Measuring and limiting EMI with a selectable mode reflection net

Details Measuring and limiting EMI with a selectable mode reflection net Measuring and limiting EMI with a selectable mode reflection net

1989-09-22

1991-02-26

Snow, Walter E.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Parameter related to the reproduction or fidelity of a...

324625, G01R 2700

Patent

active

049964887

ABSTRACT:
Selectable mode rejection network (SMRN) for electromagnetic interference (EMI) excludes common mode (CM) and, alternatively, differential mode (DM) conducted emissions (CE) from entering power transmission lines from electrical equipment powered from such lines and producing such unwanted electrical noise. Phase-switching the SMRN determines whether CM or DM is so excluded, thereby facilitating measurement of the unexcluded type of CE. So used in measuring EMI, such SMRN enables improved filter design for the respective types of CE and composite filters for limiting both CM and DM CE.

REFERENCES:
patent: 4263549 (1981-04-01), Toppeto
patent: 4849685 (1984-07-01), Nave
Schnieder, "Noise Source . . . Filter Design", 1983, Proceeding of Powercon 10, pp. 167-175.
Nave, "Predection of Conducted Emissions . . . ", 1986, IEEE Intl. Symposium on EMC.
Toppeto, "Test Method . . . ", 1979, EMC Symposium Rollerdam.

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