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Sensitivity problem of enameled wire winding

Question: During our production process, we found that one axis of enameled wire is wound around the axial inductance. This axis of enameled wire and other axis of enameled wire are wound on the same magnetic core. The inductance of the enameled wire with this axis is relatively high. We made 1mH inductance, and the enameled wire of the other axis was only 960uH, and the problematic wire of this axis was 1.025mH, and the inductance test frequency was 796kHz. (1) The number of stitches is the same as the number of turns, excluding the slip ring. (2) The 1-meter straight resistance is a bit smaller than that of other shafts. I personally think that the enameled wire contains magnetic substances, but if it contains magnetic substances, the resistivity should be greater, and the DC resistance should be greater. So please help to solve the problem, or have encountered this kind of problem before, please analyze it, thank you in advance!

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Answer1:
The problem is that in terms of resistance, when the same number of turns, the inductance of a wire with a large resistance is larger than the inductance of the same number of turns under the same conditions.

Answer2:
The host can use the enameled wire for composition analysis, such as scanning with an electronic scanning electron microscope, I am also very curious about this matter, whether the host has tried winding multiple inductances, such as magnetic loops, to see if there is this pattern.

Answer3:
The situation you mentioned should be a problem with the enameled wire itself, and there is a problem with the resistance consistency of the raw material of the enameled wire.

Under normal circumstances, if it is a copper rod drawn from the original copper plate, its oxygen content and impurities should be very small (less), and its resistance should be very small, and it will not appear in your current situation. You can consider trying to buy some well-known enameled wire manufacturers’ products for some tests, such as Taiyi, ESSEX, etc.

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