Experimental Verification of Isotropic and Anisotropic Anhysteretic Magnetization Models

Nowicki, Michał; Szewczyk, Roman; Nowak, Paweł

doi:10.3390/ma12091549

Cited by 13 publications

(6 citation statements)

References 26 publications

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“…Possible alternatives for the shapes of reference defects are single cylinder, single sphere, or multiple spheres. Additionally, further research may include non-linear dependence of magnetic permeability as a function of external magnetic field [37,38] in modeling.…”

Section: Discussionmentioning

confidence: 99%

Inverse Transformation in Eddy Current Tomography with Continuous Optimization of Reference Defect Parameters

2021

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This paper presents a methodology of inverse tomography transformation in eddy current tomography with the use of continuous optimization of reference defect parameters. Ferromagnetic steel samples with rectangular air inclusion defects of known dimensions were prepared and measured using an eddy current tomography setup. FEM-based (Finite Element Method based) forward tomography transformation was developed and utilized in inverse tomography transformation. The presented method of inverse tomography transformation is based on the continuous optimization of parameters that can describe the sample, such as the diameter and dimensions of the reference defect. The obtained results of inverse tomography transformation were in high accordance with the real parameters of the samples. Additionally, the presented method had acceptable repeatability. The obtained values of the sample parameters fit within the range of expanded uncertainty when compared to the real parameters of the sample.

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Section: Discussionmentioning

confidence: 99%

Inverse Transformation in Eddy Current Tomography with Continuous Optimization of Reference Defect Parameters

2021

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“…A new magnetic model is proposed which replaces the linear term in the LineArc model with a Langevin function to represent a reversible fraction of magnetic material (equation ( 13)). The arctangent function has been retained for the irreversible fraction because the LineArc model successfully approximates the hysteresis loop power (equation ( 14)) [6,10]. The derivative of the Langevin function represents the susceptibility of the reversible fraction of the material.…”

Section: Developing a New Hysteresis Modelmentioning

confidence: 99%

A simplified model for minor and major loop magnetic hysteresis and its application for inference of temperature in induction heated particle beds

Noble,

Bending,

Muxworthy

et al. 2023

J. Phys. D: Appl. Phys.

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In this work, a LangArc model is presented that successfully fits both major and minor hysteresis loops of a bed of magnetic particles in real time using instruments that detect changes in the magnetic field strength, such as in-situ pick-up coils. A novel temperature measurement application is demonstrated based on a real-time characterisation of a magnetic material, in this case magnetite, as a function of temperature. Magnetic hysteresis can be used to provide useful induction heating in a packed bed of magnetic materials. This can be used for general heating and to provide energy to chemical reactions in chemical processes. Accurate temperature measurement of magnetic particles under induction heating is a well-known challenge: conventional techniques give a single-point measurement, and are subject to inaccuracy due to self-heating of the instrument tip. Thermal lag can be problematic given the rapid heating rates that are characteristic of induction heating. The LangArc inferred temperature measurement technique is shown to detect heating rates in excess of 30 °C·s-1, under which circumstances an in-bed thermocouple was shown to lag by as much as 180 °C. This new method has significant importance for temperature measurement in applications involving the induction heating of magnetic materials as it avoids the location of an instrument inside the magnetic particle bed and is highly responsive under rapid heating where other techniques can give misleading results.

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“…The non-hysteresis curve in the JA model is the Langevin function, and as long as it conforms to experimental data, other forms of functions can also be used as non-hysteresis curves [102], such as the Brioullin function, Erf function, etc. [103]. Different types of curves are suitable for materials with different internal structures (for example, polycrystalline, amorphous, nanomaterials, etc.…”

Section: Jiles-atherton Modelmentioning

confidence: 99%

A Review on Analysis Methods and Research Status of Hysteresis Motor

Gao,

Cheng,

Zhao

et al. 2023

Energies

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A hysteresis motor produces output torque through the hysteresis effect of magnetic materials. It has the advantages of a simple structure, high-speed operation, high temperature resistance, low noise and self-starting capability. It can be applied to some special occasions requiring high speed and high stationarity. However, its disadvantage is low torque density, low efficiency and low power factor. The permanent magnet hysteresis motor is a compromise of the characteristics of permanent magnet motor and hysteresis motor, and it can be self-starting in the case of having a torque density comparable to that of a permanent magnet motor. In addition, there are some new structures of hysteresis motors, which open up the direction for innovative applications. Due to the complexity of magnetic properties, the calculation methods and dynamic models of hysteresis motors and permanent magnet hysteresis motors are special and also depend on the research of hysteresis materials and hysteresis models. This paper starts from the principle and classification of the hysteresis motor, and different structures and the corresponding analysis methods are reviewed. The motors with new structures and new methods are emphasized, the innovation and contribution of existing research are summarized, and the development trend of hysteresis motors is described.

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Experimental Verification of Isotropic and Anisotropic Anhysteretic Magnetization Models

Cited by 13 publications

References 26 publications

Inverse Transformation in Eddy Current Tomography with Continuous Optimization of Reference Defect Parameters

Inverse Transformation in Eddy Current Tomography with Continuous Optimization of Reference Defect Parameters

A simplified model for minor and major loop magnetic hysteresis and its application for inference of temperature in induction heated particle beds

A Review on Analysis Methods and Research Status of Hysteresis Motor

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