本文运用KA模型研究了铁电薄膜的电畴反转特性与外加电场强度以及温度的关系。
The dependence of domain reversal characteristics of the ferroelectric thin film on external electric field and temperature is investigated by using the KA model.
计算了换流变压器阀侧绕组在极性反转试验电压下端部电场的分布情况，并对计算结果进行了分析。
The end electrical field distribution under polarity reverse test voltage of valve winding in converter transformer is calculated. The results are analyzed.
主持河北省教育厅项目“本征缺陷的空间分布对铌酸锂畴反转电场的影响研究”。
Project Director, Research Project "Effect of spatial distribution of intrinsic defects on poling field of lithium niobate crystals", The Education Department of Hebei Province.
KTP晶体具有很高的电导率，给利用外加电场法进行周期极化反转带来困难。
The periodical polarization reversion of KTP crystal utilizing electric field suffers from it's high conductivity.
而通过外加电场极化的方法，获得非线性晶体铁电畴反转光栅，是目前普遍采用，且被证明非常有效的方法。
Electrical polarizing method is the most easy and effective way, which can get ferroelectric domain on non-linear crystal, in all methods of QPM technology.
通过一个有解析解的双层有损同轴绝缘结构模型，验证了方法的有效性。最后，分析了一个换流变压器阀侧绕组典型绝缘结构的极性反转电场变化过程。
The proposed method was verified by a simple model, which has analytical solutions, and used to analyze the pr process of a typical oil-paper insulation structure of converter transformer.
通过一个有解析解的双层有损同轴绝缘结构模型，验证了方法的有效性。最后，分析了一个换流变压器阀侧绕组典型绝缘结构的极性反转电场变化过程。
The proposed method was verified by a simple model, which has analytical solutions, and used to analyze the pr process of a typical oil-paper insulation structure of converter transformer.
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