1. An Ultralow Loss Inductorless $dv/dt$ Filter Concept for Medium-Power Voltage Source Motor Drive Converters With SiC Devices.
- Author
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Velander, Erik, Bohlin, Georg, Sandberg, Asa, Wiik, Thomas, Botling, Fredrik, Lindahl, Martin, Zanuso, Giovanni, and Nee, Hans-Peter
- Subjects
SILICON carbide ,IDEAL sources (Electric circuits) ,METAL oxide semiconductor field-effect transistor circuits ,BIPOLAR transistors ,ELECTRIC inductors - Abstract
In this paper, a novel $dv/dt$ filter is presented targeted for 100-kW to 1-MW voltage source converters using silicon carbide (SiC) power devices. This concept uses the stray inductance between the power device and the converter output as a filter component in combination with an additional small RC-link. Hence, a lossy, bulky, and costly filter inductor is avoided and the resulting output $dv/dt$ is limited to 5–10 kV/$\mu$s independent of the output current and switching speed of the SiC devices. As a consequence, loads with $dv/dt$ constraints, e.g., motor drives can be fed from SiC devices enabling full utilization of their high switching speed. Moreover, a filter-model is proposed for the selection of filter component values for a certain $dv/dt$ requirement. Finally, results are shown using a 300-A 1700-V SiC metal–oxide–semiconductor field-effect transistor (
mosfet ). These results show that the converter output $dv/dt$ can be limited to 7.5 kV/ $\mu$s even though values up to 47 kV/ $\mu$s were measured across the SiCmosfet module. Hence, the total switching losses, including the filter losses, are verified to be three times lower compared to when themosfet $dv/dt$ was slowed down by adjusting the gate driver. [ABSTRACT FROM AUTHOR]- Published
- 2018
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