Design, modelling and evaluation of a GaN based motor drive for a solar car

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In recent years, electrical vehicle (EV) starts showing its unique advantages that the conventional combustion vehicles do not have. Together with the increasing interests on EV, the motor drive with higher efficiency and lighter weight also becomes more attractive. A promising solution is to apply the wide band gap (WBG) components including gallium nitride (GaN) and silicon carbide (SiC) in the motor drive. Thus, the performance of the GaN, SiC and Si based motor drive in this application are compared. Besides, as the current maximum current rating of the GaN and SiC MOSFET is limited and insufficient to satisfy the large phase current in the acceleration and braking process, the inverter topology that adds the parallel MOSFETs in one position is considered. To reduce the time and cost for the development, this paper proposes the modelling of the motor drive, with which the voltage and current stress, power loss, thermal and electromagnetic performance can all be evaluated. The modelling to be introduced consists of the 1-D power loss, simplified thermal modelling of the motor drive and the 3-D modelling of the electromagnetic performance, detailed thermal performance of the motor drive. In the 3-D modelling, to make the heat transfer simulation closer to the realistic, computational fluid dynamic (CFD) is used to evaluated the heat transfer coefficient on the surface with forced air-cooling.
Original languageEnglish
Title of host publicationIECON 2019-45th Annual Conference of the IEEE Industrial Electronics Society
Number of pages6
ISBN (Electronic)978-1-7281-4878-6
Publication statusPublished - 2019
EventIECON 2019: IEEE 45th Annual Conference of the Industrial Electronics Society - Lisbon, Portugal
Duration: 14 Oct 201917 Oct 2019
Conference number: 45th


ConferenceIECON 2019

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