2)Less FlexibleĬopper is more difficult to wind into a core than the more flexible aluminium. Various Disadvantages of Copper winding are listed below: 1)ExpensiveĬopper is significantly more expensive than aluminium. Special procedures need to be followed for Al connections. 6) Easy to repair broken wire connectionĪl winding repairs when broken is much more difficult as it cannot be soldered. 5) Smaller winding sizeĪl has more resistivity than Cu, so Al winding size increases.
There is no Galvanic corrosion as observed in Al connections. 4) No Galvanic corrosionĬu wires can be connected to each other and other metal conductors easily. But this is open to the fluctuating copper prices. In rare cases, transformers with copper winding can be less expensive to manufacture because they are smaller.
3)Transformer with copper winding less expensive 2) Higher Current carrying capacityĬopper can carry almost twice the current capacity of aluminium, which makes them slightly smaller in size than aluminium wound transformers. It expands less but both materials have a similar maintenance schedule. Various Advantages of Copper winding are listed below: 1) Stronger than aluminiumĬopper is stronger than aluminium. 3)ConductivityĪluminum’s conductivity is lower than copper. But since aluminum requires more turns and/or a larger diameter wire, the size of the motor will go bigger. It is possible to match the power performance of a motor wound with aluminum to a motor wound with copper. That means Aluminium wound coils are larger than an equivalent copper coil, meaning it requires approximately 1.8 times as much cross-section as copper to carry an equivalent amount of current. To compensate, aluminum windings cross-section must have 1.6 times larger and diameter must be 1.26 times of copper windings to offer the same conductance.
Various Advantages of Aluminium winding are listed below:Īluminium costs a lot less than copper and thus brings commercial advantages.