Effect of Stray Inductance on the Characterization of Low Permeability Iron Powders in Ring-shaped Specimens

Mohammad Torabi Shahbaz; Daniel Wöckinger; Gerd Bramerdorfer

doi:10.1109/WEMDCD61816.2025.11014116

Effect of Stray Inductance on the Characterization of Low Permeability Iron Powders in Ring-shaped Specimens

Mohammad Torabi Shahbaz^*
, Daniel Wöckinger^*
, Gerd Bramerdorfer^*

^*Corresponding author for this work

Institute of Electric Machines and Power Electronics

Research output: Chapter in Book/Report/Conference proceeding › Conference proceedings › peer-review

Abstract

In this study, non-highly compressed powders are characterized to investigate the impact of stray flux inductance on their magnetic characterization. Different compositions of iron powder Fe and iron oxide powder Fe₂O₃ are mixed and prepared as samples, while a non-magnetic ring-shaped container is optimized and designed to accommodate them. A precise measuring system is employed to determine the material's relative permeability characteristics for all samples. The measurement results reveal a low permeability for all samples. The approach to compensating for the stray flux inductance is discussed. Different empty coils are prepared to examine the influence of stray inductance on measurement results. It is demonstrated that compensating for air inductance is significantly more important and necessary for samples with a permeability close to that of air.

Original language	English
Title of host publication	WEMDCD 2025
Subtitle of host publication	Workshop on Electrical Machines Design, Control and Diagnosis
Number of pages	6
Edition	1
ISBN (Electronic)	9798331520748
DOIs	https://doi.org/10.1109/WEMDCD61816.2025.11014116
Publication status	Published - 2025

Fields of science

202027 Mechatronics
202011 Electrical machines
202 Electrical Engineering, Electronics, Information Engineering
202025 Power electronics
202009 Electrical drive engineering

JKU Focus areas

Sustainable Development: Responsible Technologies and Management
Digital Transformation

Access to Document

10.1109/WEMDCD61816.2025.11014116

Cite this

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title = "Effect of Stray Inductance on the Characterization of Low Permeability Iron Powders in Ring-shaped Specimens",

abstract = "In this study, non-highly compressed powders are characterized to investigate the impact of stray flux inductance on their magnetic characterization. Different compositions of iron powder Fe and iron oxide powder Fe2O3 are mixed and prepared as samples, while a non-magnetic ring-shaped container is optimized and designed to accommodate them. A precise measuring system is employed to determine the material's relative permeability characteristics for all samples. The measurement results reveal a low permeability for all samples. The approach to compensating for the stray flux inductance is discussed. Different empty coils are prepared to examine the influence of stray inductance on measurement results. It is demonstrated that compensating for air inductance is significantly more important and necessary for samples with a permeability close to that of air.",

author = "\{Torabi Shahbaz\}, Mohammad and Daniel W{\"o}ckinger and Gerd Bramerdorfer",

year = "2025",

doi = "10.1109/WEMDCD61816.2025.11014116",

language = "English",

booktitle = "WEMDCD 2025",

edition = "1",

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Effect of Stray Inductance on the Characterization of Low Permeability Iron Powders in Ring-shaped Specimens. / Torabi Shahbaz, Mohammad; Wöckinger, Daniel ; Bramerdorfer, Gerd.
WEMDCD 2025: Workshop on Electrical Machines Design, Control and Diagnosis. 1. ed. 2025.

Research output: Chapter in Book/Report/Conference proceeding › Conference proceedings › peer-review

TY - GEN

T1 - Effect of Stray Inductance on the Characterization of Low Permeability Iron Powders in Ring-shaped Specimens

AU - Torabi Shahbaz, Mohammad

AU - Wöckinger, Daniel

AU - Bramerdorfer, Gerd

PY - 2025

Y1 - 2025

N2 - In this study, non-highly compressed powders are characterized to investigate the impact of stray flux inductance on their magnetic characterization. Different compositions of iron powder Fe and iron oxide powder Fe2O3 are mixed and prepared as samples, while a non-magnetic ring-shaped container is optimized and designed to accommodate them. A precise measuring system is employed to determine the material's relative permeability characteristics for all samples. The measurement results reveal a low permeability for all samples. The approach to compensating for the stray flux inductance is discussed. Different empty coils are prepared to examine the influence of stray inductance on measurement results. It is demonstrated that compensating for air inductance is significantly more important and necessary for samples with a permeability close to that of air.

AB - In this study, non-highly compressed powders are characterized to investigate the impact of stray flux inductance on their magnetic characterization. Different compositions of iron powder Fe and iron oxide powder Fe2O3 are mixed and prepared as samples, while a non-magnetic ring-shaped container is optimized and designed to accommodate them. A precise measuring system is employed to determine the material's relative permeability characteristics for all samples. The measurement results reveal a low permeability for all samples. The approach to compensating for the stray flux inductance is discussed. Different empty coils are prepared to examine the influence of stray inductance on measurement results. It is demonstrated that compensating for air inductance is significantly more important and necessary for samples with a permeability close to that of air.

UR - https://www.scopus.com/pages/publications/105029832600

U2 - 10.1109/WEMDCD61816.2025.11014116

DO - 10.1109/WEMDCD61816.2025.11014116

M3 - Conference proceedings

BT - WEMDCD 2025

ER -

Effect of Stray Inductance on the Characterization of Low Permeability Iron Powders in Ring-shaped Specimens

Abstract

Fields of science

JKU Focus areas

Access to Document

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Electric Machines with Inherent Speed-Dependent Characteristics for More Sustainable and Efficient Energy Conversion