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Nowadays, Radio Frequency Identification (RFID) technology has been widely employed in the fields of object positioning, tracking and monitoring. However, there are a large number of redundant data generated in RFID systems due to duplicate detection and cross detection. Since RFID data is usually streaming, uncertain and mobile data, traditional static data and data stream filtering strategies cannot...
This paper presents a novel dual-stator hybrid excited synchronous wind generator (DSHESG). The structure characteristics are presented and no-load magnetic field is computed by 3-D finite element method. Static characteristics including magnetic flux density, EMF, inductances are analyzed. A closed-loop control system for field windings using PWM method is built on the basis of mathematical model...
Permanent magnet actuator has such advantages as free-maintenance and high reliability. In this paper, a new type of permanent magnet actuator used for lower voltage circuit breaker is analyzed based on 3-D finite element method. Typical flux density distributions are computed with different currents. Two control strategies, open-loop control and closed-loop control, for the permanent magnet actuator...
The structure and operation principle of a novel hybrid excitation claw-pole synchronous machine (HECSM) are introduced. The field-control capability based on the equivalent magnetic circuit method is analyzed. A 3D finite element analysis (FEA) is used to analyze no-load magnetic field distributions, air-gap flux, phase flux linkage and back EMF variation for different field currents. Furthermore,...
SF6 gas insulated transformer (GIT) has the advantages of nonflammable and non-explosive. However, there is a deviation in flows near the coils, which results the coil temperature overheat. In order to remove the deviation of flow, it is necessary to use force-directed-gas duct cooling system. In this paper, the force-directed-gas duct heat fluid coupled finite element method is presented based on...
Alternating current (AC) permanent magnet (PM) contactor is a new type of contactor, which coil does not consume energy during its working course. This paper proposes a new structure contactor and analyzes magnet field distributions of PM arrangements both on stator and on armature based on finite element method. The computed results of two arrangements are almost the same for making course, but for...
A novel dual-stator hybrid excited synchronous claw-pole generator (DSHESG) is proposed in this paper. The structure characteristics are described and the operation principle is introduced. Using finite element method, the field-control capability of DSHESG is studied. Some static characteristics including air gap flux density, no-load flux linkage, back-EMF, self-inductance of field windings, and...
The science process is a process to solve a complex scientific problem which involves large numbers of resources and scientists. Organizing science processes in workflow forms and deploying such scientific workflows in grid environments could provide the effective process management and resource sharing so as to achieve the automatic performance of science processes. However, most current workflow...
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