An inductive power transfer subsystem for an integrated motor drive is presented in this paper. First, the concept of an integrated motor drive system is overviewed, and its main components are described. Next, the paper is focused on its inductive power transfer subsystem, which includes a magnetically coupled resonant circuit and two-stage energy conversion with an appropriate control method. Simplified complex domain analysis of the magnetically coupled resonant circuit is provided and the applied procedure for its component selection is explained. Furthermore, the prototype of the integrated motor drive system with its control is described. Finally, the prototype based on the gallium nitride field effect transistors (GaN FET) inductive power transfer subsystem is experimentally tested, confirming the feasibility of the concept.

This paper presents modeling methodology and simulation results of failure states and transients in electric vehicle (EV) charging infrastructure for investigation a potentially dangerous phenomenon that might appear during a typical operation. Transients can occur during normal work and during faults in EV Chargers. The trend in the electric cars suggests that in the future ultra-fast chargers would be the dominant one, therefore the focus is put-on high-power chargers (> 50 kW). During failure states of EV chargers' transients occurred in network can impact on other chargers or can propagate along power lines and affect other electrical power equipment. Studies and simulations have been carried out using EMTP-ATP software package on the test model circuit especially prepared for this paper purpose.

This paper presents a single-phase power filter with an energy storage bidirectional DC/DC converter, both of which are equipped with separate capacitor-based DC links that provides good transient response and reduce energy storage capacity. The device is dedicated to the compensation of active power surges generated by nonlinear loads characterized by intermittent operation, where the operating time of a device in relation to the idle time is relatively short. As a compensated and filtered object, the single-phase spot welding machine with a thyristor current controller was assumed. In the case of such devices, the feeder has to be dimensioned for the peak loads, which increase the cost of installation—due to the fact that the used components have to be oversized. The proposed solution can produce measurable economic benefits by reducing the rated power necessary to energize periodically operating loads and improve the indicators of electrical energy quality. An elaborated control algorithm based on a switchable control structure provides a fast and good transient response. The work contains a comprehensive analysis of storage sizing, confirmed by simulation results performed in the Matlab and Simulink environment. Based on the analyses carried out, the laboratory model of the device was implemented and experimental verification performed.

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This paper presents a hybrid switches based on semiconductors and mechanical switches. Devices are dedicated to limitation of adverse effect of capacitive type loads start-up especially in domestic applications, during which high value of inrush current is generated. Two different approaches are studied in the paper, both of them using energy harvesting to operate. The proposed solution combine together several advantages switches, such as: increased lifetime of the mechanical part, small on-state losses, smaller dimensions in comparison to mechanical switches, increased durability on overcurrent states, arc-less switching, or limited switching transients. In presented case solution is adopted as rocker switch of LED light sources.

This paper presents a single-phase power filter with an energy storage bidirectional DC/DC converter. The device is dedicated to the compensation of active power surges generated by nonlinear loads characterized by intermittent operation. As a compensated and filtered object, the single-phase spot welding machine was assumed. The work contains a comprehensive analysis of the device's operation, which enabled the development of storage sizing methodology. The high efficiency of the solution was confirmed during simulation and experimental approach, on especially developed laboratory model. Part 2 of the article presents the results of simulation studies and the results of the experiment.