How to model a hf transformer for dc dc converter

Suppose a model is a dc dc converter with intermediate ac conversion means the system is dc-ac-dc. for that inverter we generally use switches with high frequency. now its output is connected to transformer for boosting. now the question is the output of inverter is of 100khz (supposed) & is fed to transformer. what is the frequency of transformer to be kept.

As of this a hf transformer is required. So how to model a hf transformer in simulink.

can anyone address this issue with step by step procedure

Answer 1

[Shivam Gothi]

Hello @Jyotiprakash,

As per my understanding, you are trying to model a high-frequency transformer that is used in power converters for DC to AC stage. You can model a high frequency transformer by using the block "Linear Transformer" from Simulink library browser.

Open the block parameters for the "linear transformer" block.

• under the "Nominal power and frequency" property, you neeed to enter the rated power of your converter. For the frequency, you can enter the switching frequency of the converter, say 100e3 Hz.
• You can enter the parameters for primary and secondary winding of the transformer under the field :Winding 1 parameters" and "winding 2 parameters".
• If you also want a tertiary winding in your transformer, click on the check-box "Three windings transformer" and enter the parameters of third winding in the provided fields.

You can also refer to the shipped examples that illustrates the usage of "Linear Transformer" block. The examples illustrates the simulation of flyback converter and forward converter.

• Forward Converter: https://www.mathworks.com/help/sps/ug/forward-converter.html
• Flyback converter with Transformer Leakage: https://www.mathworks.com/help/sps/ug/flyback-converter-with-transformer-leakage.html

I hope this answers the question !