Anti-series normally-On SiC JFETs operating as bidirectional switches

Saadeh, Mahmood; Chinthavali, Madhu; Ozpineci, Burak; Mantooth, H. Alan

doi:10.1109/ecce.2013.6647077

Cited by 9 publications

(3 citation statements)

References 7 publications

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“…The transient circuit schematic diagram after adding a ferrite ring is shown in Figure 10. Before adding the ferrite ring, (15) and (16) are valid.…”

Section: Effect Of Adding a Ferrite Ring On Parasitic Oscillation Durmentioning

confidence: 99%

“…Thus, the equivalent effect of inserting a ferrite ring can be regarded as the increase of Z L , and at the same time the damping resistance. According to (15)- (17), the increased parasitic impedance Z L and the added damping resistance are beneficial to limit the slew rate and the peak value of the current. Hence, the current oscillation during turn-on transient can be effectively damped by adding a ferrite ring.…”

Section: Of 19mentioning

confidence: 99%

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Analysis and Suppression of Unwanted Turn-On and Parasitic Oscillation in SiC JFET-Based Bi-Directional Switches

Wang

Yang

et al. 2018

Electronics

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Silicon Carbide (SiC)-based Bi-Directional Switches (BDS) have great potential in the construction of several power electronic circuits including multi-level converters, solid-state breakers, matrix converters, HERIC (high efficient and reliable inverter concept) photovoltaic grid-connected inverters and so on. In this paper, two issues with the application of SiC-based BDSs, namely, unwanted turn-on and parasitic oscillation, are deeply investigated. To eliminate unwanted turn-on, it is proposed to add a capacitor (C X ) paralleled at the signal input port of the driver IC (integrated circuit) and the capacitance range of C X is also analytically derived to guide the selection of C X . To mitigate parasitic oscillation, a combinational method, which combines a snubber capacitor (C J ) paralleled with the JFET (Junction Field Effect Transistor) and a ferrite ring connected in series with the power line, is proposed. It is verified that the use of C J mainly improves the turn-off transient and the use of a ferrite ring damps the current oscillation during the turn-on transient significantly. The effects of the proposed methods have been demonstrated by theoretical analysis and verified by experimental results.

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“…The transient circuit schematic diagram after adding a ferrite ring is shown in Figure 10. Before adding the ferrite ring, (15) and (16) are valid.…”

Section: Effect Of Adding a Ferrite Ring On Parasitic Oscillation Durmentioning

confidence: 99%

Section: Of 19mentioning

confidence: 99%

Analysis and Suppression of Unwanted Turn-On and Parasitic Oscillation in SiC JFET-Based Bi-Directional Switches

Wang

Yang

et al. 2018

Electronics

View full text Add to dashboard Cite

show abstract

“…BDSs are able to conduct current and block voltages in two directions, which are referred as four‐quadrant switches. Many power electronic systems which have the potential to be used in MEA such as the matrix converter, multi‐level converters, solid‐state breakers, and cycloconverters require the use of BDSs [7]. Among SiC power devices, SiC junction field‐effect transistor (JFET) have recently become more widely available as some of their advantages compared to SiC MOSFET has been already demonstrated [8, 9].…”

Section: Introductionmentioning

confidence: 99%