Modeling and design of a multi-pole linear energy harvest system
Abstract
In numerous applications, there is a desire to convert energy stored in stray mechanical motion (vibration) to electromagnetic fields. In this research, an initial focus is to develop a model that can be used to analyze and design such systems. To this end, a time-domain model of a vibration/field energy harvester that consists of a multi-pole air-core permanent magnet, coil, diode rectifier, and constant-voltage load is developed. A novelty of the model is that the coil inductance is found using an algorithm that takes advantage of the symmetry properties of a coil’s winding structure. It is shown that this provides a numerically efficient and accurate method to evaluate alternative coil geometries. The use of the model is demonstrated within a population-based algorithm to design a system in which energy is harvested for the wireless transmission of the core temperature of free-roaming cattle. A primary objective of the design is to maximize the harvested energy subject to constraints on the system volume.
Degree
M.S.E.C.E.
Advisors
Pekarek, Purdue University.
Subject Area
Electrical engineering
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