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IJSTR >> Volume 6 - Issue 4, April 2017 Edition

International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616

Digital Control Of A Buck Converter Using An 8 Bit STM Microcontroller

[Full Text]



Muhammad Umar Abbasi



buck convertor; average circuit modeling; state space modeling; digital control; 8 bit STM controller; PID Controller; MATLAB



The aim of this paper is to describe the modeling and digital control of a buck converter using an 8 bit STM microcontroller. The modeling procedure including the inductor dc resistance and capacitor esr using both the circuit averaging as well as the state space averaging method is described in a simple manner. The resulting small signal control to output transfer function is used to select a suitable PID controller in order to obtain satisfactory control loop performance and also maintain ease of implementation. Practical issues involved in implementing digital control using 8 bit microcontrollers are discussed. MATLB Simulations and practical implementation results on a STM8S controller are presented to validate the modeling and controller design approach. The perspective applications of this controller are discussed.



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