Efficient Maximum Power Tracking of Energy Harvesting Using a μController for Power Savings

Heo, Sewan; Yang, Yil Suk; Lee, Jae Woo; Lee, Sang-kyun; Kim, Jong-Dae

doi:10.4218/etrij.11.0211.0149

Cited by 9 publications

(3 citation statements)

References 6 publications

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“…One solution is to use maximum power point tracking (MPPT) and impedance matching between the supply and the source. In this manner, the maximum power point (MPP) is the point that indicates the maximum output power [14]. Therefore, in an HEH system, the impedance matching of the harvester and the circuit must be observed to achieve higher efficiency.…”

Section: Introductionmentioning

confidence: 99%

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Thermally reused solar energy harvesting using current mirror cells

et al. 2023

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This paper implements a simultaneous solar and thermal energy harvesting system, as a hybrid energy harvesting (HEH) system, to convert ambient light into electrical energy through photovoltaic (PV) cells and heat absorbed in the body of PV cells. Indeed, a solar panel equipped with serially connected thermoelectric generators not only converts the incoming light into electricity but also takes advantage of heat emanating from the light. In a conventional HEH system, the diode block is used to provide the path for the input source with the highest value. In this scheme, at each time, only one source can be handled to generate its output, while other sources are blocked. To handle this challenge of combining resources in HEH systems, this paper proposes a method for collecting all incoming energies and conveying its summation to the load via the current mirror cells in an approach similar to the maximum power point tracking. This technique is implemented using off‐the‐shelf components. The measurement results show that the proposed method is a realistic approach for supplying electrical energy to wireless sensor nodes and low‐power electronics.

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Section: Introductionmentioning

confidence: 99%

“…In the second type, a multiplexer structure is used to switch between different EH sources [17,18]. In the third type, separate converters are used for each EH source [14]. Finally, in the fourth type, energy harvesters are connected in a series-parallel configuration [6].…”

Section: Introductionmentioning

confidence: 99%

Thermally reused solar energy harvesting using current mirror cells

et al. 2023

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“…In particular, various studies on thermoelectric energy harvesting using body heat have been applied in wearable devices for IoT systems. Most of all, a high efficiency and wide input dynamic range with maximum power point tracking (MPPT) [8]- [10] control are very important for devices to properly operate for a long periods of time despite the small power generated from thermoelectric generators (TEGs). In particular, widening the low range of the input voltage is an important issue because of the low temperature difference in body heat.…”

Section: Introductionmentioning

confidence: 99%

Transformer-Reuse Reconfigurable Synchronous Boost Converter with 20 mV MPPT-Input, 88% Efficiency and 37 mW Maximum Output Power

Im¹,

Moon²,

Lyuh³

2016

ETRI J

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This paper presents a transformer‐based reconfigurable synchronous boost converter. The lowest maximum power point tracking (MPPT)‐input voltage and peak efficiency of the proposed boost converter, 20 mV and 88%, respectively, were achieved using a reconfigurable synchronous structure, static power loss minimization design, and efficiency boost mode change (EBMC) method. The proposed reconfigurable synchronous structure for high efficiency enables both a transformer‐based self‐startup mode (TSM) and an inductor‐based MPPT mode (IMM) with a power PMOS switch instead of a diode. In addition, a static power loss minimization design, which was developed to reduce the leakage current of the native switch and quiescent current of the control blocks, enables a low input operation voltage. Furthermore, the proposed EBMC method is able to change the TSM into IMM with no additional time or energy loss. A prototype chip was implemented using a 0.18‐μm CMOS process, and operates within an input voltage range of 9 mV to 1 V, and an output voltage range of 1 V to 3.3 V, and provides a maximum output power of 37 mW.

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