Presentation 2020-07-02
A simplified simulation method of common-mode current considering imbalances of signal sources
Takato Yonemura, Koichi Kikuchi, Tohlu Matsushima, Yuki Fukumoto,
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Abstract(in Japanese) (See Japanese page)
Abstract(in English) It is challenging to simulate electromagnetic phenomena, such as common-mode current for in-vehicle equipment that complies with the CIRPR 25 measurement standard, since the long and complicated wires cannot model accurately. Therefore, we propose an equivalent circuit model that is composed of a common-mode bundled cable and a common-mode excitation source in this report. Here, even if the original model is a differential transmission system, the common-mode current is generated due to the imbalances of components such as a common-mode filter, the cable and the termination circuit. The proposed model takes into account the Scd21 representing the mode conversion from differential-mode to common-mode, in addition to the Scc21 representing the transmission characteristic of common-mode. The calculated common-mode current flowing the cable by using the proposed model is in agreement with an average error of 3dB compared to the measurement for the circuit without the common-mode filter. It also agrees with an average error of 5dB compared to the measurement for the circuit with the common-mode filter.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) electromagnetic simulation / common-mode / common mode filter / Scc21 / Scd21
Paper # EMCJ2020-12
Date of Issue 2020-06-25 (EMCJ)

Conference Information
Committee EMCJ
Conference Date 2020/7/2(1days)
Place (in Japanese) (See Japanese page)
Place (in English) Online
Topics (in Japanese) (See Japanese page)
Topics (in English) Young Scientist Meeting
Chair Kensei Oh(Nagoya Inst. of Tech.)
Vice Chair Atsuhiro Nishikata(Tokyo Inst. of Tech.)
Secretary Atsuhiro Nishikata(Denso)
Assistant Nami Sasaki(Seiwa Electric MFG) / Hiroyoshi Shida(Tokin EMC Engineering) / Sho Muroga(Akita Univ.)

Paper Information
Registration To Technical Committee on Electromagnetic Compatibility
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) A simplified simulation method of common-mode current considering imbalances of signal sources
Sub Title (in English)
Keyword(1) electromagnetic simulation
Keyword(2) common-mode
Keyword(3) common mode filter
Keyword(4) Scc21
Keyword(5) Scd21
1st Author's Name Takato Yonemura
1st Author's Affiliation Kyushu Institute of Technology(Kyutech)
2nd Author's Name Koichi Kikuchi
2nd Author's Affiliation TDK Corporation(TDK)
3rd Author's Name Tohlu Matsushima
3rd Author's Affiliation Kyushu Institute of Technology(Kyutech)
4th Author's Name Yuki Fukumoto
4th Author's Affiliation Kyushu Institute of Technology(Kyutech)
Date 2020-07-02
Paper # EMCJ2020-12
Volume (vol) vol.120
Number (no) EMCJ-83
Page pp.pp.7-12(EMCJ),
#Pages 6
Date of Issue 2020-06-25 (EMCJ)