#smps #transformer #winding #calculation
In this video i explained practical calculation of transformer winding turns for any (smps) switch mode power supply. after watching full video you will understand all design steps.
Primary Turns
The standard formula for calculating the primary number of turns is given below:
N(prim) = Vin(nom) x 108 / 4 x f x Bmax x Ac
Here N(prim) refers to the primary turn numbers.
EFD and EPC cores are used when a low profile is required.
EE and EF are good choices and generally used with either vertical or horizontal bobbins (vertical bobbins are good when footprint space is at a premium).
ETD and EER cores are usually larger, but have a wide winding area, which makes them particularly good for higher power designs and multiple output designs.
PQ cores are more expensive but take up slightly less PC board space and require less turns than E cores.
Larger core size will be needed for a margin wound type transformer than for a triple insulated type to allow room for the margins.
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