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http://dx.doi.org/10.5515/KJKIEES.2017.28.4.298

Reduction of Conducted Emission in Interleaved RPWM Buck Converter  

Lee, Seunghyun (Departmemt of Electrical and Computer Engineering, Sungkyunkwan University)
Lee, Keunbong (SK Hynix)
Nah, Wansoo (Departmemt of Electrical and Computer Engineering, Sungkyunkwan University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.28, no.4, 2017 , pp. 298-308 More about this Journal
Abstract
This paper presents a Interleaved Buck Converter(IBC) system with Random PWM to reduce electromagnetic noise by harmonics. Swithced mode power supply generally controlled by high switching frequency have a electromagnetic interference(EMI) issue due to the high-voltage/high-current switching to regulate the voltage in buck converter. To solve the problem. we present a novel IBC system with PRBS. IBC system has two active switches with 180 phase difference that controll the cicuit with two PWM signal. IBC system may be disadventageous for the cost due to the addtion of one set of switch, but it has adventages of power distribution, current ripple cancellation, fast transient response, and passive component size reduction. To verify the validity of study, simulation program has been bulit using PSIM and the experimental results of IBC system using RPWM was compared with the conventinal PWM and randomized PWM.
Keywords
DC/DC Converter; Interleaved Buck Converter(IBC); Random PWM(RPWM); PRBS; Harmonics;
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