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
Assinar:
Postagens (Atom)