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Your search keyword '"Ejea J.B."' showing total 49 results
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49 results on '"Ejea J.B."'

1. Output Impedance Improvement Using Coupled Inductors

Author

Sanchis Kilders E., Ferreres A., Gasent Blesa J.L., Osorno D., Gilabert D., Maset E., Jordán J., Esteve V., and Ejea J.B.

Subjects
small signal analysis, output impedance, coupled inductors, peak current control, Environmental sciences, GE1-350
Abstract

When using a single DC/DC converter with multiple outputs and having a buck topology, which has one filter inductor per output, the designer can choose to couple these outputs together. This paper demonstrates additional benefits of coupling output inductors together. Apart from saving mass and volume, and due to an improved small signal behaviour it also reduces the output impedance of the regulated output. The paper will analyse a seven output push-pull converter used as a space power converter module and verify the theoretical results with experimental measurements.

Published
2017
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2. Benefits and Drawbacks of A High Frequency Gan Zvzcps Converter

Author

Blanes J. M., Garrigós A., Gutierrez R., Carrasco J. A., Maset E., Ejea J.B, Sanchis-Kilders E., Ferreres A., and Lizán J. L.

Subjects
Environmental sciences, GE1-350
Abstract

This paper presents the benefits and drawbacks of replacing the traditional Si Mosfets transistors with enhancement mode GaN transistors in a Half-Bridge Zero Voltage and Zero Current Switching Power Switching (ZVZCPS) converter. This type of converters is usually used as Electronic Power Converters (EPC) for telecommunication satellites travelling-wave tube amplifiers (TWTAs). In this study, firstly the converter is theoretically analysed, obtaining its operation, losses and efficiency equations. From these equations, optimizations maps based on the main system parameters are obtained. These optimization maps are the key to quantify the potential benefits of GaN transistors in this type of converters. Theoretical results show that using GaN transistors, the frequency of the converter can be pushed from 125kHz to 830kHz without sacrificing the converter efficiency. This frequency increase is directly related to reduction on the EPC size and weight.

Published
2017
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3. Optimized topology for high efficiency battery discharge regulator

Author

Ejea, J.B., Ferreres, A., Sanchis-Kilders, E., Maset, E., Esteve, V., Jordan, J., and Garrigos, A.

Subjects
Electric current regulators -- Research, Algebraic topology -- Usage, Topology -- Usage, Power regulator, Aerospace and defense industries, Business, Computers, Electronics, Electronics and electrical industries
Abstract

In the following years power levels of 20 kW to 50 kW will be demanded by the telecommunication satellites. It is not possible to keep 0.5 kW modules with up to 100 modules in parallel and, therefore, higher power modules must be used. A higher bus voltage seems also necessary and any voltage below 150 V and above 100 V could meet the needs. In addition, new optimized topologies that process only a part of the total power delivery can be employed to improve the efficiency. In this article, design guidelines and experimental results of a high efficiency battery discharge regulator (BDR) module based on parallel power processing are given.

Published
2008

5. Power system consumption model using SPICE

Author

Sanchis-Kilders, E., primary, Ferreres, A., additional, Gasent-Blesa, J.L., additional, Osorno, D., additional, Gilabert, D., additional, Maset, E., additional, Ejea, J.B., additional, Esteve, V., additional, and Jordan, J., additional

Published
2014
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