, slave system is able to perform the role of the main controller when the main system is broken. Therefore, the proposed method has advantage of improved reliability. Second, in DC distribution system, bidirectional DC/DC converter is unnecessary in case that AC input voltage is 220[Vrms]. The reason is that three-phase AC/DC PWM converter is available to supply 380[V] to DC link. Therefore, this paper proposed a novel multi-parallel control algorithm of voltage source three-phase AC/DC PWM converter having the same structure in DC distribution system with three-phase AC/DC PWM converter only.
FULL THESIS:
https://copy.com/kZbi0viAordBS0ci