| |
CHARACTERIZATION OF TRANSFORMER CORES USING A NEW MUTUAL IMPEDANCE FORMULA
| [View]
[Download]
|
| Author(s) |
W. G. Hurley; P. S. McNamara |
| Abstract |
This paper describes a new method for calculating mutual and leakage impedances in transformer windings. The new formula is derived from a solution of Maxwell's Equations for coils on ferromagnetic cores. The frequency dependence of eddy current losses in the core are taken in to account and represented by the resistive component of the impedance formula. The new formula is based on the physical dimensions of the windings and core and also the magnetic permeability and electrical resistivity of the ferromagnetic core. Equivalent resistivities are derived for non-homogeneous laminated and powdered iron cores. It is shown that any core can be characterized by its magnetic permeability and equivalent electrical resistivity. The new methodology overcomes the traditional assumptions of ideal core magnetic material and negligible core losses. |
| Download |
| Filename: | Unnamed file |
| Filesize: | 3.743 MB |
|
| Type |
Members Only |
| Date |
Last modified 2019-08-13 by System |
| |
 |