Authors: C Serre A PérezRodríguez N Fondevilla E Martincic J R Morante J Montserrat J Esteve
Publish Date: 2009/03/31
Volume: 15, Issue: 8, Pages: 1217-1223
Abstract
In this work the design fabrication and characterization of an electromagnetic inertial microgenerator compatible with Si microsystems technology is presented The device includes a fixed micromachined coil and a movable magnet mounted on a resonant polymeric structure The characterization of the fabricated prototypes has allowed to observe the presence of nonlinear effects that lead to the appearance of hysteretic vibrational phenomenon and strongly affect the output of the microgenerator These effects are likely related to the mechanical characteristics of the polymeric membrane and determine an additional dependence of vibration frequency on the excitation amplitude Under such nonlinear conditions power densities up to 40 μW/cm3 are obtained for devices working with low level excitation conditions similar to those present in domestic and office environmentEME is a member of CEMIC Center of Microsystems Engineering of the “Generalitat de Catalunya” The funding of this work by the IST program of the European Commission under the SENSATION project ref FP6507231 is acknowledged by the authors from the University of Barcelona This work was also supported by grant SAB2006165 to E Martincic from the Spanish “Ministerio de Educación y Ciencia” The clean room processes described in this work were also supported by a grant to N Fondevilla within the GICSERV2007 program from the Spanish “Ministerio de Educación y Ciencia”
Keywords: