Improvement in Output Power of Vibration Generators based on Piezoelectric Elements using Passive Devices

Abstract

Since piezoelectric elements convert mechanical vibration into electrical power, vibration generators based on piezoelectric elements have been highlighted as low-power sources. This paper investigates the output power improvement of vibration generators based on piezoelectric elements using a passive device, such as an inductor. The proposed circuit is focused on the LC resonance between the added inductor and the internal capacitor. The validity of the proposed circuit is verified both numerically and experimentally.