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oe1(光电查) - 科学论文

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  • A CMOS-Based Energy Harvesting Approach for Laterally Arrayed Multibandgap Concentrated Photovoltaic Systems

    摘要： This article presents an energy harvesting approach for a concentrated photovoltaic (CPV) system based on cell-block-level integrated CMOS converters. The CPV system, built upon the laterally arrayed multibandgap (LAMB) cell structure, is a potentially higher-efficiency and lower-cost alternative to traditional tandem-based systems. The individual cells within a sub-module block are connected for approximate voltage matching, and a multi-input single-output (MISO) buck converter harvests and combines the energy while performing maximum power point tracking (MPPT) locally for each cell type. A miniaturized MISO dc–dc prototype converter operating at 10 MHz is developed in a 130 nm CMOS process. For 45–160-mW power levels, the prototype converter achieves >92% nominal and >95% peak efficiency in a small (4.8 mm2) form factor designed to fit within available space in a LAMB PV cell block. The results demonstrate the potential of the LAMB CPV architecture for enhanced solar energy capture.

    关键词： concentrated photovoltaic (CPV) systems,CMOS dc–dc power converters,energy harvesting,multi-input single-output (MISO) dc–dc converter,maximum power point tracking (MPPT)

    更新于2025-09-23 15:21:01

  • [IEEE 2019 IEEE Energy Conversion Congress and Exposition (ECCE) - Baltimore, MD, USA (2019.9.29-2019.10.3)] 2019 IEEE Energy Conversion Congress and Exposition (ECCE) - A CMOS-Based Energy Harvesting Approach for Laterally-Arrayed Multi-Bandgap Concentrated Photovoltaic Systems

    摘要： This paper presents an energy harvesting approach for a concentrated photovoltaics (CPV) system based on cell-block-level integrated CMOS converters. The CPV system, built upon the Laterally-Arrayed Multi-Bandgap (LAMB) cell structure, is a potentially higher-efficiency and lower-cost alternative to traditional tandem-based systems. The cells within a sub-module block are connected for approximate voltage matching, and a CMOS-based multi-input single-output converter harvests and combines the energy while performing maximum power point tracking (MPPT) locally. First, a comparison of modeled performances achievable with traditional tandem CPV and LAMB CPV with a MISO converter is presented using day-long outdoor measured solar spectrum. The model predicts on average >19% more energy can be extracted from LAMB modules on a typical day. Then, a prototype miniaturized MISO dc-dc converter operating at 10MHz is developed in a 130nm CMOS process. For 45-160mW power levels, the prototype converter achieves >92% nominal and >95% peak efficiency in a small form factor designed to fit within available space in a LAMB PV cell block. The results demonstrate the potential of the LAMB CPV architecture for enhanced solar energy capture.

    关键词： energy harvesting,maximum power point tracking,concentrated photovoltaic systems,CMOS,MISO dc-dc converter,DC-DC power converters

    更新于2025-09-11 14:15:04