Supplying electric power to information and communication devices is a critical issue for both current mobile networks and coming ubiquitous systems. To achieve this, we focus on dynamic energy conversion systems that utilize human vibrations in daily life. The gyroscopic power generator has a rotor, which moves three dimensionally and spins at a high speed from low frequency vibrations, such as human movements. In this paper, simple equations that indicate the relationships among input vibration, rotor movement, impedance of the output circuit, and the critical conditions for stable rotation are derived. Next, by measuring the phase difference between input vibration and rotor precession angle, and critical conditions for stability using prototype generators, validity of the theory is verified.
Financed by the National Centre for Research and Development under grant No. SP/I/1/77065/10 by the strategic scientific research and experimental development program:
SYNAT - “Interdisciplinary System for Interactive Scientific and Scientific-Technical Information”.