The double discontinuous mode operation of a converter: a method for soft switching

• Published in: IEEE transactions on power electronics Vol. 19; no. 2; pp. 453 - 460
• Main Authors: Sadarnac, D., Abida, W., Karimi, C.
• Format: Journal Article
• Language: English
• Published: New York IEEE 01-03-2004; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Circuits; Converters; Diodes; Distributed decision making; Electric potential; Electronic switching systems; Electronics; Filters; Frequency; Mathematical model; Mathematical models; Power supplies; Power supply; Switches; Switching; Switching converters; Transformers; Voltage; Zero voltage switching
• ISSN: 0885-8993; 1941-0107
• DOI: 10.1109/TPEL.2003.823171

This paper describes a way of ensuring soft switching in a converter without using additional components. This method is called double discontinuous mode (DDM). In particular, it permits any free wheeling diode to switch off at zero current, and for transistors to switch on at zero current and to switch off at zero voltage. The method illustrated here refers to a buck, but this concept may be applied to any type of converter, with or without transformer. Various mathematical models of this method are developed, and its characteristics and fields of application highlighted in this paper.