transformer modelling
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- KVRAF
- 2256 posts since 29 May, 2012
Looks like this thread is lost in the overall complexity of analog circuits.
What BertKoor had said in the very beginning is on the right track. It is necessary to have a look at what a transformer does in a particular circuit instead of delving into details. For a particular example you could examine the thread Aleksey Vaneev links from here http://www.kvraudio.com/forum/viewtopic ... 3&t=469008
While he probably does not (or did not initially thought that) his model corresponds to a tube+transformer driven speaker instead of just being a triode model, to me this looks like the only way what he has done makes sense, as through the whole thread we could not find any other reasonable coresspondance between any other valve circuit and this particular model that he thought sounded nice.
edit: Also somewhere in the very beginning of the thread JCJR has a nice summary:
What BertKoor had said in the very beginning is on the right track. It is necessary to have a look at what a transformer does in a particular circuit instead of delving into details. For a particular example you could examine the thread Aleksey Vaneev links from here http://www.kvraudio.com/forum/viewtopic ... 3&t=469008
While he probably does not (or did not initially thought that) his model corresponds to a tube+transformer driven speaker instead of just being a triode model, to me this looks like the only way what he has done makes sense, as through the whole thread we could not find any other reasonable coresspondance between any other valve circuit and this particular model that he thought sounded nice.
edit: Also somewhere in the very beginning of the thread JCJR has a nice summary:
If the transformer output's load is reactive, then the load could "bounce back" and affect the behavior of the transformer, and this effect could pass upstream thru the transformer and possibly affect the circuitry upstream of the transformer.
For instance a tube guitar amp output transformer, the signal from the transformer interacts with the reactance of the speaker, and the speaker interacts with the reactance of the air and the cabinet, so the air and cab "push back" on the speaker, and the speaker "pushes back" on the transformer, and the transformer "pushes back" on the tube output stage. Then the tube output stage reacts to the current input + the "pushback from past signals" and sends further signal to the transformer, affected by pushback from the downstream elements. In some cases perhaps all this would be negligible. In some cases perhaps it would be significant.
~stratum~
