Investigation and application of high-efficiency large-step-down power conversion architectures
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2016.
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| Format: | Thesis |
| Language: | eng |
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Massachusetts Institute of Technology
2017
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| Online Access: | http://hdl.handle.net/1721.1/107284 |
| _version_ | 1811090124357763072 |
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| author | Gunter, Samantha Joellyn |
| author2 | David J. Perreault and Khurram K. Afridi. |
| author_facet | David J. Perreault and Khurram K. Afridi. Gunter, Samantha Joellyn |
| author_sort | Gunter, Samantha Joellyn |
| collection | MIT |
| description | Thesis: Ph. D., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2016. |
| first_indexed | 2024-09-23T14:34:12Z |
| format | Thesis |
| id | mit-1721.1/107284 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T14:34:12Z |
| publishDate | 2017 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/1072842019-04-11T12:52:00Z Investigation and application of high-efficiency large-step-down power conversion architectures Gunter, Samantha Joellyn David J. Perreault and Khurram K. Afridi. Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science. Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science. Electrical Engineering and Computer Science. Thesis: Ph. D., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2016. This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections. Cataloged from student-submitted PDF version of thesis. Includes bibliographical references (pages 355-360). In this thesis, we introduce two large-step-down dc-dc converter architectures that are designed to provide zero-voltage switching of the power devices. While the techniques used in these converters can be used in a wide range of applications, the operating voltage and power levels used in this thesis are for data centers, where dc distribution power delivery is expected to see its first deployment. The nominal 380 V bus voltage will need to be converted to 12 V using a high-efficiency dc-dc converter that can deliver several hundred watts of power to each rack to power the servers. The converters are expected to operate efficiently across a wide input voltage range of 260 V to 410 V and down to powers in the tens of watts range. The first converter architecture is based on the concept of an Impedance Control Network (ICN) resonant converter. Using phase-shift control along with a specifically designed impedance network, this converter can maintain resistive loading of the inverters as the input voltage varies. To back down in power, the converter can be efficiently operated using burst (on/off) mode control. To deliver lower power, we introduce an additional control technique using Variable Frequency Multiplier (VFX) inverters and/or rectifiers. The second converter architecture combines the properties of an active bridge converter with multiple stacked inverters, a multi-winding single core transformer, and a reconfigurable rectifier. The stacked inverter topology improves the range of powers over which zero-voltage switching can be achieved. The multi-winding transformer and reconfigurable rectifier further extend the efficient operating range to very low powers by reducing core loss and increasing zero-voltage switching capability. Both proposed architectures are suitable for large-step-down, wide-input voltage, wide-output power applications such as dc-dc converters for dc distribution. by Samantha Joellyn Gunter. Ph. D. 2017-03-10T14:19:44Z 2017-03-10T14:19:44Z 2016 2016 Thesis http://hdl.handle.net/1721.1/107284 972905030 eng MIT theses are protected by copyright. They may be viewed, downloaded, or printed from this source but further reproduction or distribution in any format is prohibited without written permission. http://dspace.mit.edu/handle/1721.1/7582 360 pages application/pdf Massachusetts Institute of Technology |
| spellingShingle | Electrical Engineering and Computer Science. Gunter, Samantha Joellyn Investigation and application of high-efficiency large-step-down power conversion architectures |
| title | Investigation and application of high-efficiency large-step-down power conversion architectures |
| title_full | Investigation and application of high-efficiency large-step-down power conversion architectures |
| title_fullStr | Investigation and application of high-efficiency large-step-down power conversion architectures |
| title_full_unstemmed | Investigation and application of high-efficiency large-step-down power conversion architectures |
| title_short | Investigation and application of high-efficiency large-step-down power conversion architectures |
| title_sort | investigation and application of high efficiency large step down power conversion architectures |
| topic | Electrical Engineering and Computer Science. |
| url | http://hdl.handle.net/1721.1/107284 |
| work_keys_str_mv | AT guntersamanthajoellyn investigationandapplicationofhighefficiencylargestepdownpowerconversionarchitectures |