Effect and compensation of ADC nonlinearity on magnetic accommodation measurements

► The influence of ADCs on the characterization of soft ferrites cores is analyzed. ► The effects of ADC INL on magnetic accommodation of minor loops is investigated. ► A new compensation technique based on physical symmetry property of magnetic material is proposed. ► The impact of a correct accomm...

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Bibliographic Details
Published in:Measurement : journal of the International Measurement Confederation 2013-04, Vol.46 (3), p.1340-1348
Main Authors: Attivissimo, F., Giaquinto, N., Marracci, M., Tellini, B.
Format: Article
Language:English
Subjects:
Accommodation
ADC integral nonlinearity
Compensation
Error analysis
Error compensation
Ferrite
Integrals
Magnetic accommodation
Magnetic hysteresis
Nonlinearity
Simulation
Soft magnetic materials
Symmetry
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Summary:► The influence of ADCs on the characterization of soft ferrites cores is analyzed. ► The effects of ADC INL on magnetic accommodation of minor loops is investigated. ► A new compensation technique based on physical symmetry property of magnetic material is proposed. ► The impact of a correct accommodation on the modeling validation is pointed out. ► The impact on design of high performance electrical machines is highlighted. In this paper we analyze how static errors of Analog-to-Digital converters (ADCs) can influence the measurement of magnetic accommodation in soft ferrite core. In a first analysis, the discussion is carried out through a series of simulated ADC INLs applied to simulated signals and experimental data. Possible impacts of the integral nonlinearity (INL) on the reconstruction of the B−H trajectory are shown. In a second phase, a real ADC INL is considered to better quantify the impact of real ADC errors on the measurements. An easy to implement procedure based on physical symmetry property of the material is presented and adopted to reduce the INL effect on magnetic accommodation measurements. Finally, a comparison between the proposed approach and a mid-point linearization compensation technique of INL is reported showing the validity of the presented procedure.
ISSN:0263-2241
1873-412X
DOI:10.1016/j.measurement.2012.11.006