An Experimental Analysis of Circulating Current Control Circuit for Output Power from Vibration Generator for Vibration including the Third Harmonics

The vibration generators based on piezoelectric elements provide very low power. This research focuses on the method for improving in the output power. The previous research proposed a circulating current control circuit for improving in output power under only single frequency. This paper numerically and experimentally shows that the proposed circuit improves the output power for the vibration including the third harmonics.