## Transformer design

There are two main losses on the transformer. a) Core loss and b) Copper loss.

__Core loss__: Core loss is due to the flux swing. Higher the Delta flux density (B), higher is the loss.

__Fringing loss__:- This is seen in flyback transformer design and is caused by the fringing field

__Copper loss__:- Copper loss is mainly due to I^2 *R loss and the proximity loss.

(I^2) * R Loss :- There are two main elements for the I^2 *R loss. It is due to DC current and the AC current through the transformer winding. To minimize the AC loss, one can use multiple strands of wire bundled in a defined way with each wire less than the skin depth. However this does not do any good for the DC loss. The losses are not very much reduced if you use 90 magnet wires in parallel compared to 100 wires in parallel. One has to calculate the AC loss and DC loss in the wire and use the right wire gauge.

__Proximity loss__:- Proximity loss occur due to two layers winded adjacent to each other. To minimize proximity loss one can have one layer for each winding.

__Winding structure__:-

a) Interleaving :- To minimize leakage inductance, one can sandwich secondary winding between the primary winding. this configuration decreases the leakage inductance but increases the capacitance.

b) High current application :- In high current applications, secondary is winded first then the primary. This configuration decreases the copper loss and is a significant improvement when the output current is high.

## Demo software

We are in a process of developing a software for transformer design. This software will be available with the excel file with the database for the cores

We should be have the software for sale within 3 months.

(if you are interested in buying the software please email us so we can give you a discount when the product is released)

We should be have the software for sale within 3 months.

(if you are interested in buying the software please email us so we can give you a discount when the product is released)