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A unified analysis of PWM converters in discontinuous modes

Maksimović, Dragan and Ćuk, Slobodan (1991) A unified analysis of PWM converters in discontinuous modes. IEEE Transactions on Power Electronics, 6 (3). pp. 476-490. ISSN 0885-8993. doi:10.1109/63.85890.

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Three discontinuous operating modes of PWM (pulsewidth modulated) converters are considered: the discontinuous inductor current mode (DICM), the discontinuous capacitor voltage mode (DCVM), and a previously unidentified mode called the discontinuous quasi-resonant mode (DQRM). DC and small-signal AC analyses are applicable to all basic PWM converter topologies. Any particular topology is taken into account via its DC conversion ratio in the continuous conduction mode. The small-signal model is of the same order as the state-space averaged model for the continuous mode, and it offers improved predictions of the low-frequency dynamics of PWM converters in the discontinuous modes. It is shown that converters in discontinuous modes exhibit lossless damping similar to the effect of the current-mode programming.

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Additional Information:© Copyright 1991 IEEE. Reprinted with permission. Manuscript received September 20. 1989. This paper was presented at the 1989 International Power Conversion and Intelligent Motion Conference, Munich, West Germany. June 6-9. This work was conducted under the Power Electronics Program supported by grants from Boeing Electronics Company, GTE Communication Systems Corp., Rockwell, Inc., and EG&G Almond Instruments, Inc. The assistance is gratefully acknowledged of Ljubiša Stevanović, a graduate student at California Institute of Technology and a member of the Power Electronics Group, for the help in constructing the experimental circuits and producing the experimental results in Section IV.
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Deposited On:20 Dec 2006
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