Experimental Energy Recovery from a Backpack Using Various Harvester Concepts

Energy harvesting from human body kinetics is a crucial issue. The primary challenge lies in designing and opti - mizing the energy converter. This paper presents an analysis of energy harvesting using three variants of electro - magnetic harvesters designed for backpack integration. The first harvester comprises a single levitating magnet within a coil. The second concept involves a specially designed oscillating magnet consisting of two divided magnets with a separator. The third harvester variant utilizes two levitating magnets within the coil. The results indicate that, for harmonic excitation, the harvested power is the highest for the classical harvester with a single oscillating magnet. However, when integrated into a backpack, the concept of two levitating magnets proves to be more effective in lower speed ranges.