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In the paper the results of experimental research on residual current protective devices with different design of the release system are presented. The application of a summing transformer and a power adjustment system in the secondary circuit affects the release frequency range. In the circuits of installations, where due to the specific features of the supplied devices, there are some current deformations...
The paper presents the method of digital modelling of process of switching on by vacuum switch in capacitive circuits. Currently, there are few descriptions of vacuum switch models used for capacitive circuits switching on. More often researchers focus on vacuum switch models used for switching of the circuits (also previous works of the Authors) and even more often models used for switching of the...
This article describes the inductive power transfer system for unmanned aircraft vehicles (IPT4UAV) to charge lithium polymer battery. IPT4UAV is fed by a single-phase network. The structure of the system construction, control, air transformer design and the results of experimental research were presented.
This paper presents a 325 to 24 V, 1 kW isolated uni-directional DC-DC converter, build with Gallium Nitride (GaN) High-Electron-Mobility Transistors (HEMTs) switching at frequencies of up to 250 kHz. The system is designed by means of LTspice simulations using precise device models. Primarily, a problem of overvoltage across HEMTs is studied, optimal selection of RC snubbers is presented and, finally,...
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