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A low capacitance single-phase AC-DC converter with inherent power ripple decoupling

Gottardo, Davide; De Lillo, Liliana; Empringham, Lee; Costabeber, Alessando

Authors

Davide Gottardo

Liliana De Lillo eezld@exmail.nottingham.ac.uk

Lee Empringham lee.empringham@nottingham.ac.uk

Alessando Costabeber alessandro.costabeber@nottingham.ac.uk



Abstract

This paper proposes a new single-phase AC-DC conversion topology with inherent power ripple decoupling, based on the combination of a PWM H-bridge inverter, an AC side LC filter and a ZVS line commutated H-bridge. A capacitor on the AC side is used as power decoupling element. By appropriate selection of the capacitor voltage, the power ripple at twice the AC frequency can be cancelled from the DC side instantaneous power, achieving negligible DC voltage ripple using a smaller total capacitance compared to traditional solutions.
Recently, several solutions using the concept of Ripple-Port have been proposed that reduce the overall capacitance. However, they usually need at least a dedicated PWM half-bridge leg, adding switching loss, and a separate LC tank. Instead, the proposed topology integrates the ripple compensation in the AC/DC conversion stage, exploiting the AC filter and minimising additional loss thanks to the ZVS of the additional H-bridge.
The concept of the steady state operation of the proposed converter is described analytically and validated in simulation using MATLAB Simulink and PLECS.
This work is being developed at University of Nottingham within the framework of project SENSIBLE.

Publication Date Oct 27, 2016
Peer Reviewed Peer Reviewed
APA6 Citation Gottardo, D., De Lillo, L., Empringham, L., & Costabeber, A. (2016). A low capacitance single-phase AC-DC converter with inherent power ripple decoupling
Keywords Capacitors, Bridge circuits, Pulse width modulation, Voltage control, Frequency conversion
Publisher URL http://ieeexplore.ieee.org/document/7793634/
Related Public URLs http://www.iecon2016.org/
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf
Additional Information © 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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