An active discharge scheme for DC-bus capacitors in EV powertrain

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dc.authorid0009-0001-9956-2112
dc.authorid0000-0001-7894-1167
dc.authorid0000-0001-6393-8299
dc.authorid0000-0001-6912-7219
dc.contributor.authorSezer, Mustafa Muraten_US
dc.contributor.authorNorwood, Danielen_US
dc.contributor.authorGeiger, Johnen_US
dc.contributor.authorHava, Ahmet Masumen_US
dc.contributor.authorAkın, Bilalen_US
dc.date.accessioned2025-09-26T07:10:56Z
dc.date.available2025-09-26T07:10:56Z
dc.date.issued2025-07-18
dc.departmentIşık Üniversitesi, Mühendislik ve Doğa Bilimleri Fakültesi, Elektrik-Elektronik Mühendisliği Bölümüen_US
dc.departmentIşık University, Faculty of Engineering and Natural Sciences, Department of Electrical and Electronics Engineeringen_US
dc.descriptionThe authors would like to thank Semiconductor Research Corporation (SRC)/Texas Analog Center of Excellence (TxACE) and Texas Instruments for supporting this research under the Task ID 3160.03.en_US
dc.description.abstractDuring the emergency situations, key-OFFs, or maintenance, discharging the inverter dc-bus capacitor voltage within seconds is imperative due to safety concerns (inverter not used to control motor). Conventional discharge methods rely on external resistors, additional switches, or motor windings, increasing cost, space requirements, and control complexity. This article presents a cost-effective and space-efficient solution that enables fast capacitor discharge by operating the inverter's SiC mosfets-either discrete devices or power modules-in linear mode. The proposed method utilizes a constant power tracking approach with pulse frequency modulation to safely discharge the high-voltage bus capacitor without external components. When the car is off, the proposed scheme discharges a 1000-V dc bus within 1 s using a single low-side SiC switch to test a worst-case scenario. In practice, all six devices can be used to share thermal stress, and the discharge time can be extended to 5 s as suggested by safety standards. Optimal operating conditions, including gate-source voltage (V{GS}) and pulse width (t{ON}}), are identified for different mosfets from various vendors. To assess long-term reliability, devices undergo more than 200 000 discharge cycles, with intrinsic parameter monitoring and failure analysis conducted to determine degradation mechanisms. The findings help establish safe operating conditions, ensuring robust and reliable integration of the proposed discharge method within the main powertrain inverter.en_US
dc.description.sponsorshipSemiconductor Research Corporation (SRC)/Texas Analog Center of Excellence (TxACE)en_US
dc.description.versionPublisher's Versionen_US
dc.identifier.citationSezer, M. M., Norwood, D., Geiger, J., Hava, A. M. & Akın, B. (2025). An active discharge scheme for DC-bus capacitors in EV powertrain. IEEE Transactions on Power Electronics, 40(11), 16512-16524. doi:https://doi.org/10.1109/TPEL.2025.3590734en_US
dc.identifier.doi10.1109/TPEL.2025.3590734
dc.identifier.endpage16524
dc.identifier.issn0885-8993
dc.identifier.issn1941-0107
dc.identifier.issue11
dc.identifier.scopus2-s2.0-105011845276
dc.identifier.scopusqualityQ1
dc.identifier.startpage16512
dc.identifier.urihttps://hdl.handle.net/11729/6722
dc.identifier.urihttps://doi.org/10.1109/TPEL.2025.3590734
dc.identifier.volume40
dc.identifier.wosWOS:001561547100033
dc.identifier.wosqualityQ1
dc.indekslendigikaynakScopusen_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScience Citation Index Expanded (SCI-EXPANDED)en_US
dc.institutionauthorHava, Ahmet Masumen_US
dc.institutionauthorid0000-0001-6393-8299
dc.language.isoenen_US
dc.peerreviewedYesen_US
dc.publicationstatusPublisheden_US
dc.publisherInstitute of Electrical and Electronics Engineers Inc.en_US
dc.relation.ispartofIEEE Transactions on Power Electronicsen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectActive dischargeen_US
dc.subjectConstant poweren_US
dc.subjectDC-bus capacitoren_US
dc.subjectElectric vehicles (EVs)en_US
dc.subjectInverteren_US
dc.subjectLinear mode operationen_US
dc.subjectSiC MOSFETen_US
dc.subjectBusesen_US
dc.subjectCost effectivenessen_US
dc.subjectElectric invertersen_US
dc.subjectFailure (mechanical)en_US
dc.subjectFailure analysisen_US
dc.subjectFrequency modulationen_US
dc.subjectPower MOSFETen_US
dc.subjectPowertrainsen_US
dc.subjectPulse time modulationen_US
dc.subjectReliability analysisen_US
dc.subjectResistorsen_US
dc.subjectSafety engineeringen_US
dc.subjectSilicon carbideen_US
dc.subjectVoltage controlen_US
dc.subjectBus capacitorsen_US
dc.subjectEVen_US
dc.subjectLinear modesen_US
dc.subjectMode operationen_US
dc.subjectSiC MOSFETsen_US
dc.subjectDegradationen_US
dc.subjectDischarges (electric)en_US
dc.subjectMotorsen_US
dc.subjectCapacitorsen_US
dc.subjectMOSFETen_US
dc.subjectControl systemsen_US
dc.subjectSwitchesen_US
dc.subjectPower dissipationen_US
dc.titleAn active discharge scheme for DC-bus capacitors in EV powertrainen_US
dc.typeArticleen_US
dspace.entity.typePublicationen_US

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