As far as enameled aluminum wire itself is concerned, i […]
As far as enameled aluminum wire itself is concerned, its resistivity is different from that of copper wire. Therefore, if the copper is changed to the enameled wire, as long as the wire diameter of the aluminum wire is increased according to the resistivity ratio, the temperature, current, and energy efficiency of the aluminum wire will not increase. Worse than copper wire. Therefore, in design, there is no problem in converting copper to aluminum. However, because aluminum is extremely active, it is easy to oxidize, and it is difficult to apply in. Many companies are plagued by this problem. Therefore, the key to the application of enameled aluminum wire is how to solve the welding problem of the connection point.
As for aluminum wire welding, there is terminal riveting and solder wire welding, and some use copper wire to wrap the aluminum wire for re-welding. At present, there are not many domestic companies engaged in aluminum arc welding. The welding of aluminum wire is divided into two processes: one is peeling and the other is welding.
In terms of paint removal, many factories use high-temperature soldering. After the iron is hot, the aluminum wire turns yellow and black. Basically, it is impossible to weld. In some paint strippers, the temperature is very high due to friction. Therefore, the aluminum wire after paint removal is damaged on the one hand, and on the other hand, the surface of the aluminum wire becomes black and oxidized seriously. Tinning is also extremely difficult.
The first is the riveting terminal, the aluminum wire oxidizes quickly. In addition, the potential difference between copper and aluminum is large. Electrochemical corrosion will gradually occur during the electrification process. The resistance of the connection point will gradually increase, and the temperature rise will become higher and higher. Finally, no power shall be exerted.
Solder wire welding is also a problem. The temperature of the soldering iron cannot be very high, so it is easy to produce sound welding surfacing. The surface looks very full, but it is actually wrapped in it. Other fluxes cannot achieve a short vaporization time, so welding There will be a lot of flux residue inside the spot, this method is proved to be unreliable.
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