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      Comparison of digital PWM control strategies for high-power interleaved DC–DC converters

      , 1 , 1 , 2 , 1 , 1 , 1

      IET Power Electronics

      The Institution of Engineering and Technology

      DC-DC power convertors, electric current control, microcontrollers, PWM power convertors, digital control, power engineering computing, control engineering computing, digital PWM control strategies, digital pulse-width-modulation control strategies, high-power dual-interleaved DC-DC converters, current sharing, digital peak current control, multisample averaged current, enhanced single-sample averaged current control, TMS320F28377D, stability requirements, silicon carbide DC-DC converter, enhanced single-sample method, multisampled technique, dynamic response, duty ratios

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          Abstract

          Three pulse-width-modulation (PWM) digital control approaches are evaluated to provide the current sharing between phases in high-power dual-interleaved DC–DC converters. The implementation of a digital peak current, multi-sample averaged current and an enhanced single-sample averaged current control in a TMS320F28377D is described. A summary of stability requirements is provided for designing the controllers and experimental results from a 60 kW, 75 kHz silicon carbide DC–DC converter are used to evaluate the steady-state and dynamic performance of the three control methods. Overall the best performance in terms of tracking and speed of response was achieved by the enhanced single-sample method. The multi-sampled technique provided the highest tracking accuracy, but at the expense of the slowest dynamic response. The fastest dynamic response was achieved by the digital peak current control, but this method is limited by poor noise immunity and instability for duty ratios in the region of 0.5.

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          Most cited references 15

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          Quantization resolution and limit cycling in digitally controlled PWM converters

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            Predictive digital current programmed control

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              Modeling of Quantization Effects in Digitally Controlled DC–DC Converters

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                Author and article information

                Affiliations
                [1 ] Power Conversion Group, School of Electrical and Electronic Engineering, University of Manchester , Manchester, UK
                [2 ] Department of Electrical and Computer Engineering, Texas A&M University at Qatar , Education City, Doha, Qatar
                Contributors
                Journal
                IET-PEL
                IET Power Electronics
                IET Power Electron.
                The Institution of Engineering and Technology
                1755-4535
                1755-4543
                4 October 2017
                30 November 2017
                20 February 2018
                : 11
                : 2
                : 391-398
                IET-PEL.2016.0886 PEL.SI.2016.0886.R1
                10.1049/iet-pel.2016.0886

                This is an open access article published by the IET under the Creative Commons Attribution License ( http://creativecommons.org/licenses/by/3.0/)

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                Funding
                Funded by: Engineering and Physical Sciences Research Council
                Award ID: EP/K035096/1
                Categories
                Research Article

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