Applied electromagnetics and electromagnetic compatibility by Dipak L. Sengupta

By Dipak L. Sengupta

Utilized Electromagnetics and Electromagnetic Compatibility offers with Radio Frequency Interference (RFI), that is the reception of undesired radio indications originating from electronic electronics and digital apparatus. With modern-day speedy improvement of radio communique, those undesired signs in addition to indications because of usual phenomena reminiscent of lightning, sparking, and others have gotten more and more very important within the basic zone of Electro Magnetic Compatibility (EMC). EMC may be outlined because the strength of a few digital apparatus or process to be operated at wanted degrees of functionality in a given electromagnetic setting with out producing EM emissions unacceptable to different structures working within the region.

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25 in) solid ferrite tile at 0Њ and 45Њ incident angles. t = a + 1−g g 1 + − 2 a a 0 and impedance and propagation constant [for details, see (3,6,16a)]. Figure 1 shows the reflectivity of a solid ferrite tile and the material properties are given in Table 1. The figure shows that the tile performs very well below 600 MHz, but above 600 MHz, the tile performance deteriorates. The higher frequency (Ͼ600 MHz) performance is improved by using so-called ‘‘ferrite grids’’. A ferrite grid (or waffle) is shown in Fig.

Mat. Eng. Performance, 1 (2): 236–244, 1992. 12. Y. Alinejad-Beromi A. J. Moses T. Meydan New aspects of rotating field and flux measurement in electrical steel, J. Magn. Mag. , 112: 135–138, 1992. 13. A. J. Moses Effect of stresses on magnetic properties of siliconiron laminations. J. Mat. , 9: 217–222, 1974. 14. A. J. Moses P. S. Phillips Some effect of stress in Goss-oriented silicon iron, IEEE Trans. , 14: 353–355, 1978. 15. D. A. Ball H. O. Lorch An improved thermometric method of measuring local power dissipation, J.

2 Eddy Current Losses Figure 3. Deterioration of power loss and permeability of grainoriented silicon steel with direction of magnetization relative to the rolling direction. Figure 1. Variation of properties of iron alloys with silicon content. Figure 2. Schematic representation of grain-oriented electrical steel sheet. P. Goss). 2% silicon by weight. A crucial factor in developing good magnetic properties is to control the impurity level during the steel production process. Certain impurities such as manganese sulfide (MnS) or aluminum nitride (AlN) are needed in the development of the [001](110) texture so they must be removed in a subsequent anneal.

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