ELECTRICAL PROJECTS USING MATLAB/SIMULINK Gmail:asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in
0-9347143789/9949240245
A Switching Control Strategy for Single and Dual Inductor Current-Fed Push-Pull Converters ABSTRACT: A switching control strategy is proposed for single and dual inductor current-fed push-pull converters. The proposed switching control strategy can be used with both current-fed push-pull converters with an active voltage doubler rectifier, or active rectifier, in the secondary side of the isolation transformer. The proposed switching control strategy makes turn-on and turn-off processes of the primary side power switches zero-voltage-switching and zero-current-switching respectively. The soft-switching operation of the single and dual inductor push-pull converters, with both types of active rectifier, is explained. Simulation and experimental results are provided to validate soft switching operation of the current-fed push-pull converters with the proposed switching control strategy.
KEYWORDS: 1. Single and dual inductor current-fed push-pull converter 2. Active rectifier 3. Zero-voltage-switching 4. Zero-current-switching.
SOFTWARE: MATLAB/SIMULINK
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ELECTRICAL PROJECTS USING MATLAB/SIMULINK Gmail:asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in
0-9347143789/9949240245 CIRCUIT DIAGRAM:
Fig. 1. (a) Dual, and (b) single inductor CFPP converters with the secondary side voltage doubler rectifier.
EXPECTED SIMULATION RESULTS:
Fig. 2. U1 current (A) of dual inductor CFPP converter along with its switch control signal and corresponding secondary side switch (U4) control signal.
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ELECTRICAL PROJECTS USING MATLAB/SIMULINK Gmail:asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in
0-9347143789/9949240245
Fig. 3. Drain to source (VDS) voltage (V) of U1 and scaled (100:1) gate control signal of dual inductor CFPP converter.
Fig. 4. U1 current (A) of single inductor CFPP converter and control signal.
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ELECTRICAL PROJECTS USING MATLAB/SIMULINK Gmail:asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in
0-9347143789/9949240245
Fig. 5. Drain to source voltage (VDS) (V) and gate control signal (200:1) of U1 of single inductor CFPP converter.
Figure 6. U1 current (A) of dual inductor CFPP converter along with its switch control signal and corresponding secondary side switch (U4) control signal in mode II.
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0-9347143789/9949240245
ELECTRICAL PROJECTS USING MATLAB/SIMULINK Gmail:asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in
0-9347143789/9949240245
Fig. 7. U1 current (A) of single inductor CFPP converter along with its switch control signal in mode II.
CONCLUSION: A switching control strategy is proposed for single and dual inductor CFPP converters with secondary side active rectifiers. The primary side power switches are turned-on and turned-off with ZVS and ZCS respectively with the help of synchronous operation of the secondary side power switches. The gain improvement of CFPP converters due to the proposed switching strategy is revealed under two modes of operation with similar switching characteristics. The performance dependency of the switching control strategy on the leakage inductance of the isolation transformer is critically analyzed. A detailed theoretical analysis is provided assuming ideal circuit conditions. Simulation and experimental results are provided to further validate the operation of the proposed switching control strategy.
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0-9347143789/9949240245
ELECTRICAL PROJECTS USING MATLAB/SIMULINK Gmail:asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in
0-9347143789/9949240245 REFERENCES: [1] M. Dale and S. M. Benson, ―Energy balance of the global photovoltaic (PV) industry - is the PV industry a net electricity producer?,‖ Environ. Sci. Technol, vol. 47, no. 7, pp. 3482–3489, 2013. [2] C. Olalla, D. Clement, M. Rodriguez, and D. Maksimovic, ―Architectures and control of submodule integrated DC-DC converters for photovoltaic applications,‖ IEEE Trans. Power Electron., vol. 8, no. 6, pp. 2980–2977, 2013. [3] L. Bangyin, D. Shanxu, and C. Tao, ―Photovoltaic DC-building-module-based BIPV system—concept and design considerations,‖ IEEE Trans. Power Electron., vol. 26, no. 5, pp. 1418–1429, May 2011. [4] D. D. Lu and V. G. Agelidis, ―Photovoltaic-battery-powered DC bus system for common portable electronic devices,‖ IEEE Trans. Power Electron., vol. 24, no. 3, pp. 849–855, 2009. [5] K.-C. Tseng, J.-T. Lin, and C.-C. Huang, ―High step-up converter with three-winding coupled inductor for fuel cell energy source applications,‖ IEEE Trans. Power Electron., 2014.
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