Abstract
KY boost converter is a recently invented in DC-DC converter topology by K. I. Hwu and Y. T. Yau. This converter operates in continuous conduction mode with low output voltage ripple in the order of few mV, fast transient response and settling time yielding larger voltage conversion ratio. In this work, Neuro Fuzzy control technique is proposed to reduce the output voltage ripple and to achieve fast settling time. The digitally simulated results are obtained using MATLAB/Simulink with reduced voltage ripple in the order of µV along with fast settling time. The proposed controller is devised with a microcontroller which is embedded with Neuro Fuzzy algorithm to regulate the output voltage of the converter and the experimental result has validated the simulation result. DOI: http://dx.doi.org/10.5755/j01.eee.19.8.2351
Highlights
Advent of communication and computing gadgets such as Personal Digital Assistant (PDA), MPEG etc., necessitate the boosted output voltage for specific input voltage
The Adaptive Neuro Fuzzy Inference System (ANFIS) controller implemented in this article is of the model described as above whose fuzzifier section comprise the input signals error (e) and change in error signal whose membership functions are selected as Gaussian membership function and are classified into seven functions namely Negative Big (NB); Negative Medium (NM); Negative Small (NS); Zero (ZE); Positive Small (PS); Positive Medium (PM) and Positive Big (PB)
It is evident that the overshoot in PID output is reduced in Neuro Fuzzy controller output and the settling time of the output voltage is reduced to greater extent by the proposed controller and the measured settling time is 15 ms
Summary
Advent of communication and computing gadgets such as Personal Digital Assistant (PDA), MPEG etc., necessitate the boosted output voltage for specific input voltage. For such applications, the designer has to be precise in considering the voltage ripple content, settling time and load transient response of the converter. Conventional nonisolated DC - DC boosting converters tend to cause large output voltage ripples. This can be overcome by using Equivalent Series Resistant (ESR) Capacitor [1] or by adding an inductance – capacitance (LC) filter [2]. The hardware implementation of the proposed system for the KY boost converter and the experimental results are discussed in following sections
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