Paper Info
Title
Vibration Energy Scavenging System With Maximum Power Tracking for Micropower Applications
Abstract
In this work, we present a vibration-based energy scavenging system based on piezoelectric conversion for micropower applications. A novel maximum power point (MPP) tracking scheme is proposed to harvest the maximum power from the vibration system. A time-multiplexing mechanism is employed to perform energy harvesting and MPP tracking alternately. In the MPP tracking mode, a voltage reference that represents the optimal output voltage at the MPP is generated. A control unit then uses this reference to track the system operation around the MPP. The proposed system is capable of self-starting up without the help of an energy buffer. As a result, it is suitable for battery-less applications or when the energy buffer is completely drained. This tracking scheme has very small power overhead and is simple to implement in VLSI. Hence, it is especially applicable for micropower systems. The entire design was fabricated in a 0.35-μ m CMOS process. Experimental results verified the proposed MPP tracking scheme and demonstrated the system operation. Measurement results show that the power harvesting efficiency of the electrical circuitry is higher than 90%.
Year
DOI
Venue
2011
10.1109/TVLSI.2010.2069574
IEEE Transactions on Very Large Scale Integration (VLSI) Systems
Keywords
Field
DocType
cmos process,self-starting,cmos integrated circuits,piezoelectric conversion,system operation,mpp tracking mode,energy buffer,micropower application,micropower,maximum power tracking,vibrations,mppt,proposed mpp tracking scheme,maximum power point (mpp) tracking,battery-less application,micropower system,power harvesting efficiency,energy harvesting,vlsi,vibration energy harvesting,proposed system,maximum power point trackers,time-multiplexing mechanism,micropower applications,maximum power point tracking,piezoelectric devices,battery-less,tracking scheme,vibration energy scavenging system,mpp tracking alternately,vibration system,voltage reference,mathematical model,indexing terms,integrated circuit,capacitors,piezoelectric material,switches,energy scavenging
Micropower,Capacitor,Computer science,Voltage reference,Voltage,Energy harvesting,Electronic engineering,CMOS,Control unit,Maximum power principle,Electrical engineering
Journal
Volume
Issue
ISSN
19
11
1063-8210
Citations 
PageRank 
References 
14
1.46
6
Authors
3
Name
Order
Citations
PageRank
Chao Lu1418.60
Chi-ying Tsui21939314.94
Wing-Hung Ki31144197.75