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.
This paper presents the design, implementation and experimental results of an energy harvesting system to extract energy from power transmission lines. The energy is extracted from a high permeability core clamped on a high alternative current cable. A coil wound on the magnetic core can harvest energy effectively from the power line when the core is operating at the non-saturation region. Little...
A fault-tolerant direct torque control (DTC) strategy for a brushless dc (BLDC) motor with a single sided matrix converter (SSMC) for an electrohydrostatic actuator system in aerospace application is proposed in this paper. The voltage is divided into seven levels, a torque hysteresis control is applied to each phase, voltage of different levels are provided to the motor to control the torque. A Matlab/Simulink...
The transverse-flux linear switched-flux permanent magnet machine is investigated by 3-D finite-element analysis in this paper. The topology of the machine, as well as the machine operation principle, is introduced first. In order to improve the thrust force performance of the machine, two aspects are analyzed. One is the average thrust force, which is maximized by optimizing the mover stack length...
Memory motors [1] [2] equipped with either single low-coercive force (LCF) or hybrid magnets have been extensively investigated due to the elimination of the associated excitation loss during the flux adjustment. Thus, they enable high efficiency operation within a wide range of speeds and loads. Very recently, switched-flux topologies that feature high torque density, simple rotor, and expedient...
Resistive random access memory is one of the most promising non-volatile alternatives to current technologies, such as Flash, due to its simple sandwiched structure, low power consumption, high speed and good endurance1,2. In many cases, the mechanism of resistive switching is believed to be the formation and partial dissolution of nanoscale conductive filaments (CFs) during the set and reset process...
In a challenging environment where the electronic marketplace is transparent and competitors are only a click away, web retailers are more vulnerable to customer attrition. Despite that customer retention was widely regarded central to business survival and growth and some studies attempted to find factors that influence customer retention, few measured customer retention quantitatively. Businesses...
Nuclear fusion reactors, such as the Tokamak in the International Thermonuclear Experimental Reactor (ITER) project, usually involve extremely sophisticated high voltage power supply systems, which provide exciting research challenges. In the short term, the major challenges in power supplies of the ITER and other fusion reactors include 1) fast current control of Vertical Stabilization (VS) coils;...
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.