NDLI: Digital Controller Design for Low Source Current Ripple Fifth-Order Boost Converter

Content Provider	IEEE Xplore Digital Library
Author	Veerachary, M.
Copyright Year	1982
Abstract	In this paper, a new fifth-order boost point of load converter is proposed, and then, a digital controller is designed using a Tchebyshev polynomial approach. The proposed converter has a reduced source ripple current together with a better boosting capability at lower duty ratios. Discrete-time models of the converter are formulated and then used in the identification of the direct digital controller stabilizing region. These discrete-time transfer functions are transformed into a Tchebyshev representation, consisting of converter control-to-output and controller transfer functions, which are then used to ascertain the existence of a stabilizing controller, and if stabilization is possible, then the entire set of gains is constructively determined. Using this method, the controller gain range is obtained as a set of inequalities in two variables for a fixed third variable. By sweeping the third variable over its entire range, the complete stabilizing sets are obtained. Within these ranges, the optimal digital controller parameters are obtained through a constrained optimization problem using a genetic algorithm. An integral time absolute error performance index is used in the optimization. A 30-W, 12- to 28-V, and 100-kHz laboratory prototype closed-loop converter has been developed and then tested, both as a simulation and experimentally, for its voltage regulation capability against source and load perturbations. Both the simulated and experimental results confirm the effectiveness of the proposed design.
Sponsorship	IEEE Industrial Electronics Society
Starting Page	270
Ending Page	280
Page Count	11
File Size	1669034
File Format	PDF
ISSN	02780046
Volume Number	61
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Polynomials Mathematical model Switches Stress Transfer functions Topology Capacitors Tchebyshev polynomial DC–DC converter digital controller discrete-time model fifth-order boost converter integral time absolute error (ITAE) integral of time multiplied by the squared error (ITSE) point of load converter (POLC) ripple current stabilizing region
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Electrical and Electronic Engineering Computer Science Applications

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