Spherical Magnetic Generators for Bio-Motional Energy Harvesting

TitleSpherical Magnetic Generators for Bio-Motional Energy Harvesting
Publication TypeConference Paper
Year of Publication2008
AuthorsBowers, B., and D. P. Arnold
Conference NameTech. Dig. 8th Int. Workshop on Micro and Nanotechnology for Power Generation and Energy Conversion Apps. (Power MEMS 2008)
Date PublishedNovember
Conference LocationSendai, Japan

This paper presents the development of non-resonant, vibrational energy harvester architectures intended for human-motion energy scavenging. The basic design employs a spherical, unidirectionally-magnetized permanent magnet (NdFeB) ball that is allowed to arbitrarily move in a spherical cavity wrapped with copper coil windings. As the ball rotates and translates within the cage, the time-varying magnetic flux induces a voltage in the coil according to Faraday