| Summary: | 碩士 === 國立臺灣科技大學 === 電機工程系 === 91 === This thesis is to study the magnetic-field shielding methods caused by electric power lines. The finite element based simulation package, FLUX3D, can be used to establish the simulation model and to evaluate the magnetic-field shielding effect of aluminum plates, silicon-steel plates and Amumetal. It is desired to reduce magnetic-field interferences due to three-phase currents. For the improvement-scheme of power frequency magnetic-field, we can concentrate power lines arrangement and have suitable phase arrangement. So that the magnetic-field flux density due to three-phase current can be canceled by each other. Finally, we can use appropriate metal plates to shield magnetic-field, and to reduce magnetic-field interference furthermore. We should find the better combination shielding methods of aluminum plates, silicon-steel plates and Amumetal.
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