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A Non-Insulated Step-Up/Down DC-DC Converter With Wide Range Conversion

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In this paper an approach of a step-up/down dc-dc converter with wide range conversion called Boost2-Buck is presented. The proposed converter presents nonpulsating input and output current. It has operations equivalent to a cascade converter consisting of two boost converter and one buck converter, but with the advantage of using single active switch. Mathematical analysis and experimental results are presented for converter operating with output power of 20W.

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A Non-Insulated Step-Up/Down DC-DC Converter With Wide Range Conversion

  1. 1. ELECTRICAL PROJECTS USING MATLAB/SIMULINK Gmail: asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in 0-9347143789/9949240245 A Non-Insulated Step-Up/Down DC-DC Converter With Wide Range Conversion For Simulation Results of the project Contact Us Gmail: asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in 0-9347143789/9949240245 ABSTRACT: In this paper an approach of a step-up/down dc-dc converter with wide range conversion called Boost 2 -Buck is presented. The proposed converter presents nonpulsating input and output current. It has operations equivalent to a cascade converter consisting of two boost converter and one buck converter, but with the advantage of using single active switch. Mathematical analysis and experimental results are presented for converter operating with output power of 20W. SOFTWARE: MATLAB/SIMULINK CIRCUIT DIAGRAM: Figure 1. Schematic boost 2 -buck.
  2. 2. ELECTRICAL PROJECTS USING MATLAB/SIMULINK Gmail: asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in 0-9347143789/9949240245 SIMULATION RESULTS: Figure 2. Waveforms for Vi=180V (Bottom: Voltage on capacitor Figure 3. Waveforms for Vi=180V (Bottom: Voltage on capacitor For Simulation Results of the project Contact Us Gmail: asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in 0-9347143789/9949240245 C 1 – 100V/Div; Top: Voltage V DS on Switch S – 100V/Div). C 2 – 100V/Div; Top: Voltage V DS on Switch S – 100V/Div). Figure 4. Waveforms for Vi=180V (Bottom: Voltage on capacitor Figure 5. Efficiency of the boost 2 -buck Converter C 3 – 50V/Div; Top: Voltage V DS on Switch S – 100V/Div).
  3. 3. ELECTRICAL PROJECTS USING MATLAB/SIMULINK Gmail: asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in 0-9347143789/9949240245 For Simulation Results of the project Contact Us Gmail: asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in 0-9347143789/9949240245 CONCLUSION: The boost 2 -buck converter presented in this paper provides a wide range of dc conversion when compared with the conventional non-insulated dc-dc converters. This topology presents non pulsating input and output current. It has operations equivalent to a cascade converter consisting of two boost converter and one buck converter, but with the advantage of using single active switch. Consequently, when compared with a converter cascade, it is cheaper, less bulky and uses circuit control simpler. Through the experimental results is possible to prove the performance of the converter as well as the theoretical analysis presented. REFERENCES: [1] J. A. Morales-Saldaña, J. Leyva-Ramos, E. E. Carbajal-Gutiérrez, M. G. Ortiz-Lopez, “Average Current-Mode Control Scheme for a Quadratic Buck Converter with a Single Switch,” IEEE Trans. on Power Electronics, vol. 23, pp. 485–490, Jan. 2008. [2] J. R. de Britto, A. E. Demian Jr., E. A. A. Coelho, L. C. de Freitas, V. J. Farias, J. B. Vieira Jr., “A Proposal of Led Lamp Driver for Universal Input Using Cuk Converter,” IEEE 39th Power Electronics Specialists Conference, Rhoedes, 2008. [3] J. R. de Britto, A. E. Demian Jr., E. A. A. Coelho, L. C. de Freitas, V. J. Farias, J. B. Vieira Jr., “LED Lamp Driver Using a Converter with Wide Range Conversion Microcontroller-Based,” 34th Annual Conference of the IEEE Industrial Electronics Society (Accepted), Orlando, 2008. [4] J. A. Morales-Saldaña, J. Leyva-Ramos, E. E. Carbajal-Gutiérrez, “Modeling of Switch-Mode DC-DC Cascade Converters,” IEEE Trans. on Aerospace and Electronic Systems, vol. 38, pp. 295–299, Jan. 2002.

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