Abstract
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.
Original language | English |
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Article number | 8735825 |
Pages (from-to) | 5214-5222 |
Number of pages | 9 |
Journal | IEEE Transactions on Industry Applications |
Volume | 55 |
Issue number | 5 |
DOIs | |
State | Published - 2019 |
Bibliographical note
Publisher Copyright:© 1972-2012 IEEE.
Keywords
- dv/dt filter
- high-frequency
- 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