Bm value is the index with core main material, cold rolling electric steel piece Bm=1.7-1.8T, electric steel of specific heat make friends piece Bm (1.4-1.45T) get greatly much, this uses the account of cold rolling electric steel now namely.

In addition, az also is the basiccest parameter of transformer, once the size because of core cut area is affirmatory, also decided the internal diameter of winding and the v/LIT all over the ground number of former, auxiliary winding. The measure that affects whole transformer thereby and each are main performance data. Its correct make choice of still involves the cupreous iron that uses up to transformer material to compare, it is the main factor that affects a design.

Analyse from transformer principle knowable, below the condition with maintain magnetic flux density certain, az adds a general to make winding circles number decreases, those who change character, core material uses up increase will make of lead material use up decrease, make value of short circuit impedance, laden loss is reduced; If reduce core cut area, can reach opposite conclusion.

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