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2008•IEEE Transactions on Power ElectronicsRequires access

Design Method for System Loop Compensation based on the Si8250 Digital Controller

Yuanqiang Luo

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Abstract

This paper describes direct digital design method for digital power supply based on Si8250 controller.A small signal model in z domain is built for power stage and digital control stage of half-bridge converter.Then Venable Ⅲcompensation is adopted for digital PID compesator and some mathematical softwares,such as Mathcad and Matlab,take advantages in operation and analysis for system open-loop stability.Good dynamic responding and stability for system loop is proved at the end of experiment.

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What this paper is about

This paper describes direct digital design method for digital power supply based on Si8250 controller.A small signal model in z domain is built for power stage and digital control stage of half-bridge converter.Then Venable Ⅲcompensation is adopted for digital PID compesator and some mathematical softwares,such as Mathcad and Matlab,take advantages in operation and analysis for system open-loop stability.Good dynamic responding and stability for system loop is proved at the end of experiment.

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Available abstract

This paper describes direct digital design method for digital power supply based on Si8250 controller.A small signal model in z domain is built for power stage and digital control stage of half-bridge converter.Then Venable Ⅲcompensation is adopted for digital PID compesator and some mathematical softwares,such as Mathcad and Matlab,take advantages in operation and analysis for system open-loop stability.Good dynamic responding and stability for system loop is proved at the end of experiment.

Key concepts: Digital control, Control theory (sociology), Compensation (psychology), Open-loop controller, MATLAB, PID controller, Controller (irrigation), Control engineering

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