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Search results for: frequency
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Year: 2009, Volume: 9, Issue: 2
... stator flux vector. Thus, the machine torque can be has some drawbacks such as operation with variable regulated to generate the stator angular speed, which becomes switching frequency and large torque ripple, due to the a command signal and permits to overcome the problem of its estimation. Furthermore, with the combined control methods, ...
Year: 2009, Volume: 9, Issue: 2
... ensure a closed loop load current. Digital Object Identifier 10.4316/AECE.2009.02004 23 Advances in Electrical and Computer Engineering Volume 9, Number 2, 2009 ¾ The switching frequency fs=ωs /2π must have a 1 1 value twenty times higher than the maximum of cos(3ωo t)+ cos(3ωi t) ...
Year: 2009, Volume: 9, Issue: 2
... compressor, data given in fixed a.c. coils 10 are provided, which operate as a primary the literature [2, 3]. The rated voltage and frequency is coil of a transformer and the moving ring operates as a chosen to operate in our country low voltage network. secondary coil. The magnetic circuit of ...
Year: 2009, Volume: 9, Issue: 2
... by eddy currents and active power P1 absorbed by the motor, according to the IEC hysteresis. The iron losses depend strongly on the standard [11]: frequency. Since the frequency of the rotor quantities (f2) Ps= 0.5%. P1 (12) depending on the machine slip (s) by ...
Year: 2009, Volume: 9, Issue: 2
... quasi-stationary regime. [4-5] behavior into the soil. All these calculations are more or less The soil structure is an important parameter that affects accurate for basic frequency, but not so exact for higher the level of the interference problem. The paper investigates harmonics. [5] 82 Digital Object Identifier 10.4316/AECE.2009.02013 ...
Year: 2009, Volume: 9, Issue: 2
... 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 minutes. After the samples digestion, the contain instrument incorporates two microwave generators is transferred to ...
Year: 2009, Volume: 9, Issue: 2
... power plant has significant effect on systems. The conventional risk evaluation methods are the the risk assessment. probability convolution, series and parallel networks, Markov equations and frequency duration methods [1]. II. IMPROVED RISK ASSESSMENT METHOD They can be directly applied to simple cases. For large-scale MCS is a well-known risk evaluation ...
568. Radiofrequency Field Distribution Assessment in Indoor Areas Covered by Wireless Local Area Networks
Year: 2009, Volume: 9, Issue: 1
... ones, with the exception while in IEEE 802.11g Orthogonal Frequency Division where we otherwise specify. The AP settings ... and Computer Engineering Volume 9, Number 1, 2009 Radiofrequency Field Distribution Assessment in Indoor Areas Covered by Wireless ... aim of present paper to assess the E-field level of frequency-selective measurement system and identifying the correct settings for an ...
569. Influence of Different Types of Metal Plates on a High Frequency RFID Loop Antenna: Study and Design
Year: 2009, Volume: 9, Issue: 1
... , Number 2, 2009 Influence of Different Types of Metal Plates on a High Frequency RFID Loop Antenna: Study and Design Kevin D'HOE1, Anneleen Van NIEUWENHUYSE1, ... " IEEE Antennas and Propagation [18] K. Finkenzeller, RFID Handbook: Radio-Frequency Identification Society, Volume 4, 2005, pp. 410 – 413. ...
Year: 2009, Volume: 9, Issue: 2
... the filter is restricted to the that can comply with the conducted emission regulatory fundamental frequency. So, flat frequency response, low requirements without the use of some ... used. The LISN assures definite The most part of the manufacturers give the insertion radio-frequency impedance in a test point, in the same time loss of EMI filters ...
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