The IUP Journal of Electrical and Electronics Engineering
Simulation and Experimental Validation of Intelligent Controllers for Negative Output Triple Lift-Luo Converter

Article Details
Pub. Date : Jan, 2019
Product Name : The IUP Journal of Electrical and Electronics Engineering
Product Type : Article
Product Code : IJEEE41901
Author Name : N Dhanasekar, C R Balamurugan and S Soundarya
Availability : YES
Subject/Domain : Management
Download Format : PDF Format
No. of Pages : 16

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Abstract

Triple-Lift Luo circuit is derived from elementary Luo converter by adding the lift circuit three times. Negative Output Triple-Lift Luo Converter (NOTLLC) performs the conversion of positive input to negative output DC-DC voltage with high power density, high efficiency and cheap topology in simple structure. Due to time variation and switching nature of the Luo converters, their dynamic behavior becomes highly nonlinear. The classical control methods employed to design the controllers for Luo converters depend on the operating point so that it is very difficult to select control parameters because of time varying loads and variable supply voltages. Conventional controllers require a good knowledge of the system and accurate tuning in order to obtain the desired performances. Hence, in this paper, intelligent controllers are designed and hardware implementation has been carried out using TMS320C242 Digital Signal Processor (DSP) for NOTLLC. The experimental results are analyzed under supply and load disturbances.


Description

Voltage lift technique is a popular method widely used in computer hardware and industrial applications such as car auxiliary power supplies, servomotor drives and medical equipment. Because the output voltage and power transfer efficiency of all DC-DC converters are restricted, DC-DC converters accept DC input voltage at one level, and produce DC output voltage at another level (Achiammal and Kayalvizhi, 2015). The usual requirement of a control system for the converter is to maintain the output voltage constant irrespective of variations in the DC source voltage and the load resistance. Traditional controllers of DC-DC converters are based on small signal model. Frequency domain-based controllers depend on the system operating points, characteristics of parasitic elements and load and line changes. Since the intelligent controllers work very well for nonlinear, time variant and complex systems, this paper presents PI, fuzzy and neuro control of a Triple- Lift Luo Converter for controlling the DC output voltage. Hardware implementation of these controllers for Triple-Lift Luo Converter (TLLC) has been developed using TMS320C242 Digital Signal Processor (DSP).


Keywords

Fuzzy Logic Controller (FLC), Neuro controller, Negative Output Triple-Lift Luo Converter (NOTLLC), Digital Signal Processor (DSP)

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