Comparison between measured and computed magnetic flux density distribution of simulated transformer core joints assembled from grain oriented and non-oriented electrical steel

摘要

The flux distribution in an overlapped linear joint constructed in the central region of an Epstein Square wasudstudied experimentally and results compared with those obtained using a computational magnetic fieldudsolver. High permeability grain-oriented (GO) and low permeability non-oriented (NO) electrical steelsudwere compared at a nominal core flux density of 1.60 T at 50 Hz. It was found that the experimental resultsudonly agreed well at flux densities at which the reluctance of different paths of the flux are similar. Also itudwas revealed that the flux becomes more uniform when the working point of the electrical steel is close toudthe knee point of the B-H curve of the steel.