Systematic selection of analogue redesign method for forward-type digital power converters
| Autor: | Ali Shirsavar, Ben Potter, Victor M. Becerra, Kim Cave-Ayland |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Engineering
Buck converter business.industry Crossover Phase margin Converters switched mode power supplies frequency domain analysis Civil Engineering digital control discrete transforms power electronics Control theory Frequency domain Power electronics DC-DC power conversion Electronic engineering Digital control Electrical and Electronic Engineering business |
| Zdroj: | Cave-Ayland, K, Becerra, V, Potter, B & Shirsavar, A 2014, ' Systematic selection of analogue redesign method for forward-type digital power converters ', International Journal of Electronics, vol. 101, no. 5, pp. 667-680 . https://doi.org/10.1080/00207217.2013.794486 |
| ISSN: | 1362-3060 0020-7217 |
| DOI: | 10.1080/00207217.2013.794486 |
| Popis: | This article proposes a systematic approach to determine the most suitable analogue redesign method to be used for forward-type converters under digital voltage mode control. The focus of the method is to achieve the highest phase margin at the particular switching and crossover frequencies chosen by the designer. It is shown that at high crossover frequencies with respect to switching frequency, controllers designed using backward integration have the largest phase margin; whereas at low crossover frequencies with respect to switching frequency, controllers designed using bilinear integration with pre-warping have the largest phase margins. An algorithm has been developed to determine the frequency of the crossing point where the recommended discretisation method changes. An accurate model of the power stage is used for simulation and experimental results from a Buck converter are collected. The performance of the digital controllers is compared to that of the equivalent analogue controller both in simulation and experiment. Excellent closeness between the simulation and experimental results is presented. This work provides a concrete example to allow academics and engineers to systematically choose a discretisation method. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|