[논문]Extrapolating B-H Curve Data using Common Electrical Steel Characteristics for High Magnetic Saturation Applications

Chai, Seung-Hee; Kim, Ji-Hyun; Kim, Sung-Il; Hong, Jung-Pyo

doi:10.4283/jmag.2015.20.3.258

Extrapolating B-H Curve Data using Common Electrical Steel Characteristics for High Magnetic Saturation Applications 원문보기

Journal of magnetics, v.20 no.3, 2015년, pp.258 - 264

Chai, Seung-Hee (Department of Automotive Engineering, Hanyang University) , Kim, Ji-Hyun (Department of Automotive Engineering, Hanyang University) , Kim, Sung-Il (Motor R&D Group, Digital Appliances, Samsung Electronics) , Hong, Jung-Pyo (Department of Automotive Engineering, Hanyang University)

Abstract ▼ AI-Helper

In this paper, an adequate B-H curve extrapolation method is proposed and its reliability is verified through experiments. A method is developed to estimate the magnetic saturation induction from the density of the lamination core and electrical resistivity. The magnetic saturation induction of electrical steels measured using a vibration sample magnetometer are compared with the analytical results to validate the accuracy of the proposed estimation method. It is found that the predicted error in the magnetic saturation induction of the electrical steels are approximately 1.2% when the proposed method is used. The performance of interior permanent magnet synchronous motors that applies the proposed method are evaluated via 2D nonlinear finite element analysis and through experiments. Based on the obtained results, the extrapolated B-H curves from the estimated saturation induction can be used for various analyses in saturation region.

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제안 방법

In summary, this paper presents a novel method that estimates the magnetic saturation induction using the values of the density of the lamination core and the electrical resistivity, which can be conveniently obtained through the derivation of a mathematical formula using the Al and Si contents (wt%). Finally, the proposed method, which uses the quadratic equations to extrapolate from the magnetic saturation induction, is introduced and its applicability is discussed based on the result of a specimen test and a motor performance test.
In order to test the proposed extrapolation method, Epstein measurements are carried out for the five grades of electrical steel used as a representative soft magnetic material; these steels are commonly used in high power devices, with low, medium, or high Si and Al contents. The dimensions of the specimens are 3 mm × 3 mm, and the B–H curve data are averaged over five samples.
In summary, this paper presents a novel method that estimates the magnetic saturation induction using the values of the density of the lamination core and the electrical resistivity, which can be conveniently obtained through the derivation of a mathematical formula using the Al and Si contents (wt%). Finally, the proposed method, which uses the quadratic equations to extrapolate from the magnetic saturation induction, is introduced and its applicability is discussed based on the result of a specimen test and a motor performance test.
In this study, the B– H data is extrapolated using the quadratic function, and a novel method is proposed to calculate the required magnetic saturation induction value Js from specific resistance and density values of the material.
This paper investigated a novel method to estimate the magnetic saturation induction using only the density and the resistivity values of electrical steel. These parameters can conveniently be obtained through the derivation of a mathematical formula using the Al and Si contents (wt%).

대상 데이터

In order to verify the reliability of the proposed method, the calculated magnetic saturation induction and experimental values obtained using the VSM were compared. In the experiments, five grades of electrical steel were selected either with low, medium, or high Si and Al contents. The magnetic saturation inductions of the selected grades were tested using the VSM.

성능/효과

This result confirms that the proposed method for estimating the magnetic saturation induction of the electrical steel is reliable. Therefore, this study is unique because the parameters %Al and %Si are not required in order to estimate the magnetic saturation induction of the electrical steel, and the latter depends only on the density and resistivity parameters, which can easily be obtained. Furthermore, it is clearly determined that using the extrapolation method with the quadratic equation developed from the saturation induction can be appropriately applied in the design phase.
This result confirms that the proposed method for estimating the magnetic saturation induction of the electrical steel is reliable. Therefore, this study is unique because the parameters %Al and %Si are not required in order to estimate the magnetic saturation induction of the electrical steel, and the latter depends only on the density and resistivity parameters, which can easily be obtained.

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DOI : 10.4283/JMAG.2015.20.3.258 [무료]
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