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General properties and synthesis of PWM dc-to-dc converters

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GENERAL PROPERTIES AND SYNTHESIS OF PWM DC-to-DC CONVERTERS

A method for systematic synthesis of quasi-resonant (QR) topologies by addition of resonant elements to a parent pulse-width modulation (PWM) converter network is proposed. It is found that there are six QR classes with two resonant elements, including two novel classes. More complex QR converters can be generated by a recursive application of the synthesis method. Topological definitions of all known and novel QR classes follow directly from the synthesis method and topological properties of PWM parents. The synthesis of QR converters is augmented by a study of possible switch realizations and operating modes. In particular, it is demonstrated that a controllable rectifier can be used to accomplish the constant-frequency control in all QR classes. Links between the QR converters and the underlying PWM networks are extended to general DC and small-signal AC models in which the model of the PWM parent is explicitly exposed. Results of steady-state analyses of selected QR classes and operating modes include boundaries of operating regions, DC characteristics, a comparison of switching transitions and switch stresses, and a discussion of relevant design trade-offs.

(1989) Synthesis of PWM and quasi-resonant DC-to-DC power converters ..

Geneml properties that internlate the network complen.&, a#aan-able amversion ration and nuitch &eraer are derived for P WM DC-to-DC converters. l?w emerpkg qnfhedr pmcedure guananta8 that complete clamen of converters that A' & a set of prescribed rpccificcr-tions am genemted The input rpcci)kationr include the demred DC convermon mtio, non-puldthg terminal cumnta, posrible coupling of inductors, the dlowed number of nuitches and, in par(icular, the number of active tmnaidor switches. As a result, a number of novel P WM topologies are uncovend 1

“General Properties and Synthesis of PWM Dc-Dc Converters ..

Abstract-A method for systematic synthesis of quasi-resonant (QR) topologies by addition of resonant elements to a parent PWM converter network is proposed. It is found that there are six QR classes with two resonant elements, including two novel classes. More complex QR con-verters can be generated by a recursive application of the synthesis method. Topological definitions of all known and novel QR classes fol-low directly from the synthesis method and topological properties of PWM parents. The synthesis of QR converters is augmented by a study of possible switch realizations and operating modes. In particular, it is demonstrated that a controllable rectifier can be used to accomplish the constant-frequency control in all QR classes. Links between the QR converters and the underlying PWM networks are extended to general dc and small-signal ac models, in which the model of the PWM parent is explicitly exposed. Results of steady-state analyses of selected QR classes and operating modes include boundaries of operating regions, dc characteristics, a comparison of switching transitions and switch stresses, and a discussion of relevant design trade-offs. I.

“General properties and synthesis of PWM DC-to-DC converters

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  • Synthesis of pwm dc-to-dc power converters

    From defining assumptions, several general properties of PWM converter networks are derived

  • A novel systematical synthesis method of PWM dc-to'dc converters is.

    14/12/2017 · Synthesis of PWM and quasi-resonant DC-to-DC ..

  • several general properties of PWM converter ..

    Synthesis of PWM and quasi-resonant ..

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