Suppressing electromagnetic interference with chaos control: Methodologies and case study

A modulation technique based on mathematical chaos is introduced and investigated with respect to suppress electromagnetic inference (EMI) in power electronics converters with replacing or complementing traditional filtering and schielding technologies in mind. The technique allows for parameter modulation and for chaos-based pulse width modulation (PWM). The latter can be implemented both in analogue or digital ways. To facilitate industrial applications, a novel chaotic modulation interface circuit to serve as a plug-in component for commercial power supplies is designed. Its effectiveness is verified theoretically and experimentally.