Regenerative braking is a well-known technology applied in electric vehicles to achieve high energy efficiency through an energy-recovery mechanism. The same concept has been robotic applications, such as legged robots, lower-limb prostheses, and biomechanical harvesters. In particular, harvester enables humans generate watts of power while simultaneously assisting the human joints during walki...

An elliptically shaped electromagnetic vibration energy harvester is presented for two- and one-dimensional motions with the easy tuning of resonance frequency. The consists a free-to-move ring-shaped permanent magnet radial magnetization, set cube magnets distributed in fixed holder, two coil windings located above below harvester. When device exposed to vibrations, ring moves until magnetic r...

Portable electronics have fueled the rich emergence of new applications including multi-media handsets, ubiquitous smart sensors and actuators, and wearable or implantable biomedical devices. New ultra-low power circuit techniques are constantly being proposed to further improve the energy efficiency of electronic circuits. A critical part of these energy conscious systems are the energy proces...