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Re: Transformer models WAS: New Simulator Written by Mike Engelhardt #Transformer

 

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That's the trouble. Vastly over-simplified articles like that, while not wrong, tell you just enough to get totally confused. For example, you set the turns ratio right, to get 6 V out from a 120 V input, but you set the inductance of the 120 V winding 3 to 6 orders of magnitude too low (or too high; then then transformer works but costs $1000 too much).

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Best wishes John Woodgate OOO-Own Opinions Only

Rayleigh, Essex UK

I hear, and I forget. I see, and I remember. I do, and I understand. Xunzi (340 - 245 BC)


On 2023-04-29 20:10, David Schultz wrote:

On 4/29/23 1:50 PM, Jim Wagner wrote:
BUT, what are those ¡°easily measured or calculated parameters¡±? I am a circuit designer and have no idea what they are (or how to do the measurements)!. I strongly suspect that I am not alone. How about a tutorial for the wiki?


The most important, usually, is turns ratio. While it isn't exactly straight forward to enter that in LTSpice, it isn't difficult:



Providing detailed parameters like inductance and parasitic capacitance is harder. Important if you need it but usually not so much.

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