Ultra-Small DC-Link Capacitor, GaN-Based Low Power AC Motor Drive for Low Cost Applications

dc.contributor.advisorAhmed, Sara
dc.contributor.authorGonzalez, Reynaldo Sergio
dc.contributor.committeeMemberQian, Chunjiang
dc.contributor.committeeMemberJin, Yufang
dc.creator.orcidhttps://orcid.org/0000-0002-1593-5808
dc.date.accessioned2024-02-09T21:57:16Z
dc.date.available2024-02-09T21:57:16Z
dc.date.issued2018
dc.descriptionThis item is available only to currently enrolled UTSA students, faculty or staff. To download, navigate to Log In in the top right-hand corner of this screen, then select Log in with my UTSA ID.
dc.description.abstractIn some motor drive applications, such as fans and pumps, high performance, in general, is not required and regeneration is not needed. These application areas are sensitive to price and therefore reduction of weight and volume is very beneficial. The size and cost of passive components have become one of main concerns in terms of cost, volume, and weight. In the past, researchers tried to reduce the number of semi-conductors switches since the cost of semi-conductor switches was more significant than that of passive components. However, in these days, reducing passive components such as inductors, transformers, and electrolytic capacitors is much more significant than to reduce active elements in terms of size and cost effectiveness. In addition, the lifespan of electrolytic capacitors is typically shorter than the other components in the drive systems. Reducing the dc bus capacitance offers the improved input current THD, resulting in reduced input filter requirements. The benefits of ultra-small dc link drives are summarized as below: a) Improvement of input current THD due to absence of huge capacitance b) Cheaper, smaller, and lighter due to reduction of passive components c) Higher reliability, if electrolytic capacitors are replaced with film capacitors. This thesis presents the design of an ultra-small DC link capacitor motor drive by utilizing wide band gap (WBG) based power electronics. It examines the benefits of eliminating the dc-choke in a motor drive and reducing the size of the dc-link capacitor while designing the motor drive using Gallium Nitride (GaN) power transistors. Real-time simulation is performed to verify the performance of the developed drive and the analysis. The system performance is further validated with experimental results using a hardware prototype of the motor drive built with GaN-based transistors.
dc.description.departmentElectrical and Computer Engineering
dc.format.extent51 pages
dc.format.mimetypeapplication/pdf
dc.identifier.isbn9780438300279
dc.identifier.urihttps://hdl.handle.net/20.500.12588/3773
dc.languageen
dc.subjectDC Link Capacitor
dc.subjectDrive
dc.subjectGaN
dc.subjectInverter
dc.subjectLow Cost
dc.subjectMotor
dc.subject.classificationEngineering
dc.titleUltra-Small DC-Link Capacitor, GaN-Based Low Power AC Motor Drive for Low Cost Applications
dc.typeThesis
dc.type.dcmiText
dcterms.accessRightspq_closed
thesis.degree.departmentElectrical and Computer Engineering
thesis.degree.grantorUniversity of Texas at San Antonio
thesis.degree.levelMasters
thesis.degree.nameMaster of Science

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