RT - Journal Article
T1 - Mathematical Proof for the Minimized Stray Fields in Transformers Using Auxiliary Windings Based on State Equations for Evaluation of FEM Results
JF - IUST
YR - 2010
JO - IUST
VO - 6
IS - 1
UR - http://ijeee.iust.ac.ir/article-1-258-en.html
SP - 62
EP - 69
K1 - Characteristics Equation
K1 - Current Injection Transformer
K1 - Eigenvalues
K1 - Finite Element Method
K1 - Pulse Transformer
K1 - Superconductor Transformer
K1 - State Equation
K1 - Stray Fields
AB - Stray magnetic field is one of the main issues in design of transformers, since it causes non-ideal behavior of transformers. One of the techniques is usually adopted to mitigate the unwanted stray magnetic field is the use of auxiliary windings creating a magnetic field opposite to the incident one giving rise to the reduction of the total magnetic fields. This paper presents a new mathematical proof for optimized parameters such as connection resistance and leakage inductance of the auxiliary windings based on state equations. Some numerical examples for various types of practical transformers are given to demonstrate the validity of the presented mathematical proof and a comparison is made with the results of transformers behavior which is obtained with the help of finite element method. The proposed method is successfully implemented on three different types of transformers: current injection transformer, pulse transformer and superconductor transformers.
LA eng
UL http://ijeee.iust.ac.ir/article-1-258-en.html
M3
ER -