dc.contributor.author | Chew, ZJ | |
dc.contributor.author | Zhu, M | |
dc.date.accessioned | 2017-11-17T10:33:16Z | |
dc.date.issued | 2017-11-15 | |
dc.description.abstract | Maximum power transfer occurs in many energy harvesters at their half open-circuit voltage (VOC/2). A novel implementation method of maximum power point finding based on the VOC/2 method is presented by exploiting the capacitor charging voltage across a capacitor connected in parallel with the energy harvester. The presented technique has a specifically designed high-pass filter which has a peak output voltage that corresponds to the VOC/2 of the energy harvester. The control circuit filters and differentiates the voltage across the smoothing capacitor to directly determine the timing of reaching the VOC/2 of the energy harvester without having to find the VOC first, and is fully implemented using discrete analog components without the need of a microcontroller, leading to low power consumption of the method. In this paper, the control circuit is used in conjunction with a full wave diode bridge rectifier and a dc-dc converter to harvest energy from a piezoelectric energy harvester (PEH) as the studied case. The PEH was subjected to various strain levels at low frequencies from 2 to 10 Hz. Experimental results show that the implemented circuit is adaptive to various vibration amplitudes and frequencies and has a maximum power point finding efficiency of up to 98.28% with power consumption as low as 5.16 μW. | en_GB |
dc.description.sponsorship | Funding Agency: Engineering and Physical Sciences Research Council | en_GB |
dc.identifier.citation | Published online 15 November 2017 | en_GB |
dc.identifier.doi | 10.1109/TPEL.2017.2774102 | |
dc.identifier.uri | http://hdl.handle.net/10871/30348 | |
dc.language.iso | en | en_GB |
dc.publisher | Institute of Electrical and Electronics Engineers (IEEE) | en_GB |
dc.rights | © 2017 IEEE. Personal use is permitted, but republication/redistribution requires IEEE permission. See http://www.ieee.org/publications_standards/publications/rights/index.html for more information. | en_GB |
dc.subject | Capacitors | en_GB |
dc.subject | Power demand | en_GB |
dc.subject | Energy harvesting | en_GB |
dc.subject | Smoothing methods | en_GB |
dc.subject | Resistors | en_GB |
dc.subject | Timing | en_GB |
dc.subject | Voltage control | en_GB |
dc.subject | Adaptive control | en_GB |
dc.subject | Analog circuit | en_GB |
dc.subject | MPPT | en_GB |
dc.subject | Piezoelectric devices | en_GB |
dc.title | Adaptive Maximum Power Point Finding Using Direct VOC/2 Tracking Method with Microwatt Power Consumption for Energy Harvesting | en_GB |
dc.type | Article | en_GB |
dc.date.available | 2017-11-17T10:33:16Z | |
dc.identifier.issn | 0885-8993 | |
dc.description | This is the author accepted manuscript. The final version is available from IEEE via the DOI in this record. | en_GB |
dc.identifier.journal | IEEE Transactions on Power Electronics | en_GB |