LOSS MITIGATION AND EFFICIENCY ENHANCEMENT IN CASCADED H-BRIDGE MULTILEVEL INVERTERS THROUGH INDUCTIVE DECOUPLING.
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| Title: | LOSS MITIGATION AND EFFICIENCY ENHANCEMENT IN CASCADED H-BRIDGE MULTILEVEL INVERTERS THROUGH INDUCTIVE DECOUPLING. |
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| Authors: | K. S. R., DEEPIKA1, S. K., ABDUL AHAD2, R., SRINIVASA RAO3 |
| Source: | i-Manager's Journal on Electrical Engineering. Mar2026, Vol. 19 Issue 3, p61-80. 20p. |
| Subjects: | Electric power conversion, Power electronics, Energy dissipation, Alternating current electric motors, Electric testing |
| Abstract: | This cascaded h-bridge multilevel structure is designed to balance cost and efficiency. A key problem in such H-bridge inverters is the high switching loss that arises when the SiC-MOSFET turns on against a silicon diode. This causes large turnoff losses in the silicon diode due to stored bipolar charge carriers. To solve this issue, the paper introduces an inductive decoupling concept. Small additional inductors are placed between the SiC-MOSFET half bridge and the IGBT with silicon diode half bridge. These inductors reduce the electrical interaction between the two branches during switching events. As a result, the turn-on losses of the active SiC-MOSFET and the turn-off losses of the passive silicon diode are greatly reduced. This leads to lower total inverter losses compared to a conventional non-decoupled cascaded Hbridge multilevel inverter. Double pulse tests are used to accurately measure switching losses. While a cascaded Hbridge multilevel inverter setup is used to validate system-level behaviour with closed loop AC motor load conditions. The proposed inductive decoupling reduces the total switching energy per event from approximately 420 µJ to 260 µJ. This corresponding to a reduction of about 38% compared with the conventional coupled hybrid inverter. This allows reorganization of an optimal value for the decoupling inductance. The performance results show that inductive decoupling improves average efficiency during realistic vehicle operation with proposed approach. [ABSTRACT FROM AUTHOR] |
| Copyright of i-Manager's Journal on Electrical Engineering is the property of i-manager Publications 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: 195107632 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: LOSS MITIGATION AND EFFICIENCY ENHANCEMENT IN CASCADED H-BRIDGE MULTILEVEL INVERTERS THROUGH INDUCTIVE DECOUPLING. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22K%2E+S%2E+R%2E%2C+DEEPIKA%22">K. S. R., DEEPIKA</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22S%2E+K%2E%2C+ABDUL+AHAD%22">S. K., ABDUL AHAD</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22R%2E%2C+SRINIVASA+RAO%22">R., SRINIVASA RAO</searchLink><relatesTo>3</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22i-Manager's+Journal+on+Electrical+Engineering%22">i-Manager's Journal on Electrical Engineering</searchLink>. Mar2026, Vol. 19 Issue 3, p61-80. 20p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Electric+power+conversion%22">Electric power conversion</searchLink><br /><searchLink fieldCode="DE" term="%22Power+electronics%22">Power electronics</searchLink><br /><searchLink fieldCode="DE" term="%22Energy+dissipation%22">Energy dissipation</searchLink><br /><searchLink fieldCode="DE" term="%22Alternating+current+electric+motors%22">Alternating current electric motors</searchLink><br /><searchLink fieldCode="DE" term="%22Electric+testing%22">Electric testing</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: This cascaded h-bridge multilevel structure is designed to balance cost and efficiency. A key problem in such H-bridge inverters is the high switching loss that arises when the SiC-MOSFET turns on against a silicon diode. This causes large turnoff losses in the silicon diode due to stored bipolar charge carriers. To solve this issue, the paper introduces an inductive decoupling concept. Small additional inductors are placed between the SiC-MOSFET half bridge and the IGBT with silicon diode half bridge. These inductors reduce the electrical interaction between the two branches during switching events. As a result, the turn-on losses of the active SiC-MOSFET and the turn-off losses of the passive silicon diode are greatly reduced. This leads to lower total inverter losses compared to a conventional non-decoupled cascaded Hbridge multilevel inverter. Double pulse tests are used to accurately measure switching losses. While a cascaded Hbridge multilevel inverter setup is used to validate system-level behaviour with closed loop AC motor load conditions. The proposed inductive decoupling reduces the total switching energy per event from approximately 420 µJ to 260 µJ. This corresponding to a reduction of about 38% compared with the conventional coupled hybrid inverter. This allows reorganization of an optimal value for the decoupling inductance. The performance results show that inductive decoupling improves average efficiency during realistic vehicle operation with proposed approach. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of i-Manager's Journal on Electrical Engineering is the property of i-manager Publications 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: 10.26634/jee.19.3.1128 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 20 StartPage: 61 Subjects: – SubjectFull: Electric power conversion Type: general – SubjectFull: Power electronics Type: general – SubjectFull: Energy dissipation Type: general – SubjectFull: Alternating current electric motors Type: general – SubjectFull: Electric testing Type: general Titles: – TitleFull: LOSS MITIGATION AND EFFICIENCY ENHANCEMENT IN CASCADED H-BRIDGE MULTILEVEL INVERTERS THROUGH INDUCTIVE DECOUPLING. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: K. S. R., DEEPIKA – PersonEntity: Name: NameFull: S. K., ABDUL AHAD – PersonEntity: Name: NameFull: R., SRINIVASA RAO IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 03 Text: Mar2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 09738835 Numbering: – Type: volume Value: 19 – Type: issue Value: 3 Titles: – TitleFull: i-Manager's Journal on Electrical Engineering Type: main |
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