Partial discharges testing of power modules
Partial discharges testing of power modules
复制标题
电源模块局部放电测试
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
D. Malec
中科院分区：
文献类型：
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作者：
T. Lebey;S. Dinculescu;D. Malec
用于高压应用（例如铁路牵引系统）的 IGBT 混合功率模块采用多种介电材料制成。该电池堆可能是局部放电源。到目前为止，这些模块都使用标准化测试 (EIC 270) 进行局部放电测试，尽管其质量并不能代表正常操作条件下承受的实际施加应力，因为它不会对堆栈中存在的所有材料施加压力。已经开发出一种确定此类电源模块中局部放电活动的新方法。将此测试应用于 IGBT 模块会导致 PD 点火阈值低于使用归一化测试发现的阈值。本文对这一领域迄今为止所取得的不同成果进行了总结和讨论。此外，还对测试进行了修改，以便将其应用于不同的结构，从而确定此类电源模块中发生局部放电的可能原因。
IGBT hybrid power modules used in high voltage applications (ex. railway traction systems) are built using several dielectric materials. This stack may be a source of partial discharges. Up to now these modules are tested as regards partial discharges using a normalized test (EIC 270), which despite its quality is not representative of the real applied stresses endured during normal operating conditions, as it does not stress all the materials present in the stack. A new method for determining partial discharges activity in such power modules has been developed. Application of this test to IGBT modules leads to a PD ignition threshold lower than the one found using the normalized test. In this paper the different results obtained up to now in this field are summarized and discussed. Additionally, the test is modified in order to apply it to different structures in order to identify the possible cause of PD developments in such power modules.