Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : October 26, 2020 - October 28, 2020
Piezoelectret is a group of perforated space-charged polymer structures, and recently attract much attention due to their softness and high piezoelectric coefficients. Prototypes for tactile sensing and vibrational/kinetic energy harvesting are proposed. However, discharge of piezoelectrets during operation limits the output power. In this study, electret discharge mechanisms both in air and solid are investigated from breakdown perspectives, and an optimal design method is proposed. The design based on the present method is validated through discharge experiments as well as power generation experiments. With the optimized device, it is expected to generate 130 μJ energy per pushing cycle, which is 8 times higher than our previous one.
