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Characterization and Design of Voltage-Mode Controlled Full-Bridge DC/DC Converter with Current Limit

Smith, Nathaniel R.
http://rave.ohiolink.edu/etdc/view?acc_num=wright152721348332911

Abstract Details

2018, Master of Science in Electrical Engineering (MSEE), Wright State University, Electrical Engineering.
Advancements in Direct Current (DC) electrical power systems have enabled new functionality in many, varied applications. Discrete power semiconductor devices are increasing in efficiency, switching frequency, and power density, resulting in greater usage of DC power management and distribution methods, including DC/DC conversion. DC distribution lacks inherent capability to safely and effectively break fault current, particularly in mobile solutions, where larger and slower electromechanical switching devices are not optimal or feasible. One solution is to design a low-energy breaking point into a switching power supply. Simpler converter designs, with a lower number of switching devices, have been modeled and can be functionally utilized for this purpose. However, these designs cannot easily or efficiently provide isolation between the source and the load. A full-bridge DC/DC converter can accomplish this task with galvanic isolation through a transformer. The full-bridge DC/DC converter is fairly complex to analyze with state-space analysis and does not have an existing averaged model. This thesis focuses on developing averaged and small-signal models for the full-bridge DC/DC converter; validating the small-signal averaged models by simulation in SABER circuit simulation software; and using the validated models to design a full-bridge DC/DC converter for simulation in SABER. The converter power stage is designed along with a Type II controller, a comparative current limit, non-Zero-Voltage-Switching gate drives, and a synchronous rectifier. The designed converter is evaluated for closed-loop stability against step changes in input voltage, load current, and reference voltage. The results are provided to show sufficient response of the full-bridge DC/DC converter, given the design parameters. The proposed architecture accommodates future work to reduce DC fault let-through energy.
Marian Kazimierczuk, Ph.D. (Advisor)
Ray Siferd, Ph.D. (Committee Member)
LaVern Starman, Ph.D. (Committee Member)
76 p.
Electrical Engineering
Full-Bridge; DC-DC Converter; DC Breaker; Current Limit; Electrical Power Systems; Small-Signal; Let-through energy; DC Fault; Reduced Model; Galvanic Isolation; Control Voltage Limit; Hard-Switch; Soft-Switch; Average Current-Mode; DC Distribution; ZVS

Recommended Citations

Citations

  • Smith, N. R. (2018). Characterization and Design of Voltage-Mode Controlled Full-Bridge DC/DC Converter with Current Limit [Master's thesis, Wright State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=wright152721348332911

    APA Style (7th edition)

  • Smith, Nathaniel. Characterization and Design of Voltage-Mode Controlled Full-Bridge DC/DC Converter with Current Limit. 2018. Wright State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=wright152721348332911.

    MLA Style (8th edition)

  • Smith, Nathaniel. "Characterization and Design of Voltage-Mode Controlled Full-Bridge DC/DC Converter with Current Limit." Master's thesis, Wright State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=wright152721348332911

    Chicago Manual of Style (17th edition)

wright152721348332911
936
© 2018, all rights reserved.
This open access ETD is published by Wright State University and OhioLINK.