EI-core Transformer Design Calculator

EI-core Transformer Design Calculator

DESIGN PARAMETERS Center leg l : mm in Stack thickness k : mm in Window width j : mm in Window hight i : mm in Flux density B : gauss tesla max/sqr-in OTHER DESIGN PARAMETERS Current density S : sqr-mm/A cmil/A Frequency f : Primary voltage Vp : Secondary voltage Vs : Voltage wave-form : sine-wave square-wave modified sine-wave Fill factor K : ******************************************************************** ******************************************************************** DESIGN RESULT Number of turns (primary)= Cross section of primary wire (sqr-mm)= Number of turns (secondary)= Cross section of secondary wire (sqr-mm)= Power (VA) = Hint on wire selection: In practice, some wire gauges are so thick and are almost impossible or very difficult to wind especially when the winding is being done manually. The best practice is to use multiple smaller wires that can be wound easily and with total cross section equals the calculated value. For instance, if calculated area of the winding wire gives 16.40625square-mm, the corresponding AWG is ‘5’ with diameter 4.621mm. Feel the wire with your hand, you will agree with me that it won’t be easy to wind. Instead, 5 strands of AWG ‘12’ with diameter 2.053mm and cross section 3.31square-mm that give total area of 16.55square-mm will make a good sense. AWG selector will help you select the right wire for yor calculated value above.