A new dc-CT utilizing the skin effect of a conducting current in a small magnetic pipe

Masahiro Yamaguchi; Hiroyuki Hojo; Hidetoshi Matsuki; Tadaaki Watanabe; Koichi Murakami

doi:10.1063/1.342275

A new dc-CT utilizing the skin effect of a conducting current in a small magnetic pipe

Masahiro Yamaguchi, Hiroyuki Hojo, Hidetoshi Matsuki, Tadaaki Watanabe, Koichi Murakami

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

This paper proposes a new method for noncontact measurement of the dc current. This device utilizes the skin effect of an ac current flowing in a ferromagnetic pipe with an amorphous-tape wound structure. The dc current controls the skin depth of the ac current. This dc-current transformer (CT) has no winding and outputs the difference between the terminal voltage of the pipe and the induced voltage in a one-turn coil. The ac current does not affect the dc line because of axis symmetry. A linear relation between the output and dc current is obtained when an appropriate ac drive frequency is selected. Improvement of gain can be attained by reducing the diameter. It is clarified that the magnetic pipe is applicable for a dc-CT with a small size.

Original language	English
Pages (from-to)	5687-5689
Number of pages	3
Journal	Journal of Applied Physics
Volume	64
Issue number	10
DOIs	https://doi.org/10.1063/1.342275
Publication status	Published - 1988 Dec 1

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1063/1.342275

Fingerprint Dive into the research topics of 'A new dc-CT utilizing the skin effect of a conducting current in a small magnetic pipe'. Together they form a unique fingerprint.

Cite this

@article{b8ab0399b0fe4412aef7e221cb215b89,

title = "A new dc-CT utilizing the skin effect of a conducting current in a small magnetic pipe",

abstract = "This paper proposes a new method for noncontact measurement of the dc current. This device utilizes the skin effect of an ac current flowing in a ferromagnetic pipe with an amorphous-tape wound structure. The dc current controls the skin depth of the ac current. This dc-current transformer (CT) has no winding and outputs the difference between the terminal voltage of the pipe and the induced voltage in a one-turn coil. The ac current does not affect the dc line because of axis symmetry. A linear relation between the output and dc current is obtained when an appropriate ac drive frequency is selected. Improvement of gain can be attained by reducing the diameter. It is clarified that the magnetic pipe is applicable for a dc-CT with a small size.",

author = "Masahiro Yamaguchi and Hiroyuki Hojo and Hidetoshi Matsuki and Tadaaki Watanabe and Koichi Murakami",

year = "1988",

month = dec,

day = "1",

doi = "10.1063/1.342275",

language = "English",

volume = "64",

pages = "5687--5689",

journal = "Journal of Applied Physics",

issn = "0021-8979",

publisher = "American Institute of Physics Publising LLC",

number = "10",

}

TY - JOUR

T1 - A new dc-CT utilizing the skin effect of a conducting current in a small magnetic pipe

AU - Yamaguchi, Masahiro

AU - Hojo, Hiroyuki

AU - Matsuki, Hidetoshi

AU - Watanabe, Tadaaki

AU - Murakami, Koichi

PY - 1988/12/1

Y1 - 1988/12/1

N2 - This paper proposes a new method for noncontact measurement of the dc current. This device utilizes the skin effect of an ac current flowing in a ferromagnetic pipe with an amorphous-tape wound structure. The dc current controls the skin depth of the ac current. This dc-current transformer (CT) has no winding and outputs the difference between the terminal voltage of the pipe and the induced voltage in a one-turn coil. The ac current does not affect the dc line because of axis symmetry. A linear relation between the output and dc current is obtained when an appropriate ac drive frequency is selected. Improvement of gain can be attained by reducing the diameter. It is clarified that the magnetic pipe is applicable for a dc-CT with a small size.

AB - This paper proposes a new method for noncontact measurement of the dc current. This device utilizes the skin effect of an ac current flowing in a ferromagnetic pipe with an amorphous-tape wound structure. The dc current controls the skin depth of the ac current. This dc-current transformer (CT) has no winding and outputs the difference between the terminal voltage of the pipe and the induced voltage in a one-turn coil. The ac current does not affect the dc line because of axis symmetry. A linear relation between the output and dc current is obtained when an appropriate ac drive frequency is selected. Improvement of gain can be attained by reducing the diameter. It is clarified that the magnetic pipe is applicable for a dc-CT with a small size.

UR - http://www.scopus.com/inward/record.url?scp=36549100975&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=36549100975&partnerID=8YFLogxK

U2 - 10.1063/1.342275

DO - 10.1063/1.342275

M3 - Article

AN - SCOPUS:36549100975

VL - 64

SP - 5687

EP - 5689

JO - Journal of Applied Physics

JF - Journal of Applied Physics

SN - 0021-8979

IS - 10

ER -