Introduction to the electrical conductivity and connection of aluminium Magnet wire:

First, aluminum has a lower conductivity than copper. As compensation, the cross-section of the aluminum magnet wire must be larger than the cross-section of the equivalent copper wire to provide the same conductivity.

This means that compared with the equivalent copper wire motor, the windings wound with aluminum wire may have a larger volume.

The second consideration is to properly connect the ends of the aluminum magnet wire. The reason for this can be traced back to your high school chemistry course. As you may remember, aluminum oxidizes much faster than other metals. In fact, if exposed to the air, aluminum powder will completely oxidize within a few days to form a white fine powder. However, when exposed to air, the finished aluminum (sheets, wires, etc.) tends to form a hard insulating oxide layer, thereby stopping the oxidation process.