TY - JOUR
T1 - Maximum Energy Efficiency Tracking Circuits for Converter-Less Energy Harvesting Sensor Nodes
AU - Sun, Y.
AU - Yuan, Zhe
AU - Liu, Yongpan
AU - Li, X.
AU - Wang, Y.
AU - Wei, Q.
AU - Wang, Yiqun
AU - Narayanan, V.
AU - Yang, H.
N1 - Publisher Copyright:
© 2004-2012 IEEE.
PY - 2017/6
Y1 - 2017/6
N2 - Converter-less supply architecture is promising for energy harvesting sensor nodes, due to their high conversion efficiency, low cost, and easy integration. However, lack of a DC-DC converter precludes the electronic load operating under the voltage for optimal energy efficiency, since the output voltage of the energy harvester is set as the maximum power point tracking (MPPT) voltage. To mitigate efficiency loss of workload, we propose an architecture to achieve maximum energy efficiency tracking for the overall sensor node. A theoretical analysis is given for the architecture and an efficiency-driven frequency controller is fabricated to validate the design methodology. Measured results demonstrate that up to 162% performance gain of the overall sensor node is achieved compared with the existing systems with MPPT.
AB - Converter-less supply architecture is promising for energy harvesting sensor nodes, due to their high conversion efficiency, low cost, and easy integration. However, lack of a DC-DC converter precludes the electronic load operating under the voltage for optimal energy efficiency, since the output voltage of the energy harvester is set as the maximum power point tracking (MPPT) voltage. To mitigate efficiency loss of workload, we propose an architecture to achieve maximum energy efficiency tracking for the overall sensor node. A theoretical analysis is given for the architecture and an efficiency-driven frequency controller is fabricated to validate the design methodology. Measured results demonstrate that up to 162% performance gain of the overall sensor node is achieved compared with the existing systems with MPPT.
UR - http://www.scopus.com/inward/record.url?scp=85020282483&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85020282483&partnerID=8YFLogxK
U2 - 10.1109/TCSII.2016.2623354
DO - 10.1109/TCSII.2016.2623354
M3 - Article
AN - SCOPUS:85020282483
SN - 1549-7747
VL - 64
SP - 670
EP - 674
JO - IEEE Transactions on Circuits and Systems II: Express Briefs
JF - IEEE Transactions on Circuits and Systems II: Express Briefs
IS - 6
M1 - 7725972
ER -