Multi-phase EMI noise separator

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United States of America Patent

PATENT NO 8698579
SERIAL NO

13071647

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Abstract

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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 while 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.

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Patent Owner(s)

  • VIRGINIA POLYTECHNIC INSTITUTE AND STATE UNIVERSITY

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Lee, Fred C Blacksburg, US 124 4621
Wang, Shuo San Antonio, US 171 1084

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