Modelling of silicon based electrostatic energy harvester for cardiac implants

Abstract

The concept of energy harvesting using the ability of heart to develop an acceptable amount of power for its natural operation (up to 10W) could address the power source requirements of leadless pacemakers. This paper presents a new structural geometry of silicon based electrostatic energy harvester for pacemakers uses angled electrodes unlike the traditional harvesters. It is observed that this topology provides a greater change of capacitance with respect to displacement compared to conventional topologies as it combines both in-plane gap and in-plane area overlap capacitances. This harvester can thus be used as an alternate to the conventional battery sources used and act as a constant voltage source for various components of the pacemaker.