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”

domingo, 28 de março de 2021

Development of 3kW Hybrid ESS with Function of Emergency Power Supply-Authors 양석현(Seok-Hyun Yang) ; 김민재(Min-Jae Kim) ; 최세완(Se-Wan Choi) ; 조준석(Jun-Seok Cho)












Abstract
Development of 3kW Hybrid ESS with Function of Emergency Power Supply Authors 양석현(Seok-Hyun Yang) ; 김민재(Min-Jae Kim) ; 최세완(Se-Wan Choi) ; 조준석(Jun-Seok Cho

 This paper proposes a high-efficiency 3-kW hybrid ESS with emergency power supply. The proposed system enables efficient use of power from photovoltaic (PV) cells and energy storage system (ESS). The proposed system can operate as an uninterruptible power supply (UPS) when grid fault occurs, providing seamless transfer from grid-connected mode to stand-alone mode. The LLC converter for PV achieves ZVS turn-on of switches and ZCS turn-off of diodes, and the isolated bidirectional DC-DC converter for ESS achieves ZCS turn-off regardless of load condition, resulting in high efficiency. The efficiency and performance of the proposed hybrid ESS has been verified by a 3-kW prototype.

sábado, 20 de março de 2021

Transient Calorimetric Measurement of Ferrite Core Losses Papamanolis, P.; Guillod, T.; Krismer, F.; Kolar, J. W.-Proceedings of the 35th IEEE Applied Power Electronics Conference and Exposition (APEC 2020)


 LINK VIDEO: https://video.ethz.ch/play/presentations_2020/a0300b98-7210-4181-a5b2-2bd6fa4eaaf2.html

Transient Calorimetric Measurement of Ferrite Core Losses Papamanolis, P.; Guillod, T.; Krismer, F.; Kolar, J. W. 21.03.2020 Proceedings of the 35th IEEE Applied Power Electronics Conference and Exposition (APEC 2020)

 Abstract—An accurate and fast transient calorimetric ferrite core-loss measurement method is proposed in this paper. In contrast to electrical measurements, the accuracy of the calorimetric approach is independent of the magnetic excitation and operating frequency. However, an accurate value of the thermal capacitance of the Core Under Test (CUT) is required, which can be achieved, e.g., by measuring the specific heat capacity of the measured core material using a Differential Scanning Calorimeter (DSC) or by using the CUT as a DC electric conductor and measuring its thermal response for known Joule heating. The proposed method is tested experimentally and compared successfully to a state-ofthe- art electrical loss measurement method on MnZn ferrite cores.

domingo, 7 de março de 2021

INVESTIGATION OF BRIDGELESS SINGLE-PHASE SOLUTIONS FOR AC-DC POWER FACTOR CORRECTED CONVERTERS by Muntasir Ul Alam. -THE UNIVERSITY OF BRITISH COLUMBIA


 INVESTIGATION OF BRIDGELESS SINGLE-PHASE SOLUTIONS FOR AC-DC POWER FACTOR CORRECTED CONVERTERS
 by Md. Muntasir Ul Alam M.E.Sc., Western University, 2010 B.Sc., Islamic University of Technology, 2006
 A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF DOCTOR OF PHILOSOPHY in The College of Graduate Studies (Electrical Engineering) 
THE UNIVERSITY OF BRITISH COLUMBIA (Okanagan) July 2017