商用低压ZnO基变频器的形态,结构和物理特征
Kuba Wójcik1, Leszek Litzbarski2,3,4, Marek Olesz2
1Faculty of Electrical and Control Engineering, Gdańsk University of Technology, Narutowicza 11/12, 80-233, Gdańsk, Poland. kuba.wojcik@pg.edu.pl.
Scientific reports
|March 6, 2026
概括
基于ZnO的变频器的老化,随着闪电的击中,增加了泄漏电流和改变了材料相. 综合性研究对于评估商业低压变压器的质量和性能至关重要.
科学领域:
- 材料科学 材料科学 材料科学
- 电气工程 电气工程
- 固态物理 固态物理
背景情况:
- 基于ZnO的变频器对于低压应用中的电压增压保护至关重要.
- 衰老的影响会降低变压器的性能和可靠性.
- 了解衰老后的物质变化对于质量评估至关重要.
研究的目的:
- 为了研究闪电冲动衰老对不同制造商的基于ZnO的变频器的影响.
- 描述老化后微观结构,化学和电气性质的变化.
- 为了将材料变化与变压器性能降低相关联.
主要方法:
- 使用8/20μs电流闪电冲击的变频器老化.
- 粉末X射线衍射 (pXRD) 用于相位识别和微流分析.
- 扫描电子显微镜 (SEM) 用于微观结构检查.
- 电子偏磁共振 (EPR) 用于离子度研究.
- 介电光谱仪用于电性质分析.
主要成果:
- 衰老使泄漏电流增加了高达25%,并诱导了 ZnO 和 Bi2O3 阶段的再结晶.
- 由于朱尔加热,SEM揭示了烧结不均性和微观结构变化.
- EPR显示Mn2+和Co2+度增加,表明离子状态转换.
- 介电光谱检测显示了高达40%的电容性变化和改变的放松机制.
结论:
- 闪电冲击老化显著改变了基于ZnO的变频器的材料特性和电性能.
- 再结晶,离子状态变化和微观结构的不均性导致性能降低.
- 为了可靠地评估商业变压器的质量和寿命,全面的材料表征是必不可少的.
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