Generation of energy in console piezoelectric energy harvesters

Energy harvesting of mechanical vibrations and their conversion into electrical energy using piezoelectric devices has become widespread. This been made possible by the creation high-energy materials proliferation miniature with a few milliwatts power.
 In this work, oscillations rod cantilever bimorph harvester under harmonic loads are investigated. A two-layer consisting brass base rectangular element electroded flat surfaces without tip mass is considered. The thickness layers much less than width length, which allows us to use hypothesis sections assumptions potential difference linearity element, as well beams bending relations.
 There derived characteristic equation for beam oscillations, wave numbers, circular frequencies natural determined. carried out averaging material characteristics over cross-sectional area. Eigenforms constructed, dependence from body size analyzed.
 next step study forced harvesters at end given base. elastic line console formed, maximum deflections angles rotation voltage generated on piezo plates determined taking account resistance. Due resistance conduct power Curves load frequency external constructed. It established that change in proportion R. collector occurs vicinity resonances, before first resonance almost zero. Between second resonance, approximately 1,5 mW. During transition ultrasonic zone, increases significantly.Analysis operation resonant requires consideration damping material.