EMI reduction of power supplies by Bi-Frequency modulation
- 17 December 2002
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- p. 601-607 vol.2
- https://doi.org/10.1109/apec.1994.316343
Abstract
In this paper, a new control (modulation) technique, called Bi-Frequency control, is proposed. By operating the converters at two fixed switching frequencies with a modulation frequency to adjust the duration ratio, the emission spectrum of the control signal is spread and the spectral power level is reduced. The spectral analysis of the Bi-Frequency control signal is given, and the spectral comparison between PWM and Bi-Frequency control is presented. A Bi-Frequency controlled buck ZVS converter is breadboarded to confirm the operation of the Bi-Frequency control.<>Keywords
This publication has 3 references indexed in Scilit:
- Random-switching control in DC-to-DC convertersPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2003
- Reduction of power supply EMI emission by switching frequency modulationPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- Comparison of EMI performance of PWM and resonant power convertersPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002