Abstract
The integration of differential-mode (DM) and common-mode (CM) inductors onto a single core has been expected to miniaturize EMC filters. On the other hand, this technique possibly leads to lower tolerance to magnetic saturation caused by the DC flux, hindering the miniaturization effect due to integration. Particularly, this problem seems to be exacerbated in the previously reported magnetic structure. The reason may lie in the fact that this conventional structure tends to induce a large DC flux because its equivalent number of turns for the DM inductance is restricted to only half of the total number of turns. This paper addresses this problem by proposing a novel structure that assigns more turns to the DM inductance to suppress the DC flux more effectively. A theoretical analysis and experiments verified that the proposed structure is equivalent to series-connected DM and CM inductors. Additionally, an analytical estimation revealed that the proposed structure reduced the core volume by 41% compared to the conventional structure for the same wire length. These results demonstrate effectiveness of the proposed structure for miniaturizing EMC filters.
| Original language | English |
|---|---|
| Pages (from-to) | 166-173 |
| Number of pages | 8 |
| Journal | IEEJ Journal of Industry Applications |
| Volume | 4 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 2015 |
Fingerprint
Keywords
- Common-mode inductor
- Differential-mode inductor
- EMC filter
- Integrated magnetic component
ASJC Scopus subject areas
- Energy Engineering and Power Technology
- Automotive Engineering
- Electrical and Electronic Engineering
- Industrial and Manufacturing Engineering
- Mechanical Engineering
Cite this
A magnetic structure integrating differential-mode and common-mode inductors with improved tolerance to DC saturation. / Umetani, Kazuhiro; Tera, Takahiro; Shirakawa, Kazuhrio.
In: IEEJ Journal of Industry Applications, Vol. 4, No. 3, 2015, p. 166-173.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - A magnetic structure integrating differential-mode and common-mode inductors with improved tolerance to DC saturation
AU - Umetani, Kazuhiro
AU - Tera, Takahiro
AU - Shirakawa, Kazuhrio
PY - 2015
Y1 - 2015
N2 - The integration of differential-mode (DM) and common-mode (CM) inductors onto a single core has been expected to miniaturize EMC filters. On the other hand, this technique possibly leads to lower tolerance to magnetic saturation caused by the DC flux, hindering the miniaturization effect due to integration. Particularly, this problem seems to be exacerbated in the previously reported magnetic structure. The reason may lie in the fact that this conventional structure tends to induce a large DC flux because its equivalent number of turns for the DM inductance is restricted to only half of the total number of turns. This paper addresses this problem by proposing a novel structure that assigns more turns to the DM inductance to suppress the DC flux more effectively. A theoretical analysis and experiments verified that the proposed structure is equivalent to series-connected DM and CM inductors. Additionally, an analytical estimation revealed that the proposed structure reduced the core volume by 41% compared to the conventional structure for the same wire length. These results demonstrate effectiveness of the proposed structure for miniaturizing EMC filters.
AB - The integration of differential-mode (DM) and common-mode (CM) inductors onto a single core has been expected to miniaturize EMC filters. On the other hand, this technique possibly leads to lower tolerance to magnetic saturation caused by the DC flux, hindering the miniaturization effect due to integration. Particularly, this problem seems to be exacerbated in the previously reported magnetic structure. The reason may lie in the fact that this conventional structure tends to induce a large DC flux because its equivalent number of turns for the DM inductance is restricted to only half of the total number of turns. This paper addresses this problem by proposing a novel structure that assigns more turns to the DM inductance to suppress the DC flux more effectively. A theoretical analysis and experiments verified that the proposed structure is equivalent to series-connected DM and CM inductors. Additionally, an analytical estimation revealed that the proposed structure reduced the core volume by 41% compared to the conventional structure for the same wire length. These results demonstrate effectiveness of the proposed structure for miniaturizing EMC filters.
KW - Common-mode inductor
KW - Differential-mode inductor
KW - EMC filter
KW - Integrated magnetic component
UR - http://www.scopus.com/inward/record.url?scp=84983341374&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84983341374&partnerID=8YFLogxK
U2 - 10.1541/ieejjia.4.166
DO - 10.1541/ieejjia.4.166
M3 - Article
VL - 4
SP - 166
EP - 173
JO - IEEJ Journal of Industry Applications
JF - IEEJ Journal of Industry Applications
SN - 2187-1094
IS - 3
ER -