Abstract

The purpose of this paper is to analyze the magnetic field distribution over a disc with magnets. This disk is part of an electromagnetic microgenerator that allows the generation of electricity as a result of changes in the magnetic field. The other part of the microgenerator is the structure of the coils. In the previous work of the authors, a complete microgenerator system was presented where the coils were made using thick-film and low-temperature co-fired ceramic (LTCC) technology. Several studies related to the influence of the shape and number of coils on the generated power were carried out, as well as the realization of complete electromagnetic microgenerators with voltage rectifying circuits. Until now, a disc with 28 neodymium magnets of size 10 × 3 × 1.5 mm3 was used for testing. In order to optimize the structure of the microgenerator with respect to the disc with magnets and thus increase the generated power, it was decided to perform appropriate tests to analyze the magnetic field distribution for several configurations of the disc varying in the shape and the dimensions of the magnets. Simulations were performed in COMSOL Multiphysics using the finite element method.

Highlights

  • The development of electronics and the continuous miniaturization of systems causes an increase in the demand for electricity

  • This paper presents the simulation results of the magnetic flux density generated by four configurations of magnets on the disc, differing in their shape and dimensions

  • The total magnetic field in a single segment with a magnet is proportional to the area of the magnet; For magnets in the shape of a rectangular prism, the distances between adjacent magnets increase along with the distance of the analyzed point from the center of the target

Read more

Summary

Introduction

The development of electronics and the continuous miniaturization of systems causes an increase in the demand for electricity. An increasingly popular method of powering such devices is to recover electrical energy (energy harvesters) from renewable sources. Electromagnetic microgenerators make it possible to obtain useful electrical energy from the environment (wind energy, kinetic energy). The principle of their operation is based on the phenomenon of electromagnetic induction, consisting of the induction of current in the coils as a result of changes in the magnetic field. Each such microgenerator has two basic elements—coils and magnets (most often neodymium ones). The coils (inductors) used here are made by wire winding [1], etching of printed circuit boards (PCBs) [2,3], liquid metal forming technique [4], the lithographie, galvanoformung, abformung (LIGA)

Objectives
Methods
Results
Conclusion
Full Text
Published version (Free)

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call