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Based on the hybrid operation of interleaved flyback micro-inverter in discontinuous and boundary conduction modes (DCM and BCM), a novel adaptive snubber is proposed in this paper. The proposed snubber limits the drain-to-source voltage overshoot of the flyback's main switch during the turn-off process, enabling the use of lower voltage MOSFETs. It also recovers the stored energy in the leakage inductance...
This paper presents a novel GaN transistor based bidirectional isolated DC-DC converter for stationary energy storage device (SESD) for 400V DC microgrid. The improvements achieved in the application includes: first, benefitting from the internal ultra-fast free-wheeling diode, the converter's operation range can be expended to light load conditions (switches operate in hard switching). The light...
The bidirectional isolated AC/DC converter is widely used in the past decades. Most of the topologies are based on voltage source converter. However, the performance of the voltage source based converter is significantly limited by the bulky energy storage element, the range of soft switching, the leakage inductance of the transformer and so forth. A current fed isolated AC/DC converter is studied...
This paper presents a new design of methodology of the transient voltage clamp (TVC) based on the output impedance. TVC works in parallel with a voltage regulator (VR)'s ceramic cap to achieve a faster voltage regulation without huge bulk capacitor. Hence it acts as a replacement of the bulk cap. Due to the limited control bandwidth, traditional VR could not respond rapidly to the load transient....
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