Timeline for Transformer Zero Flux Approximation
Current License: CC BY-SA 4.0
5 events
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| Oct 2, 2021 at 15:17 | comment | added | Neil_UK | @Brad Of course, permeability goes to infinity which means R goes to zero. Op amps get 'closer' to infinity with their gains of 10s of millions, whereas permeability only goes to thousands, but the important thing is that the difference between the NI terms is very small, a few percent, compared too their size. | |
| Oct 2, 2021 at 14:25 | comment | added | Brad | Thanks for your response; it makes perfect sense. My follow up question is what math/physics enables you to set the \$ \Phi R \$ term to 0? that For a voltage buffer amplifier, the error in input voltage is \$\frac{1}{A+1}\$, and as the open loop gain approaches infinity, the inputs become the same voltage. Is there some similar math argument that explains the approximation for a transformer? | |
| Oct 1, 2021 at 11:08 | history | edited | Neil_UK | CC BY-SA 4.0 |
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| Oct 1, 2021 at 8:46 | history | edited | Neil_UK | CC BY-SA 4.0 |
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| Oct 1, 2021 at 8:03 | history | answered | Neil_UK | CC BY-SA 4.0 |