The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
A high static gain DC-DC converter based on the CUK topology is presented in this paper. The proposed converter presents an input and output current source characteristic allowing the integration of this converter with a second stage with input current source characteristic. Some applications of the proposed converter are renewable power sources and grid-tie systems. The theoretical and experimental...
This paper presents a relational analysis between the total harmonic distortion of the current in controlled rectifiers and the projected inductance value. A mathematical description of the Total Harmonic Distortion (THD) of the input current waveform simplifies the analysis of rectifiers, and especially the complex waveforms involved. The study of harmonic distortion aims to contribute to the development...
A snubberless current-fed push-pull dc/dc voltage doubler is proposed with zero voltage switching (ZVS) turn-on of low voltage current-fed devices by using the parasitic resonance between the drain-source capacitance of MOSFETs and the leakage inductance of the high frequency transformer. Secondary modulation helps reduce switching losses further by obtaining zero current switching (ZCS) turn-off...
In this paper, a 500 W, 400 V to 48 wireless power transfer system for vehicle battery charging is analyzed, designed and implemented. Series-series resonant topology is used due to ease of analyze and control. The secondary bridge rectifier is replaced by a sync rectifier consists of four MOSFET in a full bridge configuration in order to reduce conduction losses on rectifier. An efficiency of 92...
A family of four quadrant DC/DC converters is presented in this paper. Compare with existing four quadrant DC/DC converters that have been introduced in literature, the proposed converters have lower number of components. There are two bidirectional switches, two coupled inductors and one capacitor in proposed converters that can lead to lower cost and also smaller occupied space. The proposed converters...
A new isolated bidirectional full bridge buck-boost converter with non dissipative clamping circuit provides high conversion ratio in the boost mode, maximum power output, and soft switching capability at both buck and boost conversion is described in this paper. The proposed topology with LCD clamp has none of the drawbacks available with other bidirectional converters comprises of complex snubber...
Energy router is defined and developed along with the new concept of energy internet. This paper presents an AC-DC hybrid multi-port energy router for power distribution networks, which consists of high voltage AC port, low voltage AC port and low voltage DC port. Based on the description of its circuit topology and control strategy, the design of the main parameters is analyzed in details. The relationship...
Applications using dielectric electro-active polymers (DE-EAP) tend to grow quickly due to their most interesting feature: when activated, displacements can reach ranges as high as 200–300%. How interesting this may be, the voltage to be applied is very high — 5 kV — and therefore difficult to handle and manage. Inductive contactless power transfer (ICPT) systems are elegant solutions to completely...
There is a need for microinverters that support non-unity factor operation in response to recently issued regulations. In this paper, a topology is proposed for a low cost and efficient single phase microinverter that can supply reactive power. The microinverter is controlled to ensure smooth current flow to/from the grid where a three-stage operation is used. Despite their low complexity, the proposed...
Battery charging and discharging requires a high-performance power electronics based converter interface namely with electrical isolation, high efficiency and fast dynamics. This paper analyses and discusses the battery interfacing using the dual active bridge with phase shift control for a bidirectional DC-DC converter. This converter typically integrates systems for vehicle to grid and grid to vehicle...
This paper proposes a novel inductive contactless energy transfer system for residential distribution networks. The system is based on a resonant inverter with sliding transformers, allowing high flexibility (the connection point of the loads is movable) and high safety (electrical shocks are avoided). A new resonant topology for driving the sliding transformers is proposed which behaves as an AC...
This paper presents a detailed state-space modeling of a Modular Multilevel Converter (MMC) in combination with line frequency transformer (LFT). The classical MMC topology is compared with the recently proposed Open-End Winding MMC (OEWMMC) topology, which integrates the LFT in the converter arm. The line frequency transformer parameters are added in the model, some of which are often neglected in...
Previous work reveals that the magnetically coupled resonant (MCR) wireless power transfer (WPT) technology is efficient and practical for mid-range wireless energy transmission, able to handle nontrivial amount of power. This paper presented an equivalent analytical model for MCR WPT system to incorporate spatial misalignments between the transmitting coils and receiving coils. The mutual inductance...
A novel interleaved flyback converter with leakage energy recycled is proposed. The proposed converter is combined with dual-switch dual-transformer flyback topology. Two clamping diodes are used to reduce the voltage stress on power switches to the input voltage level and also to recycle leakage inductance energy to the input voltage and capacitor. Besides, the interleaved control is implemented...
The Modular Multilevel Converter (M2LC) is a well-known modular multilevel topology. This paper proposes a novel branch inductor coupling and compares it to the center-tapped inductor and the standard non-coupled inductor topology. The proposed coupling has a significant influence on the inductor and converter dimensioning. Its properties make it especially well-suited for use in M2LC single-to-three-phase...
This paper investigates the topology of 20MVA IGCT-based high power NPC/H-bridge inverter. The detailed structure design is presented. The commutation processes of IGCT equivalent circuit and NPC leg are analyzed, which are influenced by the snubber circuit and the characteristic of diode and IGCT. The system simulation model is built in PSIM. The simulation and experimental results validate the correctness...
This paper investigates design procedure of modular multilevel converter (MMC) in active front-end (AFE) mode of operation. The design in performed trying to minimize the amount of passive elements including arm inductances and submodule capacitances. This has been done using basic controllers needed for operation of MMC in AFE mode, without employing any additional controller in the circuit. In other...
Transformer based Z-source (trans-Z-source) inverters are recently proposed by extending the traditional Z-source inverter with higher buck-boost capability as well as reducing the passive components at the same time. This research work proposes a new topology for high-boost trans-Z-source inverter. In traditional trans-Z-source inverters for high boosting voltage, low modulation index is required,...
For the energy storage is so large, heavy and not easily integrated, economical AC/AC converters, without DC energy storages, are used to dynamic voltage restore. The virtual rectifying and inverter topology, whose structure is compact and can naturally current commutate, is easily controlled and more reliable. Since that the dynamic voltage restorer (DVR) has strict demand of quick dynamic responses...
Two different power circuit structures have been proposed for a five-level hybrid active neutral-point-clamped (5L HANPC) converters. In order to reduce the size/weight of the converter system, PCB-mounted film capacitors were selected as DC-link banks. The two arrangement of the existing power semiconductor modules are compared in this paper. The comparison includes dimension, weight, parasitic parameters,...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.