在进行变压器绕组直流电阻的测量时，变压器绕组可以等效为一个由电阻、电感组成的串联电路。
During the measuring of the DC resistance of a transformer's winding, the winding is equivalent to a resistance-inductance series circuit.
研究表明，等效串联电阻随着有效介质层厚度的降低而降低，直流电阻随着有效介质层数的增加而降低。
It is found that ESR decreases with decrease of the active dielectric layer thickness, and DC resistance decreases with the increases of active dielectric layer number.
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