|Title||A Bridge Voltage Doubler AC/DC Converter for Low-Voltage Energy Harvesting Applications|
|Publication Type||Conference Paper|
|Year of Publication||2009|
|Authors||Cheng, S., Y. Jin, Y. Rao, and D. P. Arnold|
|Conference Name||Tech. Dig. 9th Int. Workshop on Micro and Nanotechnology for Power Generation and Energy Conversion Apps. (PowerMEMS 2009), Washington DC, pp. 25-28,|
Efficient ac/dc rectification of low voltages is critical for the realization of fully-functional vibrational energy harvesting systems. This paper presents the design and experimental characterization of low-power ac/dc converter designed to operate with very low input voltage amplitudes (as low as 20 mV) for magnetic induction energy harvesters. The bridge voltage doubler provides a dc output voltage that is twice the ac input amplitude. A maximum efficiency of 92% was achieved for a 1 V input amplitude. Even with input amplitudes as low as 100 mV, efficiency could exceed 70%. The circuit also functioned properly when connected to a magnetic energy harvester device.