Power Optimization of Vibration Energy Harvesters Utilizing Passive and Active Circuits

摘要: This article presents the maximum power operating conditions for piezoelectric energy harvesters when connected to several different circuit topologies. Four circuits are studied herein comparison: a simple resistive load, standard rectifier circuit, and parallel series synchronized switch harvesting on inductor. A single-mode model of vibration-based harvester under base excitation is developed capture important dynamics near its fundamental resonance while providing basis performing design optimization. Relevant dimensionless parameters given provide scale-free context discussing optimal points. For prescribed vibration harvester, frequency load impedance generation provided by results this study. Furthermore, effects mechanical damping, electromechanical coupling, quality factor, forward voltage presented. These discussed in order cite salient these systems.