High slew rate of the line voltage (dv/dt) has been a concern for power inverters based on the emerging wide bandgap switching devices, such as silicon carbide (SiC) mosfets. Particularly, for SiC-based power inverters feeding electric machines interconnected with long cables, there could be more severe insulation stress on the stator windings in electric machines, due to the higher dv/dt output from the SiC inverters. Compared to the conventional lower voltage electric transportation applications (e.g., 270 V dc), higher dc bus voltage of 500-600 V can dramatically reduce cable weight and systematic copper losses, hence improve the power density and efficiency of power converters. However, high dc bus voltage further increases the dv/dt level in the converter ac line voltages. Driven by the necessity of developing SiC inverters with 500 V dc bus in electric transportation applications while attenuating the dv/dt stress to a low level, this paper presents a multi-domain design approach for dv/dt filters that comprehensively considers the constraints in electrical, magnetic, and thermal domains. Experimental results based on a 75 kW SiC inverter are provided to verify the efficacy of this design approach.
|Number of pages||9|
|Journal||IEEE Transactions on Industry Applications|
|State||Published - 2019|
Bibliographical noteFunding Information:
Manuscript received January 25, 2019; revised April 6, 2019; accepted May 10, 2019. Date of publication June 11, 2019; date of current version August 14, 2019. Paper 2018-TSC-1358.R1, presented at the 2018 IEEE Energy Conversion Congress and Exposition, Portland, OR, USA, Sep. 23–27, and approved for publication in the IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS by the Transportation Systems Committee of the IEEE Industry Applications Society. This work was supported by the U.S. Federal Aviation Administration under Award DTFAWA-15-A-80013. (Corresponding author: Cong Li.) J. He is with the Department of Electrical and Computer Engineering at the University of Kentucky, Lexington, KY 40506 USA (e-mail: firstname.lastname@example.org).
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- dv/dt filter
- motor drives
- multi-domain design
- silicon carbide (SiC) inverter
ASJC Scopus subject areas
- Control and Systems Engineering
- Industrial and Manufacturing Engineering
- Electrical and Electronic Engineering