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Jeong-o Jeong

University: University of Maryland Baltimore County
Major
: Computer Engineering
Gradation Date: May 2009
Hometown:   Centreville , VA

My Project: Development of software tools for extracting model parameters of SiC power diodes

The emergence of High-Voltage, High-Frequency Silicon-Carbide power devices is expected to revolutionize industrial and military power generation, transmission, and distribution systems. Progress has been made in developing 10 kV SiC Junction Barrier Schottky (JBS), PiN, and Merge PiN Schottky ( MPS ) power diodes. The goal of the Defense Advanced Research Projects Agency (DARPA) Wide Bandgap Semiconductor Technology- High Power Electronics ( WBST -HPE) Phase II program is to develop 100 A, 10 kV SiC power modules required to demonstrate a 13.8 kV, 2.75 MVA Solid State Power Substation (SSPS) in DARPA WBST -HPE Phase III . NIST is playing a critical role in enabling the development of SiC devices by providing electrical and thermal measurements, as well as developing and delivering electro-thermal models for circuit simulations to industry and other government agencies.

The goal of the SURF project is to develop and demonstrate a new software package called DIode Model Parameter extrACtion Tools (DIMACT) that is necessary to extract parameters for both Si and SiC power diode models. The software package is developed using LabWindows/CVI and consists of three programs: 1) JBS MeaSuRement (JBSMSR) program, 2) MPS MeaSuRement (MPSMSR) program, and 3) PiN MeaSuRement (PiNMSR) program. Each program incorporates graphical user interfaces (GUIs) for monitoring and acquiring data for diode forward characteristics, reverse recovery switching, and junction capacitance characteristics. The DIMACT software tools then uses an extraction sequence consisting of linear curve fitting and Gauss-Newton algorithm optimization procedures to determine the diode model parameters.

The model parameters extracted from the new DIMPACT tools are incorporated into diode models for simulation in the Saber circuit simulator. The simulated results obtained using these models are compared with measured data to validate the extracted parameters. The results demonstrate that the model parameters extracted from the JBSMSR program are accurate for both low voltage (e.g. 45 V) Si JBS diodes and high voltage (e.g. 10 kV) SiC JBS diodes. These models are being used as part of a 100 A, 10 kV half-bridge SiC MOSFET/JBS power module model that will be used to perform the simulations necessary to design the SSPS in WBST -HPE Phase III .

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Date created: 12/8/2008
Last updated: 12/8/2008