Implementation of Soft-Switching Auxiliary Current Control for Faster Load Transient Response

Kim, Dongwook; Baek, Jongun; Lee, Jisu; Shin, Joon-Ho

doi:10.1109/access.2021.3049139

Cited by 7 publications

(1 citation statement)

References 27 publications

(55 reference statements)

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“…This controller enjoys the advantages of more freedom in placing the poles and zeros and achieve better stability margin compared to conventional PI controller. Design of k-factor based type III controllers with optimum performance and faster transient response have been presented in [16][17][18].Method of Pole placement for controller design using all accessible state variables are used in [19].PI controller along with sigma delta modulator has been implemented for the converter presented in [20] [24].Restrictions of dominant pole placement (DPP) method of controller is analysed in [21].The control scheme adopted in [23] shapes the auxiliary inductor current for the improvement of dynamic response. Soft-switching quasi-resonant converters (QRC) use active and/or passive resonant networks, in addition to basic components of normal pulse-width-modulation (PWM) converters.…”

Section: Introductionmentioning

confidence: 99%

Novel Zero-Voltage Zero-Current Transition Buck Converter With Minimal Impact of Active Auxiliary Cell on Overall Dynamics

Pal¹,

Saha

2023

IEEE Access

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This paper presents a novel zero-voltage zero-current transition DC/DC buck converter, which uses an active auxiliary resonant network to achieve soft switching operation of semiconductor switches and soft-recovery of power diodes over wide output power range and offers high efficiency. The auxiliary cell in the proposed converter does not cause any additional current stress on the semiconductor switches and has minimal impact on overall dynamics of the converter. Steady-state performance of the converter has been presented with detailed theoretical analysis of all operating modes. The design of auxiliary cell components and development of small signal model of the converter have been carried out from the mathematical equations depicting its dynamic behaviour. A closed loop voltage mode controller with a type III compensator has been developed for the converter to achieve the desired transient response under the influence of external disturbances. Power loss analysis and superiority of the proposed converter over other conventional configurations are also presented here. Finally, soft-switching behaviour and step-input transient response of the converter are verified by hardware experimentation on a150W, 100 kHz prototype model. The experimental measurements have successfully validated the theoretically predicted behaviour of the converter.INDEX TERMS Buck converter, Soft-switching, Zero current switching (ZCS), Zero voltage switching (ZVS)

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