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Open AccessFeature PaperArticle

Power Supply Switch Circuit for Intermittent Energy Harvesting

1
Department of Mechanical Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA
2
Department of Mechanical Engineering, University of Maryland Baltimore County, Baltimore, MD 21250, USA
*
Author to whom correspondence should be addressed.
Electronics 2019, 8(12), 1446; https://doi.org/10.3390/electronics8121446
Received: 31 October 2019 / Revised: 21 November 2019 / Accepted: 23 November 2019 / Published: 1 December 2019
(This article belongs to the Special Issue Energy Harvesting and Storage Applications)
Energy harvesters generate power only when ambient energy is available, and power loss is significant when the harvester does not produce energy and its power management circuit is still turned on. This paper proposes a new high-efficiency power management circuit for intermittent vibration energy harvesting. The proposed circuit is unique in terms of autonomous power supply switch between harvester and storage device (battery), as well as self-start and control of the operation mode (between active and sleep modes). The self-start controller saves power during an inactive period and the impedance matching concept enables maximum power transfer to the storage device. The proposed circuit is prototyped and tested with an intermittent vibration energy harvester. Test results found that the daily energy consumption of the proposed circuit is smaller than that of the resistive matching circuit: 0.75 J less in sleep mode and 0.04 J less in active mode with self-start.
Keywords: low power management circuit; piezoelectric energy harvester; wind turbine blade; health monitoring; wireless sensor low power management circuit; piezoelectric energy harvester; wind turbine blade; health monitoring; wireless sensor
MDPI and ACS Style

Jung, H.J.; Nezami, S.; Lee, S. Power Supply Switch Circuit for Intermittent Energy Harvesting. Electronics 2019, 8, 1446.

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