|Title||A Compact Human-Powered Energy Harvesting System|
|Publication Type||Conference Paper|
|Year of Publication||2013|
|Authors||Rao, Y., K. M. McEachern, and D. P. Arnold|
|Conference Name||PowerMEMS 2013|
|Conference Location||London, UK|
|Keywords||AC/DC converter, DC/DC converter, energy harvesting, resonant|
This paper presents a fully functional, self-sufficient body-worn energy harvesting system for passively capturing energy from human motion, with the long-term vision of supplying power to portable, wearable, or even implanted electronic devices. The system requires no external power supplies and can bootstrap from zero-state-of-charge to generate electrical energy from walking, jogging and cycling; convert the induced ac voltage to a dc voltage; and then boost and regulate the dc voltage to charge a Li-ion-polymer battery. Tested under normal human activities (walking, jogging, cycling) when worn on different parts of the body, the 70 cm3 system is shown to charge a 3.7 V rechargeable battery at charge rates ranging from 33 μW to 234 μW.