Optimized Resonators for Piezoelectric Power Conversion
The performance of inductors at high frequencies and small sizes is one of the largest limiting factors in the continued miniaturization of dc-dc converters. Piezoelectric resonators can have a very high quality factor and provide an inductive impedance between their series and parallel resonant fre...
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| Format: | Article |
| Language: | English |
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IEEE
2021-01-01
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| Series: | IEEE Open Journal of Power Electronics |
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| Online Access: | https://ieeexplore.ieee.org/document/9381643/ |
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| author | Weston D. Braun Eric A. Stolt Lei Gu Jeronimo Jeronimo Segovia-Fernandez Sombuddha Chakraborty Ruochen Lu Juan M. Rivas-Davila |
| author_facet | Weston D. Braun Eric A. Stolt Lei Gu Jeronimo Jeronimo Segovia-Fernandez Sombuddha Chakraborty Ruochen Lu Juan M. Rivas-Davila |
| author_sort | Weston D. Braun |
| collection | DOAJ |
| description | The performance of inductors at high frequencies and small sizes is one of the largest limiting factors in the continued miniaturization of dc-dc converters. Piezoelectric resonators can have a very high quality factor and provide an inductive impedance between their series and parallel resonant frequencies, making them a promising technology for further miniaturizing dc-dc converters. In this paper we analyze the impact of resonator parameters on the performance of the piezoelectric resonator based dc-dc converter, derive the optimal load impedance and efficiency limits, and analyze the impacts of varying conversion ratio and load impedance. This work is accompanied by a prototype dc-dc converter using a piezoelectric resonator fabricated from lithium niobate. The piezoelectric resonator has a quality factor of 4178 and a coupling coefficient, <inline-formula><tex-math notation="LaTeX">$k_t^2$</tex-math></inline-formula>, of 29%. The converter is able to achieve high efficiency zero voltage switching and a continuously variable conversion ratio without the use of any discrete inductors. It achieves a maximum power output of 30.9 W at an efficiency of 95.2% with a power density of 6.76 <inline-formula><tex-math notation="LaTeX">$\frac{\text {W}}{\text {cm}^3}$</tex-math></inline-formula>. |
| format | Article |
| id | doaj-art-31f50862ccfd487d86f88d407c490ed4 |
| institution | Kabale University |
| issn | 2644-1314 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Open Journal of Power Electronics |
| spelling | doaj-art-31f50862ccfd487d86f88d407c490ed42025-01-31T00:02:15ZengIEEEIEEE Open Journal of Power Electronics2644-13142021-01-01221222410.1109/OJPEL.2021.30670209381643Optimized Resonators for Piezoelectric Power ConversionWeston D. Braun0https://orcid.org/0000-0003-1363-2245Eric A. Stolt1Lei Gu2https://orcid.org/0000-0001-9556-6426Jeronimo Jeronimo Segovia-Fernandez3Sombuddha Chakraborty4https://orcid.org/0000-0003-0982-8296Ruochen Lu5https://orcid.org/0000-0003-0025-3924Juan M. Rivas-Davila6https://orcid.org/0000-0003-2494-8579Electrical Engineering, Stanford University, Stanford, California, USAElectrical Engineering, Stanford University, Stanford, California, USAElectrical Engineering, Stanford University, Stanford, California, USAKilby Labs, Texas Instruments Inc., Santa Clara, CA, USAKilby Labs, Texas Instruments Inc., Santa Clara, CA, USAElectrical and Computer Engineering, The University of Texas at Austin, Austin, Texas, USAElectrical Engineering, Stanford University, Stanford, California, USAThe performance of inductors at high frequencies and small sizes is one of the largest limiting factors in the continued miniaturization of dc-dc converters. Piezoelectric resonators can have a very high quality factor and provide an inductive impedance between their series and parallel resonant frequencies, making them a promising technology for further miniaturizing dc-dc converters. In this paper we analyze the impact of resonator parameters on the performance of the piezoelectric resonator based dc-dc converter, derive the optimal load impedance and efficiency limits, and analyze the impacts of varying conversion ratio and load impedance. This work is accompanied by a prototype dc-dc converter using a piezoelectric resonator fabricated from lithium niobate. The piezoelectric resonator has a quality factor of 4178 and a coupling coefficient, <inline-formula><tex-math notation="LaTeX">$k_t^2$</tex-math></inline-formula>, of 29%. The converter is able to achieve high efficiency zero voltage switching and a continuously variable conversion ratio without the use of any discrete inductors. It achieves a maximum power output of 30.9 W at an efficiency of 95.2% with a power density of 6.76 <inline-formula><tex-math notation="LaTeX">$\frac{\text {W}}{\text {cm}^3}$</tex-math></inline-formula>.https://ieeexplore.ieee.org/document/9381643/DC-DC power converterspiezoelectric devices |
| spellingShingle | Weston D. Braun Eric A. Stolt Lei Gu Jeronimo Jeronimo Segovia-Fernandez Sombuddha Chakraborty Ruochen Lu Juan M. Rivas-Davila Optimized Resonators for Piezoelectric Power Conversion IEEE Open Journal of Power Electronics DC-DC power converters piezoelectric devices |
| title | Optimized Resonators for Piezoelectric Power Conversion |
| title_full | Optimized Resonators for Piezoelectric Power Conversion |
| title_fullStr | Optimized Resonators for Piezoelectric Power Conversion |
| title_full_unstemmed | Optimized Resonators for Piezoelectric Power Conversion |
| title_short | Optimized Resonators for Piezoelectric Power Conversion |
| title_sort | optimized resonators for piezoelectric power conversion |
| topic | DC-DC power converters piezoelectric devices |
| url | https://ieeexplore.ieee.org/document/9381643/ |
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