Linearity Range of an Eddy Current Displacement Sensor in Relation to the Fe Film Thickness of Magnetoplated Wire

Mizuno, T.; Enoki, Shigemi; Asahina, Takashi; Suzuki, Takayuki; Noda, Masahiro; Shinagawa, Hiroki; Uehara, Seisaku; Kitazawa, Hiroshi

doi:10.3379/jmsjmag.31.103

Cited by 4 publications

(4 citation statements)

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“…The increase of hysteresis loss might result in the increase of the average core loss as the coating thickness increased. A similar behavior was also observed in magnetoplated wire [19]. Mizuno et al [19] studied the effect of Fe film thickness on the properties of magnetoplated wire for eddy current displacement sensor and found that among three Fe film thicknesses-i.e.…”

Section: Discussionmentioning

confidence: 51%

See 1 more Smart Citation

Reduction of core loss in non-oriented (NO) electrical steel by electroless-plated magnetic coating

Chivavibul

Enoki

Konda

et al. 2011

Journal of Magnetism and Magnetic Materials

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Section: Discussionmentioning

confidence: 51%

“…A similar behavior was also observed in magnetoplated wire [19]. Mizuno et al [19] studied the effect of Fe film thickness on the properties of magnetoplated wire for eddy current displacement sensor and found that among three Fe film thicknesses-i.e. 0.7, 1, and 1.1 mm, the 1-mm film yielded the best quality factor.…”

Section: Discussionmentioning

confidence: 51%

Reduction of core loss in non-oriented (NO) electrical steel by electroless-plated magnetic coating

Chivavibul

Enoki

Konda

et al. 2011

Journal of Magnetism and Magnetic Materials

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“…Due to such structure, magnetic flux penetrating in the copper wire can be reduced, which leads to suppression of eddy currents (ECs) caused by proximity effect. Thus, the use of MPW is considered in magnetoplated (MP) coils for converters, transformers, and contactless power transfer systems as well as in EC displacement sensors …”

Section: Introductionmentioning

confidence: 99%

“…Thus, the use of MPW is considered in magnetoplated (MP) coils for converters, transformers, and contactless power transfer systems [1][2][3][4] as well as in EC displacement sensors. 5 When applying finite element analysis (FEA) to electric devices, a coil must be divided into finite elements (FEs) in order to involve ECs in analysis. Particularly, skin effect and proximity effect become pronounced as driving frequency is increased, and these effects must be taken into account in element division.…”

Section: Introductionmentioning

confidence: 99%

Finite element analysis of multi‐turn magnetoplated coils using homogenization method

Fujita

Igarashi

2018

Electrical Engineering Japan

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Magnetoplated wires (MPW) are effective to reduce eddy current losses in power devices such as converters and contactless power transfer systems. In the conventional finite element analysis (FEA) of MPW, elements must be sufficiently smaller than the skin depth. This results in large number of unknowns. This article proposes a homogenization method using complex permeability for FEA of magnetoplated coils so as to circumvent this problem. The coil impedances obtained by the proposed method with coarse elements are shown to agree well with those computed in the conventional FEA with fine elements.

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Dependence of Efficiency on Wire Type and Number of Strands of Litz Wire for Wireless Power Transfer of Magnetic Resonant Coupling

Matsumoto¹,

Ueda²,

Yachi³

et al. 2014

IEEJ Journal IA

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Wireless power transfer is expected to be applied to portable devices and electric automobiles in the future. To achieve this, it is necessary to improve the transmission efficiency of the coils used in wireless power transfer, that is, to improve the quality factor and coupling coefficient of the coils. To improve the quality factor of the coils, the authors propose the use of a litz wire with a magnetoplated wire (MPW), which is a copper wire plated with a thin iron film. The MPW increases the quality factor of the coils by reducing the AC resistance owing to the proximity effect. In this study, the effect of the number of strands of a litz wire on the quality factor of the coils and efficiency characteristics is considered. Moreover, the quality factor of the coils and efficiency characteristics using three types of coil-a solid copper wire (COW), a litz wire with a copper wire (LCW), and a litz wire with an MPW (LMW)-are considered. At the transmission frequency f = 13.56 MHz, it is experimentally demonstrated that many strands, whose number becomes the highest in terms of the quality factor of the coils, exist. The transmission efficiencies of the COW, LCW and LMW coils at an output power of 5 W and a transmission distance of 9 mm are 89%, 84%, and 91%, respectively, and the efficiency of the LMW coil is the highest. Also, in this case, the temperature increases of the COW, LCW, and LMW coils are 12 • , 16 • , and 10 • , respectively, and the LMW coil reduces the temperature increase.

show abstract

Linearity Range of an Eddy Current Displacement Sensor in Relation to the Fe Film Thickness of Magnetoplated Wire

Cited by 4 publications

References 1 publication

Reduction of core loss in non-oriented (NO) electrical steel by electroless-plated magnetic coating

Reduction of core loss in non-oriented (NO) electrical steel by electroless-plated magnetic coating

Finite element analysis of multi‐turn magnetoplated coils using homogenization method

Dependence of Efficiency on Wire Type and Number of Strands of Litz Wire for Wireless Power Transfer of Magnetic Resonant Coupling

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