In this paper, a novel broadband hybrid piezoelectric-electromagnetic-electrostatic energy harvester with frequency up-conversion is proposed to improve the harvesting bandwidth and energy conversion efficiency. The harvester configuration was optimized by adjusting the number of levitating magnets and fixed. . This paper presents an electromagnetic translational–rotary motion impact energy harvester based on a magnetic cylinder rotated around a fixed magnetic ring. It is beneficial for capturing impact energy generated by natural human motions, such as clapping, boxing, and stomping.
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