Linear and Non Linear Behavior of Mechanical Resonators for Optimized Inertial Electromagnetic Microgenerators

Abstract
In this work, the design, fabrication and characterization of an electromagnetic inertial microgenerator compatible with Si micro-systems 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 observ the presence of non linear effects that lead to the appearance of hysteretic vibrational phenomenon. 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 non linear 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 environment.

最來算是紅火的一個研究，很多人都在做，因為可以節能嘛。利用磁生電，電生磁的原理來致動，非常簡單，但產生的功率為考量因素，另製作方法也是一個重點。

FROM HERE
C. Serrea, A. Pérez-Rodrígueza, N. Fondevillaa, E. Martincicc, J.R. Morantea, J. Montserratb, and J. Esteveb, "Linear and Non Linear Behavior of Mechanical Resonators for Optimized Inertial Electromagnetic Microgenerators", DTIP2008, 9-11 April 2008.