Magnetic Interference Compensation Using the Adaptive LMS Algorithm

The aim of this study is to evaluate the method for the compensation of magnetic field interference from the mains, which consists primarily of components with a frequency of 50 (60) Hz and its multiples. The setup compensates for the interfering field using three Helmholtz coils, magnetic field sen...

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Bibliographic Details
Published inElectronics (Basel) Vol. 12; no. 11; p. 2360
Main Authors Ponikvar, Dušan, Zupanič, Erik, Jeglič, Peter
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 23.05.2023
Subjects
Adaptive algorithms
Algorithms
Coils
Compensation
Control
Digital signal processors
Digitization
Frequency ranges
Harmonics (Electric waves)
Higher harmonics
Interference
Magnetic fields
Noise levels
Power
Power amplifiers
Sensors
Signal processing
Slovenia
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Summary:The aim of this study is to evaluate the method for the compensation of magnetic field interference from the mains, which consists primarily of components with a frequency of 50 (60) Hz and its multiples. The setup compensates for the interfering field using three Helmholtz coils, magnetic field sensors, a digital processing unit, and power amplifiers. The processing unit implements an adaptive least-mean-square (LMS) algorithm to calculate the currents through coils that are necessary for compensation. The prototype fully compensates for interfering with the magnetic field at 50, 150, 250, and 350 Hz down to the noise level of the sensor arrangement within 20 s and reduces higher harmonics. The overall reduction in the rms value of the interfering field is better than 28 dB, and a significantly better reduction is achieved in the frequency range from 0 Hz to 400 Hz.
ISSN:2079-9292
2079-9292
DOI:10.3390/electronics12112360