Specification
Aluminum windings in transformers
Source：Original
Editing：frank
Time：2020-11-30 15:50
The application of aluminum windings in transformers is very common in European and American countries, because the price of aluminum is much cheaper than copper, and the density of aluminum is much smaller than that of copper. In the case of the same cross section, aluminum is much lighter than copper. The resistivity at 20°C is copper: 0.017241Ω·mm2/m; aluminum: 0.02801Ω·mm2/m. As long as you choose aluminum with a larger cross-section, you can guarantee the same or even lower loss value as copper.
For epoxy resin cast dry-type transformers, since the coefficient of thermal expansion and contraction of aluminum is closer to that of epoxy resin than that of copper, the crack resistance of aluminum windings is better than that of copper windings. Moreover, since the mechanical strength of the dry epoxy resin casting winding itself is very good, there is no difference in mechanical strength between copper and aluminum.
Aluminum windings in transformers can operate safely and reliably.
The IEC standards and national standards do not exclude aluminum as a conductor. In GB1094.5-2008 Item 4.1 and IEC60076-5:2006, the provisions and calculation methods for the heat resistance of copper windings and aluminum windings withstand short circuits are given. And related parameters, it can be analyzed that aluminum conductors can be used as transformer conductors.
As long as the aluminum wire transformer can withstand the requirements of heat resistance during short-circuit current and can withstand the dynamic stability requirements of mechanical force during short-circuit, it is qualified.
As long as the design is reasonable and the process must be adjusted accordingly, especially when the welding technology is advanced, it can achieve high temperature resistance (increased heat resistance level) and low loss, and aluminum wire transformers will definitely be widely used. Users must also have the corresponding understanding. Users think that aluminum wire transformers have a high temperature and short life, and they are afraid to use them. However, users praise imported aluminum wire transformers, but worry about domestic aluminum wire transformers. There must be a unified understanding between the transformer factory and the user, and the promotion and application of aluminum wire transformers can proceed smoothly.
Many transformer companies are already using aluminum wire or aluminum foil to produce transformers, especially epoxy cast dry-type transformers. Aluminum windings in transformers are very common.
Henan Signi Aluminum Co., Ltd. specializes in the production of aluminum windings in transformers, including aluminum enameled wire, aluminum glass wire covered wire, paper covered wire, 1350 1060 1070 round-edge transformer aluminum strip, round-corner aluminum row and other products, which are widely used in transformer winding. Globally, including LEGRAND, TOSHIBA, SIMMENSE and other famous companies, customers from all over the world are welcome to consult and cooperate.
For epoxy resin cast dry-type transformers, since the coefficient of thermal expansion and contraction of aluminum is closer to that of epoxy resin than that of copper, the crack resistance of aluminum windings is better than that of copper windings. Moreover, since the mechanical strength of the dry epoxy resin casting winding itself is very good, there is no difference in mechanical strength between copper and aluminum.
Aluminum windings in transformers can operate safely and reliably.
The IEC standards and national standards do not exclude aluminum as a conductor. In GB1094.5-2008 Item 4.1 and IEC60076-5:2006, the provisions and calculation methods for the heat resistance of copper windings and aluminum windings withstand short circuits are given. And related parameters, it can be analyzed that aluminum conductors can be used as transformer conductors.
As long as the aluminum wire transformer can withstand the requirements of heat resistance during short-circuit current and can withstand the dynamic stability requirements of mechanical force during short-circuit, it is qualified.
As long as the design is reasonable and the process must be adjusted accordingly, especially when the welding technology is advanced, it can achieve high temperature resistance (increased heat resistance level) and low loss, and aluminum wire transformers will definitely be widely used. Users must also have the corresponding understanding. Users think that aluminum wire transformers have a high temperature and short life, and they are afraid to use them. However, users praise imported aluminum wire transformers, but worry about domestic aluminum wire transformers. There must be a unified understanding between the transformer factory and the user, and the promotion and application of aluminum wire transformers can proceed smoothly.
Many transformer companies are already using aluminum wire or aluminum foil to produce transformers, especially epoxy cast dry-type transformers. Aluminum windings in transformers are very common.
Henan Signi Aluminum Co., Ltd. specializes in the production of aluminum windings in transformers, including aluminum enameled wire, aluminum glass wire covered wire, paper covered wire, 1350 1060 1070 round-edge transformer aluminum strip, round-corner aluminum row and other products, which are widely used in transformer winding. Globally, including LEGRAND, TOSHIBA, SIMMENSE and other famous companies, customers from all over the world are welcome to consult and cooperate.
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