Reduction of Output Voltage Ripples in Frequency Modulated Power Converter

摘要

Nowadays switch-mode power converters (SMPC) are essential to electric power conversion with high efficiency (linear regulators used widely in the past had very low efficiency and therefore nowadays they are in rather limited use) [1-3]. SMPC are widely used in power supplies of various electronic devices, active power factor correctors, etc. Despite their advantages (mainly high efficiency and specific power) [3, 4], they have also their drawbacks: high electromagnetic interference (EMI) both conducted and radiated [2, 5]. Filters, shielding, grounding etc are classical ways to mitigate EMI. Another successful method to reduce EMI is spread spectrum which is usually based on the use of switching frequency modulation (FM) [1, 2, 6].