Three-Phase EMI Noise Separator

Description:
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:
Title App Type Country Serial No. Patent No. File Date Issued Date Expire Date
Three-Phase EMI Noise Separator US Utility *United States 13/071,647 8,698,579 3/25/2011 4/15/2014 4/13/2032
Category(s):
Electrical
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
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