The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 22, 2012
Filed:
Mar. 29, 2010
Dehong Xu, Hangzhou, CN;
Zhiwei Wen, Hangzhou, CN;
Xiaofeng Wu, Hangzhou, CN;
Yasuhiro Okuma, Tokyo, JP;
Kazuaki Mino, Tokyo, JP;
Dehong Xu, Hangzhou, CN;
Zhiwei Wen, Hangzhou, CN;
Xiaofeng Wu, Hangzhou, CN;
Yasuhiro Okuma, Tokyo, JP;
Kazuaki Mino, Tokyo, JP;
Fuji Electric Co., Ltd., Kawasaki-Shi, JP;
Abstract
An entirely integrated EMI filter is based on a flexible multi-layer strip material. An EE or EI core comprises two side pillars and one middle pillar and forms a closed magnetic circuit. The middle pillar has an air gap. A first winding and a second winding respectively are wound around the two side pillars in a same winding direction. The middle pillar is wound with a third winding and a fourth winding, or with only a fifth winding. Passive components (e.g., all passive components) of the EMI filter are integrated into one core so that in its differential mode, insertion loss is significantly reduced, the size and volume are reduced, and the distribution constant of the EMI filter has less impact on the filter's performance.