Smedley, Keyue Ma (1991) Control art of switching converters. Dissertation (Ph.D.), California Institute of Technology. resolver.caltech.edu/CaltechETD:etd-06062005-152649
Switching Flow-Graph Model:
The Switching Flow-Graph is really a unified graphical type of large-signal, small-signal and steady-condition behavior of pulse-width-modulated (PWM) switching converters. Switching branches are introduced in to the flow-graph to represent the switches from the PWM switching converters. The Switching Flow-Graph model is simple to derive, and it possesses a visual physical knowledge of switching ripper tools systems. The little-signal Switching Flow-Graph generates analytical transfer functions and also the large-signal Switching Flow-Graph works with the TUTSIM simulation program. The Switching Flow-Graphs of PWM switching converters reveal a normal pattern, plus they predict right-half-plane (RHP) zeros, brought on by the imbalanced results of the job-ratio control signal around the creation of the switching converters. Criteria are located for the style of damping circuits that can handle eliminating RHP zeros. General models are derived for current-mode controlled switching converters. Additionally, the big-signal model and also the small-signal model are verified by experiments.
One-Cycle Control Technique:
The Main One-Cycle Control strategy is created to manage the job-ratio d from the switch instantly so that in every cycle the typical from the chopped waveform in the switch output is precisely comparable to the control reference. Implementation circuits are located for any kind of switch, constant frequency, constant ON-time, constant OFF-time, and variable.
One-Cycle Control fully rejects the input signal, and linearly all passes the control signal. This method turns a nonlinear switch right into a straight line one. Experiments were conducted while using One-Cycle Control technique around the buck ripper tools and also the Cuk ripper tools. One-Cycle Control was discovered to reject input perturbations and input filter dynamics. The diode current of 1-Cycle Controlled converters follows the control reference immediately in a single cycle. One-Cycle Control uses the pulsed and nonlinear nature of switching converters to attain immediate charge of the typical worth of the diode current. This method is appropriate for big-signal charge of PWM switching converters and quasi-resonant converters.
Thesis (Dissertation (Ph.D.))