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.
The efficiency of wireless power transfer (WPT) system is strongly influenced by the lateral misalignment between the transmitting coil and the receiving coil. To solve this problem, this paper proposed a multi-coil switching coupler to increase the coil lateral misalignment tolerance, in which the transmitter consists of thirteen hexagon coils, including three power supply areas and each area consists...
With the development of electric locomotives in the direction of high speed and heavy load, the problems of negative sequence current and excessive neutral section in traction network have become more serious than before. Thus, a hybrid railway power conditioner (H-RPC) is proposed for co-phase power supply system to solve these problems. In this paper, the topology and compensation principle of the...
This paper proposes a contactless power supply system for automated guided vehicles (AGVs) with a topology of two receiving coils. The study features balanced dual output capability for charging motors of the front and the back wheel of AGVs simultaneously, and they can be charged while moving along the rail. The equivalent resonance circuit configuration is established and characteristics of mutual...
This paper discusses the limitations of power line communication (PLC) in vehicles, regarding system loads, transceiver coupling circuits and cable topology. Firstly, ECU input impedances were analyzed to obtain typical termination load conditions in modern vehicle power supply systems. Coupling circuits and cable harness topologies for the power distribution network were proposed, as well. Then,...
We proposed a transcutaneous energy transmission system (TETS) for implantable ventricular assist devices (VADs) in order to improve the quality of life (QOL) of patients. In a conventional TETS, the patient must accurately and tightly fix a rigid coil on his body surfaces because the transmission efficiency remarkably depends on the alignment accuracy of the coil. In order to improve the robustness...
Based on the current development direction of frequency source and its application field, the advantages and difficulties in realization of dual-band frequency source are analyzed in this paper. A dual-band DDS system of digital receiver is chosen as an analytic object. The causes and mechanisms of the crosstalk problem are demonstrated, and a general method for crosstalk optimization is proposed...
In order to address the short distance transmission of inductive coupling wireless power transmission and the poor stability of power supply of near-field resonant wireless power transmission, achieving high-power, efficient and stable wireless power supply for dynamic load on meter level, the cooperative operating mode with tight-strong coupling is proposed and analysed. By establishing unified mathematical...
The implementation of wireless charging for electric vehicles (EVs) in dynamic charging applications such as on highways requires extra hardware in both the vehicle and on the ground to detect the oncoming EV and energise the appropriate ground pads. A detection scheme is proposed in this paper that utilises free resonant currents in the pad windings to detect small changes in coupling between neighbouring...
In this paper, a magnetic coupling mechanism composed of an "n-type" multipolar power supply rail and triple-coil receiver for electric vehicle dynamic wireless charging is introduced. This coupling mechanism is effective to reduce the volume of the magnetic core through the structure of the "n-type" framework. The triple coil receiver is composed of a dual coil and a quadrature...
We designed an auxiliary power supply for medium voltage MMC-converters with system voltages up to 36 kVrms. The system supplies up to 250 W power and is based on a two-stage design. The first stage is an inductive power transfer system that isolates against the system voltage. It is connected to a low voltage DC-supply on ground potential, and shows DC-DC efficiency between 90–95%. Two distinct insulation...
This paper presents a galvanically isolated gate driver system for medium voltage SiC-MOSFETs. A low common mode coupling capacity of 1 pF and good electrical insulation of the gate driver power supply are achieved by using a current-loop AC-bus power supply. The power semiconductor is protected against unintentional self-turn-on by a low resistance gate path that is active while the gate driver is...
In the article two wireless electrical equipment power supply systems were discussed. The systems containing two and three air-core coils placed in various distances from one another were presented. Tests were conducted with the objective to identify the highest efficiency of the system with the transmission of 5 W to the distance of 50 mm. In the article operation of the systems was examined in the...
Inductive Power Transfer (IPT) systems have been proposed for various applications and have been increasingly gaining interest for electric vehicle (EV) charging. Numerous magnetic structures have been proposed for IPT systems for EV charging including structures involving mutually decoupled coils. This paper presents an analytical model of an IPT system composed of a two coil primary pad and a single...
Inductive Power Transfer power supplies for electric vehicles (EV) charging in dynamic applications need to tolerate large variations in coupling and tuning with varying loads. This paper investigates the use of a buck converter to regulate the input voltage to a fixed frequency unidirectional switch push-pull converter to meet the requirements of dynamic charging. The presented circuit is optimised...
The power distribution network on package generally consists of multiple power domains. It is required for each power domain to deliver a robust and stable voltage, which allows the analysis to be done within each domain structure. Therefore, the power noise transfer from a noisier power domain to the neighboring quieter power domain is seldom considered, while it can lead to the performance failure...
Inductive links have been proposed as an intertier interconnect solution for three-dimensional (3-D) integrated systems. Combined with signal multiplexing, inductive links achieve high communication bandwidth comparable to that of through silicon vias. However, being a wireless medium, electromagnetic c oupling between the inductive link and nearby on-chip interconnects can cause voltage fluctuations...
Resonator design methods play an important role in realizing efficient wireless power transfer via magnetic resonant coupling (WPT-MRC) systems. In WPT-MRC systems, transmitting (Tx) resonator arrays are often used to extend the range of the power supply. However, it is difficult to design a receiving (Rx) resonator that prevents significant drops in transfer efficiency across the Tx resonator array...
Transmission lines carrying high-speed I/O signals that traverse through different metal layers in a printed circuit board suffer from return path discontinuities. As a result, significant amount of electromagnetic energy can couple to surrounding circuits and the power distribution network. In this work, we designed three printed circuit board (PCB) test vehicles using different power distribution...
The commercial gate drivers are available upto 6.5 kV IGBTs. With the advances in the SiC, power devices rated beyond 10 kV are being researched. These devices will have use on medium voltage power converters. Commercial gate drivers rated for such high voltages are not available. These power devices have very high dv/dts (30–100 kV/µs) at switching transitions. Such high dv/dts bring in challenges...
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.