Gomáriz Castro, Spartacus

González, Julián

Masmitjà Rusiñol, Ivan

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17th TC-4 Workshop IWADC on ADC and DAC Modeling and TestingJuly 18th and 19th 2013   Barcelona 65   Experimental Results on Magnetic Cores for Magnetic Induction-Based Energy Harvesting  Measuring system and power management of the Guanay II AUV Tarcísio Oliveira de Moraes Júnior157, Yuri Percy Molina Rodriguez157, Cleonilson Protásio de Souza157Ewerton Cleudson Sousa Melo 157Ivan Masmitjà27, Julián González27, Spartacus Gomáriz27In this work it is presented an energy harvesting system based on disperse magnetic energy produced by electric current across power line of a power distribution network in order to supply en-ergy for devices in a wireless sensor network. The system is based on toroidal cores tested and validated with different materials and dimensions (five  based on ferrite, seven based on nanocrystalline, seven based on iron powder) aiming harvesting optimal power device. From principles of magnetic ferromagnetic materi-als, it is discussed the magnetic field theory to obtain energy for supplying power to devices. It was implemented a prototype consisting of a test bench capable of emulating power-line high currents and of a power conditioning circuit. Test procedures were executed in three parts. The first was to determine the magnetic parameters (e.g. relative permeability and magnetic curve) of each harvester using a circuit able to measure core permeability in or-der to obtain B x H cycle. The second was to test a proposed power conditioning circuit composed of an AC/DC rectifier and a voltage regulator. The third, the experimental results were compared with theoretical ones.  The obtained experimental results have been in agreement with theory, showing that the energy harvesting sys-tem is capable of supplying up to 315.6 mW from ferrite based core, 54mW from nanocrystalline based cores and 0.77mW from iron powder based ones, by capturing magnetic dispersion pro-duced by a 15A current in the power line, which can be applied to various low power devices, mainly in wireless sensor network for data acquisition and control parameters of the power line itself.This paper presents a measurement system and energy man-agement for Guanay II autonomous underwater vehicle (AUV). The system performs the measurement, monitoring and con-trol of the state of charge of the batteries, allowing simultane-ous charging of all batteries from outside of the vehicle, and a wireless connection/disconnection mode. Considering the type of batteries used in the vehicle, it is used the current inte-gration as methodology for measuring the charge level of the battery. Laboratory and vehicle navigation tests performed have validated the correct operation of the system and the re-liability of the measured data. These data are sent to the mis-sion control of the vehicle in order to optimize and guarantee its navigation. Keywords– state of charge, batteries, AUVThe simple scheme of an energy harvesting system based on disperse magnetic energy.Consumption of the vehicle versus power of the propellers19WN14620MT102

Measuring system and power management of the Guanay II AUV

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