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Search results for: electromagnetic
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Year: 2009, Volume: 9, Issue: 2
... . The production of electric motors with high energy Taking into account all the specific physical symmetries, efficiency generally leads to the increase of material costs the 2D plane-parallel electromagnetic field computation due to: larger weight of conducting materials by adopting domain is reduced to ¼ of the cross-section of the induction smaller current densities, use of ...
Year: 2009, Volume: 9, Issue: 2
... p – number of pole pairs, ωs and ωm – stator and rotor angular speed, ωsl – slip angular speed (ωs – ωm), Tem – electromagnetic torque. Figure 1. Closed-loop control of stator flux. It is known that the stator field-orientation method is based on the alignment of stator flux vector with ...
Year: 2009, Volume: 9, Issue: 2
... Radu MUNTEANU Technical University of Cluj-Napoca, C. Daicoviciu str. 15, Cluj-Napoca, ROMANIA Ioan.Vadan@eps.utcluj.ro Abstract — The paper presents the design and Finite Element electromagnetic type (fixed coil and moving magnet). (FEM) analysis of a Linear compressor of voice coil type The present study proposes a new solution of ...
Year: 2009, Volume: 9, Issue: 2
... and 3 mL HCl). For the liquid II. II. MICROWAVE PRINCIPLES samples, in the quartz vessels, are introducing 25 water Microwaves are defined as electromagnetic radiations samples and 6 ml HCL and 2 ml HNO3. The total digesting within a frequency range from 300 MHz to 300 GHz. The time is 15 ...
Year: 2009, Volume: 9, Issue: 2
... switches SW1 and SW2, made with two thyristors mounted in antiparallel, an autotransformer ATR, which supplies with variable voltage the current source CS. This is an electromagnetic device with variable input voltage and high variable output current which flows through the traditional fuse under test F, or fuse with controllable fusing effect FCF. The ...
186. Radiofrequency Field Distribution Assessment in Indoor Areas Covered by Wireless Local Area Networks
Year: 2009, Volume: 9, Issue: 1
... Iulian BOULEANU2, Robert HELBET2 1 Nicolae Balcescu Land Forces Academy, Sibiu, Romania 2 Communication and Information Training Center – Sibiu, Romania simo.miclaus@gmail.com Abstract — Electromagnetic environment becomes day by day system configuration and on the actual traffic in the network more congested. Radio communication systems in the short [1 ], [ ...
Year: 2009, Volume: 9, Issue: 2
... power to the load, so the EMI filter designer is inherent filtering, and so can obviate the need for an "intentional" filter. Mains EMI (electromagnetic interference) not concerned with them. filters carry potentially high currents at dangerously high To summarize, the requirements of the conventional, or voltages, so care ...
188. Influence of Different Types of Metal Plates on a High Frequency RFID Loop Antenna: Study and Design
Year: 2009, Volume: 9, Issue: 1
... Its Application to an Antenna Input Impedance Automatic Magnetic Field Reduction of Nonferrous Metal Shields," IEEE Matching System," IEEE Transactions on Microwave Theory and Transaction on Electromagnetic Compatibility, Volume 39, Issue 1, Techniques, Volume 52, Issue 2, Feb. 2004, pp. 489 – 497. Feb. 1997 ...
Year: 2009, Volume: 9, Issue: 1
... reluctance motor. 79 Advances in Electrical and Computer Engineering Volume 9, Number 1, 2009 IV. MOTOR GEOMETRY aligned position, while subsequent poles are shifted Classical electromagnetic design of the motor [4] directs respectively with multiple of (½ a) (see table I for a). towards stator geometry as shown ...
Year: 2008, Volume: 8, Issue: 2
... Nuclear quadruple resonance, Analog-to- digital converter, Digital-to-analog converter, Microcontroller, Stepper motor I. INTRODUCTION Nuclear quadruple resonance (NQR) is a resonance absorption of electromagnetic energy in crystals, caused by Figure 1. Measuring LC circuit with the combined capacitor. transitions between power levels, appearing as a result of interaction of ...
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