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Traditional Hysteresis current control (T-HCC) method has a good transient response performance and robustness. However, when applied in the three-phase voltage source converters (VSCs) occasions, due to the interphases dependency and coupling among the three-phase currents, current harmonics and high switching frequency will arise. Considering of this, this paper presents a new sine-like HCC (SL-HCC)...
For the excellent electrical performance, Gallium Nitride (GaN) new-type semiconductor devices are preferred in high voltage, high frequency and high power applications. However, GaN devices have low on-resistance and the loop layout requires low damping in high frequency loop. These both can lead to voltage and current oscillations under high frequency and even cause uncontrollable oscillations,...
Due to the high switching speed of SiC MOSFET, the parasitic parameters and the low damping in the circuit, the turn-off overvoltage and oscillation of the freewheeling diode and SiC MOSFET are very severe. Based on the terminal impedances during the turn-off transition of the freewheeling diode and SiC MOSFET, the mechanism of the turn-off overvoltage and oscillation are analyzed and the suppressing...
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