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The aim of the present study is to characterize the electrical and electrostatic properties of the four kinds of cereal grains namely barley, durum wheat, soft wheat and impurities. The samples were charged by exposing them to a negative corona discharge generated by a needle electrode, facing a grounded plate electrode. Surface potential decay and electric charge measurements were recorded in order...
Laboratory of Electrification of Industrials Enterprises (LREEI) of boumerdes and CDTA have developed an in-house Helmholtz coil. It will be used as a source of external magnetic field for studying the Negative Bias Temperature Instability (NBTI) degradation mechanisms that can influence Metal Oxide Semiconductor (MOS) devices. This paper describes the different phases of design and construction of...
This paper presents the elaboration of the Au/GaN/GaAs Schottky diodes using the ECR N2 plasma source process at 500°C and its electrical characterization. The substrates of GaAs are n-type doped with Nd= 49×1015cm−3. The thin GaN films are prepared by nitridation of GaAs substrates, using the Electron Cyclotron Resonance Ion Source method at 500°C. The Gold (Au) circular contact is deposed on the...
Passive elements are indispensable in RF systems and are used for matching networks, LC tank circuits, filtering, … etc. Passive elements can be simply classified into distributed elements including transmission lines and waveguides. As the operating frequency moves into the microwave spectrum, the distributed circuits have a higher Q factor, and thus they are usually used for high-frequency applications...
This paper deals with the detection and localization of electrical drives faults, especially those containing induction machines. First, the context of the study is presented and an Extended Kalman Filter is described for induction machines fault detection. Then the modeling procedure under faulty conditions is shown, and the machine diagnosis methods are developed. The proposed diagnosis approach...
In this paper, design considerations on the three phase PWM rectifier are presented. New methods, to compute the value assigned to the AC source voltage and the line filter, are given. The design approach of the AC source voltage is based on the value affected to the DC link voltage and power transfer. This approach leads to an optimal value of the source voltage ensuring a maximal power flowing to...
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