Controller for a reduced output current ripple DC-DC buck converter

2015 ◽  
Author(s):  
Jose M. Sosa ◽  
P.R. Martinez-Rodriguez ◽  
G. Escobar ◽  
J.C. Nava-Cruz ◽  
C.A. Limones-Pozos
Keyword(s):  
Buck Converter ◽  
Output Current ◽  
Current Ripple

scholarly journals Stacked Buck Converter: Current Ripple Elimination Effect and Transient Response

Energies ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 64
Author(s):  
Chien-Chun Huang ◽  
Yu-Chen Liu ◽  
Chia-Ching Lin ◽  
Chih-Yu Ni ◽  
Huang-Jen Chiu
Keyword(s):  
Transient Response ◽  
Dead Time ◽  
Control Method ◽  
Buck Converter ◽  
Modulation Method ◽  
Output Current ◽  
Time Modulation ◽  
Advantages And Disadvantages ◽  
Improvement Method ◽  
Current Ripple

To balance the cost and volume when applying a low output current ripple, the power supply design should be able to eliminate the current ripple under any duty cycle in medium and high switching frequencies, and considerably reduce filter volume to improve power density. A stacked buck converter was eventually selected after reviewing the existing solutions and discussing their advantages and disadvantages. A stacked buck converter is used as a basis to propose the transient response and output current ripple elimination effect, boundary limit control method, and low output ripple dead time modulation method to make individual improvements. The principle, mathematical derivation, small-signal model, and compensator design method of the improvement method are presented in detail. Moreover, simulation results are used to mutually verify the correctness and effectiveness of the improvement method. A stacked buck converter with 330-V input, 50-V output, and 1-kW output power was implemented to verify the effect of the low output current ripple dead time modulation. Experimental results showed that the peak-to-peak value of the output current ripple was reduced from 2.09 A to 559 mA, and the RMS value was reduced from 551 mA to 91 mA, thereby effectively improving the output current ripple.

Reduced output current ripple DC-DC buck converter control

2016 ◽  
Author(s):  
Jose M. Sosa ◽  
P. R. Martinez-Rodriguez ◽  
G. Escobar ◽  
G. Vazquez ◽  
J. C. Nava-Cruz
Keyword(s):  
Buck Converter ◽  
Output Current ◽  
Current Ripple

Markov Chain Modeling for Reliability Analysis of Multi-Phase Buck Converters

2019 ◽  
Vol 29 (09) ◽  
pp. 2050139 ◽  
Author(s):  
Elias Shokati Asl ◽  
Mehran Sabahi ◽  
Mehdi Abapour ◽  
Alireza Eyvazizadeh Khosroshahi ◽  
Hossein Khoun-Jahan
Keyword(s):  
Electromagnetic Interference ◽  
Buck Converter ◽  
Buck Converters ◽  
Time To Failure ◽  
Output Current ◽  
Fast Transient Response ◽  
Comprehensive Comparison ◽  
Multi Phase ◽  
Mean Time ◽  
Current Ripple

In recent years, the structure of multi-phase buck converter also called Interleaved Buck Converter (IBC) has gained considerable attention. The advantages of the IBC in comparison to the conventional Buck converter (CBC) are the lower output current ripple, higher efficiency, fast transient response, lower electromagnetic interference and higher reliability. Since more than one stage is employed in the IBC, this converter is highly reliable. In this paper, the reliability and mean time to failure (MTTF) of the CBC, and two- and three-stage IBCs are figured out. Using the obtained results and considering various scenarios, a comprehensive comparison is provided. In addition, the operation of the converter in case of fault occurrence for high and low capacities is analyzed and reliability is evaluated in each state. The relation between the reliability and temperature of semiconductor elements is discussed. Furthermore, a laboratory-scaled prototype is used to extract the experimental results of the temperature variation of the elements during a fault. Markov model is used to evaluate the analyzed reliability.

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