Programmable Device Circuits and Systems

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A Comparative Study of PI and Fuzzy Based Controllers for DC-DC Converters


Affiliations
1 Department of Electronics and Communication Engineering, Amrita School of Engineering, Amrita Vishwa vidyapeetham University, Bangalore, India
2 Department of Electronics and Communication Engineering, Amrita School of Engineering, Amrita Vishwa Vidyapeetham University, Bangalore, India
3 Department of Electrical and Electronics Engineering, Amrita School of Engineering, Amrita Vishwa Vidyapeetham University, Bangalore, India
     

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Industrial, residential and aerospace environments widely use switching mode power supplies. Switching modepower supplies need to be of small size as well as highly efficient. Hence a high switching frequency is necessary for reducing the size of the converter. But as the switching frequency increases, switching loss will also increase. This will result in gradual decrease in the efficiency of the power supplied. This paper is an attempt to study the application of fuzzy based control for DC-DC converters operating at finite switching frequency. Conventional PI method currently used for buck boost converters is compared with the fuzzy based control. Simulation results are also presented. The simulations show that the fuzzy control method has better dynamic  performance.


Keywords

Buck Boost Converters, DC-DC Converters, Fuzzy Controller and Proportional Integral Controller-PI.
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  • A Comparative Study of PI and Fuzzy Based Controllers for DC-DC Converters

Abstract Views: 448  |  PDF Views: 1

Authors

K. Deepa
Department of Electronics and Communication Engineering, Amrita School of Engineering, Amrita Vishwa vidyapeetham University, Bangalore, India
R. Jeyanthi
Department of Electronics and Communication Engineering, Amrita School of Engineering, Amrita Vishwa Vidyapeetham University, Bangalore, India
K. S. Amitkumar
Department of Electrical and Electronics Engineering, Amrita School of Engineering, Amrita Vishwa Vidyapeetham University, Bangalore, India

Abstract


Industrial, residential and aerospace environments widely use switching mode power supplies. Switching modepower supplies need to be of small size as well as highly efficient. Hence a high switching frequency is necessary for reducing the size of the converter. But as the switching frequency increases, switching loss will also increase. This will result in gradual decrease in the efficiency of the power supplied. This paper is an attempt to study the application of fuzzy based control for DC-DC converters operating at finite switching frequency. Conventional PI method currently used for buck boost converters is compared with the fuzzy based control. Simulation results are also presented. The simulations show that the fuzzy control method has better dynamic  performance.


Keywords


Buck Boost Converters, DC-DC Converters, Fuzzy Controller and Proportional Integral Controller-PI.