Micro Thermoelectric Harvesting Device for Electromagnetic Micro Speaker in Hearing AID application

摘要

This paper presents a energy harvesting using micro scale thermoelectric generator is a promising approach to supply power in ultra low power devices. Here a microelectromechanical systems (MEMS) based thermoelectric generator is used to power up an electromagnetic micro speaker in Hearing aid applications. Electromagnetically actuated micro speaker reduces form factor, power consumption and increases energy efficiency in hearing aid applications. Thermoelectric generator uses a Seebeck principle which utilizes the temperature gradient between the human body (310K) and ambient temperature (298k). For electromagnetic micro speakers, low driving voltage is a unique characteristic. A low power electromagnetic micro speaker with a PDMS membrane for hearing aid is modeled. In this paper a model that includes the micro speaker and micro thermoelectric generator is described with various domain performances. These domains will be coupled where necessary and the model will focus on efficient power and less vibration for the micro speaker, which results in better hearing and safe for the hearing aid. The modeling and analysis is done using ANSYS and COMSOL Multiphysics.