Three-Phase EMI Noise Separator

Common mode (CM) and differential mode (DM) components of multi-phase conducted electromagnetic interference (EMI) noise emanating from electronic circuits such as power converters/inverters are separated by respective coupled inductors connected to each phase of three or more phases and which are coupled to each other differently for CM and DM noise of the respective phases. the inductors of the DM separation unit are coupled such that a substantially ideal zero impedance is presented to DM noise which a high impedance is presented to CM noise. Conversely, the inductors of the CM separation unit are coupled such that a substantially ideal zero impedance is presented to CM noise while a high impedance is presented to DM noise.

Patent Information:

App Type	Country	Serial No.	Patent No.	File Date	Issued Date	Patent Status
US Utility	*United States	13/071,647	8,698,579	3/25/2011	4/15/2014	Abandoned

Category(s):

Electrical

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For Information, Contact:

Li Chen

Licensing Associate

Virginia Tech Intellectual Properties, Inc.

(540) 443-9217

lchen@vtip.org

Inventors:

Shuo Wang

Fred Lee

Keywords:

Electronics