Wide Load Range Capacitor Clamped ZVZCS Half Bridge Three-Level DC-DC Converter with Two Unsymmetrical Bi-directional Switches
This paper presents a zero-voltage and zero-current switching (ZVZCS) capacitor-clamped half bridge (HB) three-level dc-dc converter (TLDC), which is well fit for high input voltage dc-dc industrial applications. The maximum voltage stress of the primary switches is limited by the flying capacitor a...
| Main Author: | |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2019-06-01
|
| Series: | Energies |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1073/12/12/2362 |
| _version_ | 1798006715499675648 |
|---|---|
| author | Yong Shi |
| author_facet | Yong Shi |
| author_sort | Yong Shi |
| collection | DOAJ |
| description | This paper presents a zero-voltage and zero-current switching (ZVZCS) capacitor-clamped half bridge (HB) three-level dc-dc converter (TLDC), which is well fit for high input voltage dc-dc industrial applications. The maximum voltage stress of the primary switches is limited by the flying capacitor and input capacitors, which is very close to V<sub>in</sub>/2. Two unsymmetrical bidirectional switches are used to replace two of the primary switches in a conventional capacitor-clamped HB TLDC, which ensure ZVZCS of the main switches in wide load range. The reverse direction MOSFETs in the unsymmetrical bidirectional switches have low on-state resistance and are controlled with soft-switching mode irrelevant to the load current. Therefore, the additional power loss can be omitted. The current of the flying capacitor is greatly reduced due to ZVZCS operation, which would result in a smaller volume flying capacitor and high system reliability. Furthermore, the current imbalance problem of the power devices is also well solved. The circuit, basic operation principles and some important technical analyses are discussed in this paper, and experimental results from a 1-kW prototype are provided to evaluate the proposed converter. |
| first_indexed | 2024-04-11T12:59:01Z |
| format | Article |
| id | doaj.art-165ec764d30b4ca596708561284c9e6d |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-11T12:59:01Z |
| publishDate | 2019-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-165ec764d30b4ca596708561284c9e6d2022-12-22T04:22:59ZengMDPI AGEnergies1996-10732019-06-011212236210.3390/en12122362en12122362Wide Load Range Capacitor Clamped ZVZCS Half Bridge Three-Level DC-DC Converter with Two Unsymmetrical Bi-directional SwitchesYong Shi0School of Electrical and Control Engineering, Shaanxi University of Science and Technology, Xi’an 710021, ChinaThis paper presents a zero-voltage and zero-current switching (ZVZCS) capacitor-clamped half bridge (HB) three-level dc-dc converter (TLDC), which is well fit for high input voltage dc-dc industrial applications. The maximum voltage stress of the primary switches is limited by the flying capacitor and input capacitors, which is very close to V<sub>in</sub>/2. Two unsymmetrical bidirectional switches are used to replace two of the primary switches in a conventional capacitor-clamped HB TLDC, which ensure ZVZCS of the main switches in wide load range. The reverse direction MOSFETs in the unsymmetrical bidirectional switches have low on-state resistance and are controlled with soft-switching mode irrelevant to the load current. Therefore, the additional power loss can be omitted. The current of the flying capacitor is greatly reduced due to ZVZCS operation, which would result in a smaller volume flying capacitor and high system reliability. Furthermore, the current imbalance problem of the power devices is also well solved. The circuit, basic operation principles and some important technical analyses are discussed in this paper, and experimental results from a 1-kW prototype are provided to evaluate the proposed converter.https://www.mdpi.com/1996-1073/12/12/2362three-level dc-dc converterZVZCScapacitor clampedbalanced current distribution |
| spellingShingle | Yong Shi Wide Load Range Capacitor Clamped ZVZCS Half Bridge Three-Level DC-DC Converter with Two Unsymmetrical Bi-directional Switches Energies three-level dc-dc converter ZVZCS capacitor clamped balanced current distribution |
| title | Wide Load Range Capacitor Clamped ZVZCS Half Bridge Three-Level DC-DC Converter with Two Unsymmetrical Bi-directional Switches |
| title_full | Wide Load Range Capacitor Clamped ZVZCS Half Bridge Three-Level DC-DC Converter with Two Unsymmetrical Bi-directional Switches |
| title_fullStr | Wide Load Range Capacitor Clamped ZVZCS Half Bridge Three-Level DC-DC Converter with Two Unsymmetrical Bi-directional Switches |
| title_full_unstemmed | Wide Load Range Capacitor Clamped ZVZCS Half Bridge Three-Level DC-DC Converter with Two Unsymmetrical Bi-directional Switches |
| title_short | Wide Load Range Capacitor Clamped ZVZCS Half Bridge Three-Level DC-DC Converter with Two Unsymmetrical Bi-directional Switches |
| title_sort | wide load range capacitor clamped zvzcs half bridge three level dc dc converter with two unsymmetrical bi directional switches |
| topic | three-level dc-dc converter ZVZCS capacitor clamped balanced current distribution |
| url | https://www.mdpi.com/1996-1073/12/12/2362 |
| work_keys_str_mv | AT yongshi wideloadrangecapacitorclampedzvzcshalfbridgethreeleveldcdcconverterwithtwounsymmetricalbidirectionalswitches |