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Owen wrote:
Reg Edwards wrote: It is futile to accept Mathcad or any other program as being the Bible unless one is sure that the underlying reasoning, by the user, is correct. Validity of the results are dependent solely on the user, plus the possible uncertainty of program bugs. Well, perhaps the validity of the model, which leads me to... Reg, I mentioned in an earlier post that I was concerned about the estimate of the loop inductance. It was suggested to me that the Lw term that I included because it was in a prof's lecture notes was a double up, and that the La term sufficiently estimates the inducance of the loop. Searching the net suggests that there is some degree of black magic or black art in estimating inductance of such things, and that Grover and Terman had a view on it, but the formula I used seems to be commonly used by online calculators and perhaps a more modern view. Can you (or others) throw any light on the most appropriate formula for estimation of the inductance of a square loop of about the size in the model (0.5m sides, ~2mm dia copper wire). I do recall that you said what I have done is too complicated and it can be done with a hand calculator... but I would like to find an expression for the inductance of the loop that will be accepted generally as the best estimate withing the other constraints of the model and construction. All constructive help appreciated. Owen Hi, Owen - I don't know if the following posts will be of any help at all. Subjects: Wheeler's 1982 formulas verified Wheeler's 1982 formulas verified - Wheeler.gif Another solenoid inductance calculation - Solenoid.zip group: alt.binaries.schematics.electronic Good luck. John |
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