Flyback transformer one winding primary side and two winding secondary side

transformer

I have chosen a transformer from We-online type 750032051-1
and I am working on a project that input voltage 1000 vDC and output voltage 24 vDc.
I have some inquiries about this transformer:
1- how is it connected?
2- What are the inductance values of all three windings?
3- What is the coupling factor?

If i am not mistaken, the secondary side winding are connected in parallel and the values for praimary winding is 10mH and secondary winding 100µH each.
K= coupling factor is 0.994
but I am not sure

Best Answer

The ratio is 10:1 for one low voltage winding (or two in parallel) to the high voltage winding. (I'll avoid using "primary"/"secondary" since your definition is the opposite of the datasheet).

You have two choices- 10:1 with windings in parallel and 5:1 with windings in series. You probably want the higher ratio.

I get 0.997 for the coupling coefficent:

\$k = \sqrt{1 - \frac{L_{LEAK}}{L}}\$

The inductance of one low voltage winding (or two in parallel) is 10uH. The inductance of the high voltage winding is \$N^2\$ higher, or 1mH.