Aluminum winding wire instead of copper wire motor is a major trend. From the aspects of energy, cost and technology, the transformation of copper wire motor to aluminium wire motor is a feasible scheme, except for some motors with special requirements. Specific performance is as follows: 1) Aluminum winding wire price is about one third of copper wire, and the use of aluminum wire in the use process is only one third of the weight of copper wire. The cost of enameled wire is estimated to be 1/5 of the copper wire at most. With the consumption and waste of these non renewable resources in the world, the price gap will also widen. 2. The original copper wire motor itself is designed with allowance. For example, 1500W motors only use about 1300W in practical situations, so it is entirely possible to replace them with aluminum winding wire . (3) The efficiency of aluminium wire motors can be very good without other restrictions. Engineers who develop aluminium wire motors have found that the efficiency of aluminium wire and copper wire motors can be almost or very close by changing the diameter of aluminum winding wire and the number of turns of coils. Of course, some properties of aluminium wire itself are not as good as those of copper wire, so it is necessary to change a lot of technology in the design of aluminium wire motor to make up for or avoid some defects of aluminum winding wire.
 


Points for attention of copper to aluminum
 
1) The old-fashioned connection of aluminium wire motor: Because some chemical and physical properties of aluminium wire itself determine that the treatment of aluminium wire in connection is very critical. (1) to expose the aluminum wire or the joint tightly, and avoid oxidation in the air. (2) There must be a kind of excessive metal between copper and aluminium (such as welding) when connecting aluminium wire and copper lead, avoiding direct contact between copper and aluminium (such as tapping), so that potential corrosion caused by potential difference between copper and aluminium can be avoided.

(2) Temperature rise of motor can be controlled by changing the diameter and turns of aluminium wire. Generally, multiplying the diameter of copper wire by 1.28 can achieve the effect that temperature rise does not change basically, but because of different heat dissipation coefficient, different coefficients can be multiplied for different types of motor. Because the relationship between the change of the wire diameter and the full rate of the slot also needs to be readjusted, the method of deep groove is usually adopted, so that the copper wire used in the die for the aluminum wire can also be used to share the resources.

(3) Through the process, the damage of aluminium wire motor is minimized and the efficiency is faster: _Because the most vulnerable place of enameled wire is the place where the paint has been stripped, it is necessary to wrap the aluminium wire outside the copper wire and the unpainted part should also be wrapped in a circle, so as to ensure that the place where the paint has been stripped can be tin-coated, and the welding effect is consistent with that of the copper wire. In addition, the chemical properties of aluminium wire are active, and the welding materials used must not have any corrosiveness to the aluminium wire. On this premise, the welding joints should be protected. (2) If the product structure permits, try to use tin furnace to weld the aluminium wire, because a, welding efficiency will be much higher. B, which costs a lot of money. C, welding effect tin bar will be much better (large contact area, high temperature, can instantly evaporate the flux.
Signi Aluminum is the professional aluminum winding wire manufacture supplier in China, product including enameled aluminum wire, fiberglass aluminum wire, paper wrapped aluminum wire, NOMEX paper covered wire, 3M paper covered wire, which is widely used in Motor winding and transformer winding.