Journal
INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS
Volume 39, Issue 3, Pages 241-256Publisher
WILEY
DOI: 10.1002/cta.631
Keywords
battery charger; low-power PV system; MPPT accuracy; conversion efficiency
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Funding
- Macroblock, Inc.
- National Science Council of Taiwan [NSC 96-2628-E-011-115-MY3]
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A battery charger with MPPT function for low-power PV system applications is presented in this study. For effective miniaturization, the battery charger is designed with high-frequency operation. Some current-sensing techniques are studied, and their MPPT implementation is compared. A battery charging method is also designed to prolong battery lifetime without the use of battery current sensors. The operation principles and design considerations of the proposed PV charger are analyzed and discussed in detail. A laboratory prototype is implemented and tested to verify the feasibility of the proposed scheme. Experimental results show that high MPPT accuracy and conversion efficiency can be simultaneously achieved under high-frequency operation. Copyright (C) 2010 John Wiley & Sons, Ltd.
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