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Abstract Header

High-Efficiency and High-Power Density DC-DC Converter for Data Center Application

Meng, Haoran
http://orcid.org/0009-0006-2832-923X
http://rave.ohiolink.edu/etdc/view?acc_num=dayton1701944973610495

Abstract Details

2023, Master of Science in Electrical Engineering, University of Dayton, Engineering.
Datacenter usage tends to increase as artificial intelligence (AI) grows and becomes more prevalent. High-power density and high efficiency power converters function as intermediate bus converters are required to increase the whole system efficiency for datacenter applications. This thesis presents solutions for intermediate bus converters and the second stage including a 9-times and a 22-times conversion ratio matrix autotransformer switched-capacitor DC-DC converter (MASC) and a detailed design of the 6V-1.5V interleaved buck converter as second stage for 48V dc bus data center applications. MASC has both advantages of switched tank converter and LLC converter. The high voltage side of MASC takes advantage of switched tank converter. The low voltage side of the MASC leveraged a new magnetic integrated autotransformer design that is like a current doubler rectifier in an LLC converter. Compared with the switched tank converter, MASC needs less switches on the low voltage rectifier side to achieve the same conversion ratio. All switches can achieve zero current switching and zero voltage switching. Thus, total power loss is reduced compared with switch tank converter. Compared with LLC converter, the use of matrix autotransformer further reduces the power loss of MASC by removing primary side winding. The optimum die area (phases) of traditional interleaved buck converter and series-capacitor interleaved is analyzed and their efficiency is compared. A 48V-5.33V MASC hardware prototype with a peak efficiency of 98.54%, a full load efficiency of 95.6%, and 654W/in3 power density is designed, built, and tested. A 22x MASC is simulated and the PCB layout is in process.
Dong Cao (Committee Chair)
Bradley Ratliff (Committee Member)
Raul Ordonez (Committee Member)
45 p.
Electrical Engineering
Switched capacitor converter; Datacenter application; IBC; DC-DC converter; ZCS

Recommended Citations

Citations

  • Meng, H. (2023). High-Efficiency and High-Power Density DC-DC Converter for Data Center Application [Master's thesis, University of Dayton]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1701944973610495

    APA Style (7th edition)

  • Meng, Haoran. High-Efficiency and High-Power Density DC-DC Converter for Data Center Application . 2023. University of Dayton, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=dayton1701944973610495.

    MLA Style (8th edition)

  • Meng, Haoran. "High-Efficiency and High-Power Density DC-DC Converter for Data Center Application ." Master's thesis, University of Dayton, 2023. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1701944973610495

    Chicago Manual of Style (17th edition)

dayton1701944973610495
35
© 2023, all rights reserved.
This open access ETD is published by University of Dayton and OhioLINK.