Low-cost energy management circuit base on primary feedback self-oscillating flyback converter for piezoelectric energy harvesting

Over the past few years, using piezoelectric elements to harvest energy from ambient vibrations has been of great interest. However, there are significant challenges in converting the power generated from the piezoelectric elements to usable form. This paper discusses the design and fabrication of off-line power supply based on a self-oscillating flyback converter. An energy management circuit was upgraded for employing in the low power generators as piezo buzzer. Since the cost per unit of the existent energy management circuit is more expensive. Therefore, this research is also to concentrate on the design of a low-cost energy management circuit that the cost is lowers than 1 USD. The primary feedback self-oscillating flyback converter was considered due to its simplicity and low component count. In addition, this circuit also operates as buck-boost converter which is more appropriate for integrating to low power generator with unsteady and low output voltage. For the experimental setup, the circuit was defined to work with 2.5-5 V input voltage. It is able to achieve the good output voltage regulation 5 V +/-6% at the 10 mA maximum current consumption of load.

[1]  Adnan Harb,et al.  Energy harvesting: State-of-the-art , 2011 .

[2]  Paul K. Wright,et al.  A STUDY OF AMBIENT VIBRATIONS FOR PIEZOELECTRIC ENERGY CONVERSION , 2009 .

[3]  Neil M. White,et al.  An electromagnetic, vibration-powered generator for intelligent sensor systems , 2004 .

[4]  Paul K. Wright,et al.  A piezoelectric vibration based generator for wireless electronics , 2004 .

[5]  S. Choe,et al.  Analysis of Piezoelectric Materials for Energy Harvesting Devices under High-g Vibrations , 2007 .

[6]  Saibal Roy,et al.  A micro electromagnetic generator for vibration energy harvesting , 2007 .

[7]  Henry A. Sodano,et al.  A review of power harvesting using piezoelectric materials (2003–2006) , 2007 .

[8]  C. Van Hoof,et al.  Micropower energy harvesting , 2009, ESSDERC 2009.

[9]  T. Suntio.  Average and small-signal modeling of self-oscillating flyback converter with applied switching delay , 2006, IEEE Transactions on Power Electronics.

[10]  Abraham Pressman,et al.  Switching Power Supply Design , 1997 .

[11]  S. Beeby,et al.  Energy harvesting vibration sources for microsystems applications , 2006 .

[12]  F. Peano,et al.  Design and optimization of a MEMS electret-based capacitive energy scavenger , 2005, Journal of Microelectromechanical Systems.

[13]  Paul Muralt,et al.  Piezoelectric Thin Films for Sensors, Actuators, and Energy Harvesting , 2009 .

[14]  Milan M. Jovanovic,et al.  Analysis and design of self-oscillating flyback converter , 2002, APEC. Seventeenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.02CH37335).