Hi all,
I am trying to build a small signal model of a buck converter in order to design a voltage mode controller. I have it on good authority (Author: Mohan = First Course in Power Electronics) that I must use an element from the PSpice schematics library to simulate the switching power pole.
This element is named Ideal_Transformer _CCM. The schematic and error messages I receive (in the message viewer and the probe windows respectively) are attached as nerdstuff file.
It generally tells me that the transformer ports are not connected to anything and it looks on the schematic like it is. Though when the block is double clicked, symbols for each port within look unconnected and do not respond to any configuration attempted!
I have also made the model in PSpice building my own ideal transformer but have not gotten satisfactory frequency response from this. The dB level is offset by approximately 25dB. I have attached the model and frequency response as aptly named files.
If anyone can explain firstly how to make the model work with the ideal_transformer_CCM i would greatly appreciate it. However if an explanation of why the other model is offset would also be appreciated.
Thanks! bigm79
I am trying to build a small signal model of a buck converter in order to design a voltage mode controller. I have it on good authority (Author: Mohan = First Course in Power Electronics) that I must use an element from the PSpice schematics library to simulate the switching power pole.
This element is named Ideal_Transformer _CCM. The schematic and error messages I receive (in the message viewer and the probe windows respectively) are attached as nerdstuff file.
It generally tells me that the transformer ports are not connected to anything and it looks on the schematic like it is. Though when the block is double clicked, symbols for each port within look unconnected and do not respond to any configuration attempted!
I have also made the model in PSpice building my own ideal transformer but have not gotten satisfactory frequency response from this. The dB level is offset by approximately 25dB. I have attached the model and frequency response as aptly named files.
If anyone can explain firstly how to make the model work with the ideal_transformer_CCM i would greatly appreciate it. However if an explanation of why the other model is offset would also be appreciated.
Thanks! bigm79
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