Modeling and Experimental Verification of an Electromagnetic and Piezoelectric Hybrid Energy Harvester

Abstract

Abstract. This paper describes mathematical models of an electromagnetic and piezoelectric hybrid energy harvesting system and provides an analysis of the relationship between the resonance frequency and the configuration parameters of the system. An electromagnetic and piezoelectric energy harvesting device was designed and the experimental results showed good agreement with the analytical results. The maximum load power of the hybrid energy harvesting system achieved 4.25 mW at a resonant frequency of 18 Hz when the acceleration was 0.7 g, which is an increase of 15% compared with the 3.62 mW achieved by a single electromagnetic technique.

Performance of piezoelectric energy harvester with various ratio substrate and micro windmill

“…However, the frequency will decrease as the length of the substrate increases. As the width of the substrate increases, the frequency of collision increases [37]. It is the reason why the ratio of 1:1 to have better Vrms at each speed due to the width of substrate PEH at a ratio of 1:1 is higher than the ratio of 1:2 and the ratio of 1:3.…”