Open Access3D model for calculating the impedance of the transformer of the inverter power source of the resistance welding machine
Author(s) -
Liudmila I. Sakhno,
Olga I. Sakhno,
Mikhail S. Krylov,
D. I. Likhachev
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/643/1/012033
Subject(s) - inductance , transformer , transformer types , linear variable differential transformer , delta wye transformer , transformer effect , electrical impedance , energy efficient transformer , quarter wave impedance transformer , distribution transformer , electromagnetic coil , rotary variable differential transformer , leakage inductance , electrical engineering , equivalent series inductance , equivalent circuit , engineering , impedance matching , damping factor , voltage
3D model for calculating the short circuit impedance and inductance of the secondary windings bars of a welding transformer are given. An example of calculating these parameters for a transformer with a rated current of 7 kA in the frequency range from 0 up to 1000 Hz are considered. The accuracy of these parameters and calculation time are discussed. The results of transformer impedance calculations using 2D and 3D models are compared. The inductance of the transformer bars is about 70% of the transformer short-circuit resistance.