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A Caltech Library Repository Feedhttp://www.rssboard.org/rss-specificationpython-feedgenenTue, 16 Apr 2024 16:00:43 +0000Switching Flow-Graph nonlinear modeling technique
https://resolver.caltech.edu/CaltechAUTHORS:SMEieeetpe94
Authors: {'items': [{'id': 'Smedley-K-M', 'name': {'family': 'Smedley', 'given': 'Keyue'}}, {'id': 'Ćuk-S', 'name': {'family': 'Ćuk', 'given': 'Slobodan'}}]}
Year: 1994
DOI: 10.1109/63.318899
A unified graphical modeling technique, "Switching Flow-Graph" is developed to study the nonlinear dynamic behavior of pulse-width-modulated (PWM) switching converters. Switching converters are variable structure systems with linear subsystems. Each subsystem can be represented by a flow-graph. The Switching Flow-Graph is obtained by combining the flowgraphs of the subsystems through the use of switching branches. The Switching Flow-Graph model is easy to derive, and it provides a visual representation of a switching converter system. Experiments demonstrate that the Switching Flow-Graph model has very good accuracy.https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/z08at-0g178One-cycle control of switching converters
https://resolver.caltech.edu/CaltechAUTHORS:SMEieeetpe95a
Authors: {'items': [{'id': 'Smedley-K-M', 'name': {'family': 'Smedley', 'given': 'Keyue M.'}}, {'id': 'Ćuk-S', 'name': {'family': 'Ćuk', 'given': 'Slobodan'}}]}
Year: 1995
DOI: 10.1109/63.471281
A new large-signal nonlinear control technique is proposed to control the duty-ratio d of a switch such that in each cycle the average value of a switched variable of the switching converter is exactly equal to or proportional to the control reference in the steady-state or in a transient. One-cycle control rejects power source perturbations in one switching cycle; the average value of the switched variable follows the dynamic reference in one switching cycle; and the controller corrects switching errors in one switching cycle. There is no steady-state error nor dynamic error between the control reference and the average value of the switched variable. Experiments with a constant frequency buck converter have demonstrated the robustness of the control method and verified the theoretical predictions. This new control method is very general and applicable to all types of pulse-width-modulated, resonant-based, or soft-switched switching converters for either voltage or current control in continuous or discontinuous conduction mode. Furthermore, it can be used to control any physical variable or abstract signal that is in the form of a switched variable or can be converted to the form of a switched variable.https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/85whg-c0t26Dynamics of one-cycle controlled Ćuk converters
https://resolver.caltech.edu/CaltechAUTHORS:SMEieeetpe95b
Authors: {'items': [{'id': 'Smedley-K-M', 'name': {'family': 'Smedley', 'given': 'Keyue M.'}}, {'id': 'Ćuk-S', 'name': {'family': 'Ćuk', 'given': 'Slobodan'}}]}
Year: 1995
DOI: 10.1109/63.471282
One-cycle control is a nonlinear control method. The flow-graph modeling technique is employed to study the large-signal and small-signal dynamic behavior of one-cycle controlled switching converters. Systematic design method for one-cycle control systems is provided with the Ćuk converter as an example. Physical insight is given which explains how one-cycle control achieves instant control without infinite loop gain. Experimental results demonstrate that a Ćuk converter with one-cycle control reflects the power source perturbation in one-cycle and the average of the diode voltage follows the control reference in one cycle.https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/x03jk-f8032