A Power Supply of Self-Powered Online Monitoring Systems for Power Cords

This paper presents a power supply of self-powered online monitoring systems for power cords. The proposed power supply obtains energy from the magnetic field induced by wire-carrying currents using a specially designed coil-based magnetic energy harvester (CMEH). The CMEH reduces the influence of t...

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Bibliographic Details
Published inIEEE transactions on energy conversion Vol. 28; no. 4; pp. 921 - 928
Main Authors Wu, Zhiyi, Wen, Yumei, Li, Ping
Format Journal Article
LanguageEnglish
Published IEEE 01.12.2013
Subjects
Energy harvesting
Low dropout regulator
Magnetic cores
magnetic energy harvester
Magnetic flux leakage
Monitoring
online monitoring system
power cord
Power supplies
power supply
Supercapacitors
Voltage control
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Summary:This paper presents a power supply of self-powered online monitoring systems for power cords. The proposed power supply obtains energy from the magnetic field induced by wire-carrying currents using a specially designed coil-based magnetic energy harvester (CMEH). The CMEH reduces the influence of the magnetic flux leakage and can harvest enough energy, especially when the wire-carrying current is small. The magnetic core of the CMEH contains two special C-cores and all end faces are tooth profile. The relationship between the magnetic flux leakage and the number of teeth has been analyzed. The design details of the power supply circuit including the unit for power management and overvoltage protection are given in this paper. Test results show that the overvoltage protective unit can protect the supercapacitor from over its max operating voltage. With the low dropout regulator unit function, the power supply is capable of providing a stable output voltage.
ISSN:0885-8969
1558-0059
DOI:10.1109/TEC.2013.2281075