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초록· 키워드
This paper proposes a common-mode (CM) choke with an asymmetrical CM winding and differential-mode (DM) noise suppression for low-power AC-to-DC power converters in sensor power modules. For a conventional CM choke with symmetrical winding, the CM and DM noises are also attenuated by the magnetizing inductance (L<sub>M</sub>) and very small leakage inductance (L<sub>k</sub>) owing to the higher coupling factor, respectively, of the CM choke. However, because the number of turns is limited according to the shape and size of the CM choke, determining the proper L<sub>k</sub> to eliminate the DM noise thoroughly is difficult. Therefore, a bulky CM choke is required for a larger L<sub>k</sub>. Typically, another DM choke is used for DM noise attenuation. Thus, the cost and size of the electromagnetic interference (EMI) filters for use with a conventional CM choke can increase. To solve these problems, we propose a CM choke with an asymmetrical winding. In contrast to the conventional CM choke with a symmetrical winding, the L<sub>m</sub> of the CM choke with an asymmetrical winding can suppress both CM and DM noises. Therefore, the proposed CM choke can effectively attenuate CM and DM noises with fewer and smaller turns. This method can be applied to all types of AC-to-DC power converters of sensor power modules that use two- or three-stage systems. To confirm the validity and superiority of the proposed CM choke, this paper compares the total, DM, and CM noise characteristics between conventional and proposed CM chokes. Finally, a practical approach to designing EMI filters and the design procedures are also addressed.
#EMI filter
#Conducted EMI
#Asymmetrical winding CM choke
#CM and DM noise attenuation
#Sensor power modules
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목차
- ABSTRACT
- 1. INTRODUCTION
- 2. CM AND DM NOISE MODELING OF THE PROPOSED CM CHOKE WITH AN ASYMMETRICAL WINDING
- 3. DESIGN CONSIDERATION OF THE PROPOSED CM CHOKE WITH AN ASYMMETRICAL WINDING
- 4. EXPERIMENTAL RESULTS AND DISCUSSION
- 5. CONCLUSIONS
- REFERENCES
참고문헌
참고문헌 신청최근 본 자료
UCI(KEPA) : I410-151-25-02-093777862
