Title :
Critical core parameters in the design of common mode suppression chokes
Author :
Hemphill, E. ; Wallertz, B.
Author_Institution :
Schaffner Elektronik AG, Luterbach, Switzerland
Abstract :
The effective suppression of common mode chokes does not meet up to their expectations in a great number of cases. The only explanation given in standard texts is saturation. This saturation phenomenon is studied in this paper, in particular saturation due to excessive EMI current. It is shown that a relationship exists between the H-field induced in the core and the suppression effect of the choke. By estimating the suppression required in a particular equipment, it is shown that it is possible to reach optimum core parameters
Keywords :
design engineering; electromagnetic fields; electromagnetic interference; inductors; magnetic cores; optimisation; H-field; common mode suppression chokes; critical core design parameters; excessive EMI current; optimum core parameters; saturation phenomenon; suppression effect; Cable shielding; Capacitance; Electromagnetic interference; Filters; Impedance; Inductors; Magnetic cores; Magnetic field measurement; Pulse width modulation inverters; Testing;
Conference_Titel :
Electromagnetic Interference and Compatibility, 1995., International Conference on
Conference_Location :
Madras
Print_ISBN :
0-7803-3229-6
DOI :
10.1109/ICEMIC.1995.501606
