الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Electrical machines causes excessive harmonic current and undesirable voltage distortion in the electrical distribution system and causes a malfunction of other equipment, especially when an adjacent manufacturing facility with extensive electronic controls exist. With the presence of harmonics, power transformers generate additional power losses are show in such electrical equipment and hence extra heating in the phase winding.
In this study, various traditional and modern solutions were presented. The passive filter method and active filters were chosen as a method of treatment. This thesis also explain the effectiveness of using filters with PWM to control the effective filter current.