@ARTICLE{Rąbkowski_J._GaN-based_2020, author={Rąbkowski, J. and Król, K. and Zdanowski, M. and Sochacki, M.}, volume={68}, number={No. 4 (i.a. Special Section on Advances in Electrical Power Engineering)}, journal={Bulletin of the Polish Academy of Sciences Technical Sciences}, pages={785-792}, howpublished={online}, year={2020}, abstract={This paper describes practical issues related to control of the active power buffer (APB) developed for a 2 kVA single-phase inverter. The buffer is designed using the latest GaN HEMTs controlled with triangular current mode to reduce switching losses, however, the switching frequency should be limited to 1 MHz. In the case of the presented analogue-digital controller, frequency is influenced by a reference current of the APB and circuit. Therefore, the operation at start-up and shut-down is especially challenging. A modified control algorithm that also includes pre-charging and discharging process of the energy buffer is presented and experimentally verified by series of tests of the 2 kVA GaN based inverter with the APB.}, type={Article}, title={GaN-based soft-switched active power buffer operating at ZCS – problems of start-up and shut-down}, URL={http://journals.pan.pl/Content/117257/PDF/15_785-792_01447_Bpast.No.68-4_27.08.20.pdf}, doi={10.24425/bpasts.2020.134175}, keywords={GaN, power inverter, active buffer}, }