Abstract
ABSTRACTThis study discloses the diode’s influences on the piezoelectric energy harvesting performance. The piezoelectric-based energy harvesting system plays an important role in scavenging environment vibration energy into electrical energy, which can be utilized by low-power electronic devices. With respect to the interface circuit, a full-wave bridge circuit is usually needed to rectify the alternating current (AC) signal into a direct current (DC) signal. The full-wave bridge is composed of four diodes, whose characteristics may influence the harvested power significantly. Therefore, in this paper, the diodes’ properties and influences on the energy harvesting performance are analyzed and presented via simulation and experimental studies. It is found the harvested energy has close relationship with the diode characteristics. For the high source impedance case, diode with low reverse leakage current is favorable. For the low source impedance case, diode with low forward voltage drop is favorable. The corresponding experimental study is carried out via a piezoelectric beam, which shows that the measured harvested power differences can almost be up to 800% for the same test structure.
Highlights
The piezoelectric-based energy harvesting system generally includes two parts, the mechanical design part and the interface circuit part
The voltage on the resistor can be obtained via the virtual Agilent 34401A Multimeter and the reverse leakage current value is calculated according to Equation (3)
The classical full-wave bridge composed of different diodes is used as the energy harvesting interface circuit, and the diode’s influence on piezoelectric energy harvester’s performance is presented via both simulation and experimental approaches
Summary
The piezoelectric-based energy harvesting system generally includes two parts, the mechanical design part and the interface circuit part. The purpose of the interface circuit is to rectify and condition the output voltage, and store and manage the electrical energy [5]. It should be noted that the full-wave bridge remains as an essential part of many advanced interface circuits, such as synchronized switch harvesting on inductor (SSHI) [6], synchronous electrical charge extraction (SECE) [7], and enhanced synchronized switching harvesting (ESSH) [8] types. When the full-wave bridge circuit begins to work, the generated voltage needs to overcome the diode’s barrier potential before it reaches the output terminals. The energy harvesting performances are compared via a realistic piezoelectric energy harvester and the optimum diode for the maximum energy harvesting performance is determined
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
