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”

sábado, 17 de julho de 2021

Rocket and space technology. Spacecraft launch vehicles V.N.Kobelev , A.G. Milovanov-Ракетно-космическая техника. Средства выведения космических аппаратов В.Н.Кобелев, А.Г.Милованов










Rocket and space technology. Spacecraft launch vehicles V.N.Kobelev , A.G. Milovanov 

 At the Baikonur cosmodrome, a monument has been erected with the historical words: “Here the genius of the Soviet man began a daring assault on space / 1957 /”. More than half a century has passed since the first artificial Earth satellite was launched into space. Ensuring guaranteed access to space is one of the important tasks of space activities. If at the dawn of cosmonautics only the USSR and the USA had their own launch vehicles, then in the subsequent period the club of space powers was constantly expanding. And currently, there is fierce competition in the spacecraft launch vehicle market. The launch vehicles themselves are constantly being improved. This book has been prepared by well-known Russian scientists in the field of the development of spacecraft launch vehicles - Professor V. N. Kobelev and Professor A. G. Milovanov. In it, on the example of a large number of samples of launch vehicles, an analysis of their development and constructive improvement is carried out. The book contains a large reference material on the design and characteristics of domestic and foreign models of launch vehicles, is well illustrated. Much attention in the book is paid to reusable rocket and aerospace systems. This book will be useful for students.

 Ракетно-космическая техника. Средства выведения космических аппаратов В.Н.Кобелев, А.Г.Милованов 

 На космодроме Байконур установлен монумент с историческими словами: «Здесь гением советского человека начался дерзновенный штурм космоса /1957 г./». Прошло более полувека с тех пор, как в космос был запущен первый искусственный спутник Земли. Обеспечение гарантированного доступа в космос является одной из важных задач космической деятельности. Если на заре космонавтики только СССР и США обладали собственными средствами выведения, то в последующий период клуб космических держав постоянно расширялся. И в настоящее время на рынке средств выведения космических аппаратов наблюдается жесткая конкуренция. Сами средства выведения постоянно совершенствуются. Настоящая книга подготовлена известными российскими учеными в области разработки средств выведения космических аппаратов — профессором В. Н. Кобелевым и профессором А.Г.Миловановым. В ней на примере большого числа образцов средств выведения проведен анализ их развития и конструктивного совершенствования. Книга содержит большой справочный материал по устройству и характеристикам отечественных и зарубежных образцов средств

DOWNLOAD FILE FORMAT DJVU:  https://br1lib.org/book/2763878/b67e3e

sexta-feira, 16 de julho de 2021

Космическая техника и технологии - Space engineering and technolog-КОСМИЧЕСКАЯ ТЕХНИКА И ТЕХНОЛОГИИ № 2(17)/2017








 INTERNATIONAL COOPERATION IN THE SPHERE OF MANNED FLIGHTS. PART 2. DEVELOPMENT AND OPERATION OF THE INTERNATIONAL SPCE STATION

 Derechin a.g., Zharova l.N., Sinyavskiy v.v., Solntsev v.l., Sorokin I.v.
S.P. Korolev Rocket and Space Public Corporation Energia (RSC Energia)
4A Lenin str., Korolev, Moscow reg., 141070, Russian Federation, e-mail: post@rsce.ru

 Problems of the international cooperation during development and operation of the Russian Segment (RS) of the International Space Station (ISS) are discussed. Consideration is given to the history of the project and the structure of the joint management bodies. The solution of international legal matters including property and resource allocation issues in the context of the difficulties in financing the national manned space program in the nineties and in the early 2000s is addressed. The progress of the program implementation is described, it is noted that Russia fulills all international obligations incurred. The role of RSC Energia in providing delivery of the crews and cargoes to the ISS upon termination of the U.S. Space Shuttle lights is emphasized. The results of cooperation and the examples of mutual assistance of the partners, difficulties of generating segments and agreements on extension of the ISS operation are shown. Science programs fulfilled jointly with foreign colleagues are summarized. Key words: manned cosmonautics, international cooperation, the International Space Station, the ISS, the Russian Segment, scientific experiments, international legal matters, financing of the ISS program. Ракетно-космическая корпорация «Энергия» имени С.П. Королёва (РКК «Энергия») Ул. Ленина, 4А, г. Королёв, Московская обл., Российская Федерация, 141070, e-mail: post@rsce.ru S.P. Korolev Rocket and Space Public Corporation Energia (RSC Energia) 4A Lenin str., Korolev, Moscow reg., 141070, Russian Federation, e-mail: post@rsce.ru.

sexta-feira, 9 de julho de 2021

Design and Implementation of a High-Efficiency On- Board Battery Charger for Electric Vehicles with Frequency Control Strategy-Jong-Soo Kim, Gyu-Yeong Choe, Hye-Man Jung, Byoung-Kuk Lee--Young-Jin Cho, Kyu-Bum Han-


 Design and Implementation of a High-Efficiency On- Board Battery Charger for Electric Vehicles with Frequency Control Strategy

 Jong-Soo Kim, Gyu-Yeong Choe, Hye-Man Jung, Byoung-Kuk Lee Information and Communication Engineering SungKyunKwan University Suwon, Korea sniper75@skku.edu, lovesagaji@skku.edu, jungicarus@skku.edu, bkleeskku@skku.edu 
Young-Jin Cho, Kyu-Bum Han EVT Group, R&D Center Samsung Electro-Mechanics Suwon, Korea yj1996.cho@samsung.com

Abstract— This paper presents a design and implementation of 3.3 kW on-board battery charger for electric vehicles or plug-in hybrid electric vehicles. A series-loaded resonant dc-dc converter and frequency control are adopted in consideration of efficiency, reliability, volume, cost, and so on. In order to obtain high efficiency and less volume within 6 liters, a prototype of the charger is designed and implemented by using high frequency of 80-130kHz and zero voltage switching method. The experimental result indicates 93% of the maximum efficiency and 5.84 liters in volume of the developed 3.3 kW on-board battery charger.

SPREADSHEET Current fed push pull converter topology -Planilha de Cálculo Conversor Push-Pull em Corrente da familia Boost















 LINK FILE PDF: https://www.mediafire.com/file/f2axmxgvoqk042z/Mathcad+-+push-pull-BBBB.pdf/file