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Energies 2018, 11(10), 2702; https://doi.org/10.3390/en11102702

Bidirectional Interleaved PWM Converter with High Voltage-Conversion Ratio and Automatic Current Balancing Capability for Single-Cell Battery Power System in Small Scientific Satellites

College of Engineering, Ibaraki University, Hitachi 316-8511, Japan
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Received: 12 September 2018 / Revised: 1 October 2018 / Accepted: 4 October 2018 / Published: 11 October 2018
(This article belongs to the Section Energy Fundamentals and Conversion)
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Abstract

Single-cell battery power systems are a promising bus architecture for small scientific satellites. However, to bridge the huge voltage gap between a single-cell battery and power bus, bidirectional converters with a high voltage conversion ratio and a large current capability for the low-voltage side are necessary. This article proposes a bidirectional interleaved pulse width modulation (PWM) converter with a high voltage conversion ratio and an automatic current balancing capability. By adding capacitors to conventional interleaved PWM converters, not only are inductor currents automatically balanced without feedback control or current sensors, but also voltage conversion ratios at a given duty cycle can be enhanced. Furthermore, the added capacitors can reduce voltage stresses of switches and charged-discharged energies of inductors, realizing more efficient power conversion and reduced circuit volume in comparison with conventional converters. A 100-W prototype was built for experimental verification, and results demonstrated the fundamental characteristics and efficacy of the proposed converter. View Full-Text
Keywords: bidirectional converter; current balancing; interleaved converter; high voltage-conversion ratio; scientific satellite; single-cell battery bidirectional converter; current balancing; interleaved converter; high voltage-conversion ratio; scientific satellite; single-cell battery
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Uno, M.; Inoue, M.; Sato, Y.; Nagata, H. Bidirectional Interleaved PWM Converter with High Voltage-Conversion Ratio and Automatic Current Balancing Capability for Single-Cell Battery Power System in Small Scientific Satellites. Energies 2018, 11, 2702.

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