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

Masatoshi Uno, Masahiko Inoue, Yusuke Sato and Hikaru Nagata
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Masatoshi Uno: College of Engineering, Ibaraki University, Hitachi 316-8511, Japan
Masahiko Inoue: College of Engineering, Ibaraki University, Hitachi 316-8511, Japan
Yusuke Sato: College of Engineering, Ibaraki University, Hitachi 316-8511, Japan
Hikaru Nagata: College of Engineering, Ibaraki University, Hitachi 316-8511, Japan

Energies, 2018, vol. 11, issue 10, 1-12

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.

Keywords: bidirectional converter; current balancing; interleaved converter; high voltage-conversion ratio; scientific satellite; single-cell battery (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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