A High-Efficiency Single-Phase AC-AC Solid-State Transformer Without Electrolytic Capacitors.
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| Title: | A High-Efficiency Single-Phase AC-AC Solid-State Transformer Without Electrolytic Capacitors. |
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| Authors: | Wang, Hui1 (AUTHOR), Yan, Xiang1,2 (AUTHOR), Hou, Xiaochao1,2 (AUTHOR) houxc10@csu.edu.cn |
| Source: | Energies (19961073). Dec2025, Vol. 18 Issue 24, p6414. 12p. |
| Subjects: | Power density, Electrolytic capacitors, Voltage control, Reliability in engineering, Electric transformers, Matrix converters, Mechanical efficiency, AC DC transformers |
| Abstract: | This paper proposes a single-phase AC-AC solid-state transformer (SST) that eliminates bulky energy storage components. The proposed matrix-type structure comprises a line-frequency (LF) rectifier, a half-bridge (HB) LLC resonant converter, a buck–boost converter, and an LF inverter. The HB LLC resonant converter not only achieves high efficiency at unity voltage gain but also provides high-frequency (HF) isolation as a DC transformer (DCX). Meanwhile, the buck–boost converter ensures precise voltage regulation. The replacement of traditional DC-link electrolytic capacitors with small film capacitors effectively suppresses the second-harmonic power ripple, leading to a significant improvement in both power density and operational reliability. Experimental results from a 1 kW prototype demonstrate high-quality sinusoidal input and output, a wide range of zero-voltage switching (ZVS) operations, and stable output voltage control. [ABSTRACT FROM AUTHOR] |
| Copyright of Energies (19961073) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Header | DbId: egs DbLabel: Engineering Source An: 190470529 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: A High-Efficiency Single-Phase AC-AC Solid-State Transformer Without Electrolytic Capacitors. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Wang%2C+Hui%22">Wang, Hui</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yan%2C+Xiang%22">Yan, Xiang</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Hou%2C+Xiaochao%22">Hou, Xiaochao</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> houxc10@csu.edu.cn</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Energies+%2819961073%29%22">Energies (19961073)</searchLink>. Dec2025, Vol. 18 Issue 24, p6414. 12p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Power+density%22">Power density</searchLink><br /><searchLink fieldCode="DE" term="%22Electrolytic+capacitors%22">Electrolytic capacitors</searchLink><br /><searchLink fieldCode="DE" term="%22Voltage+control%22">Voltage control</searchLink><br /><searchLink fieldCode="DE" term="%22Reliability+in+engineering%22">Reliability in engineering</searchLink><br /><searchLink fieldCode="DE" term="%22Electric+transformers%22">Electric transformers</searchLink><br /><searchLink fieldCode="DE" term="%22Matrix+converters%22">Matrix converters</searchLink><br /><searchLink fieldCode="DE" term="%22Mechanical+efficiency%22">Mechanical efficiency</searchLink><br /><searchLink fieldCode="DE" term="%22AC+DC+transformers%22">AC DC transformers</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: This paper proposes a single-phase AC-AC solid-state transformer (SST) that eliminates bulky energy storage components. The proposed matrix-type structure comprises a line-frequency (LF) rectifier, a half-bridge (HB) LLC resonant converter, a buck–boost converter, and an LF inverter. The HB LLC resonant converter not only achieves high efficiency at unity voltage gain but also provides high-frequency (HF) isolation as a DC transformer (DCX). Meanwhile, the buck–boost converter ensures precise voltage regulation. The replacement of traditional DC-link electrolytic capacitors with small film capacitors effectively suppresses the second-harmonic power ripple, leading to a significant improvement in both power density and operational reliability. Experimental results from a 1 kW prototype demonstrate high-quality sinusoidal input and output, a wide range of zero-voltage switching (ZVS) operations, and stable output voltage control. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Energies (19961073) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.3390/en18246414 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 12 StartPage: 6414 Subjects: – SubjectFull: Power density Type: general – SubjectFull: Electrolytic capacitors Type: general – SubjectFull: Voltage control Type: general – SubjectFull: Reliability in engineering Type: general – SubjectFull: Electric transformers Type: general – SubjectFull: Matrix converters Type: general – SubjectFull: Mechanical efficiency Type: general – SubjectFull: AC DC transformers Type: general Titles: – TitleFull: A High-Efficiency Single-Phase AC-AC Solid-State Transformer Without Electrolytic Capacitors. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Wang, Hui – PersonEntity: Name: NameFull: Yan, Xiang – PersonEntity: Name: NameFull: Hou, Xiaochao IsPartOfRelationships: – BibEntity: Dates: – D: 15 M: 12 Text: Dec2025 Type: published Y: 2025 Identifiers: – Type: issn-print Value: 19961073 Numbering: – Type: volume Value: 18 – Type: issue Value: 24 Titles: – TitleFull: Energies (19961073) Type: main |
| ResultId | 1 |
