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A new method to identify the material of transformer winding

Copper and aluminum, different in electric and mechanical properties, are the main marterial of the internal winding of the transformer, there, nevertheless, is a loss of effective method to identify them unless destroying the insulation. To solve the problem, a test platform is established with an effective and nondestructive method based on Seedback effect is provided in this paper to mesure the tempratural difference between head and terminus of the winding and the thermoelectric potential of the cuircuit to identify the internal marterial. The simulational and experimental results demonstrate the effectiveness of the method.