那同步跟异步间有何差异？
不是同步跟异步间有何差异, 而是你的设计对于同步(随机角度)或异步(指定角度)之被干扰程度是否一样! H-RH 发表于 2013-6-5 17:28 static/image/common/back.gif
IEC 61000-4-5 中的要求是同步的, 0°, 90°, 180°, 270°
能说一下具体是哪条有提到吗，一直没发现有类似的内容，谢谢！ diler 发表于 2014-6-16 10:14 static/image/common/back.gif
能说一下具体是哪条有提到吗，一直没发现有类似的内容，谢谢！
EN 61000-4-5:2006
8.2 Application of the surge in the laboratory
– test level (voltage) (refer to Annex A);
– number of surges:
number of surge pulses unless otherwise specified by the relevant product standard:
- for d.c. power ports and interconnection lines five positive and five negative surge
pulses;
- for a.c. power ports five positive and five negative pulses each at 0º, 90º, 180º and at
270º;
– time between successive pulses: 1 min or less;
– representative operating conditions of the EUT;
– locations to which the surges are applied. 本帖最后由 H-RH 于 2014-6-16 13:41 编辑
diler 发表于 2014-6-16 10:14 static/image/common/back.gif
能说一下具体是哪条有提到吗，一直没发现有类似的内容，谢谢！
如果是 IEC 61547 则有些分別：
IEC 61547:2009
5.7 Surges
These tests are carried out according to IEC 61000-4-5, with test levels as given in Table 10 of this standard. Lower levels need not to be tested. Pulses shall be applied to the a.c. voltage wave as follows; five positive polarity pulses at the 90o phase angle, five negative polarity pulses at the 270o phase angle. Two test levels are given for different types of lighting
本帖最后由 H-RH 于 2014-6-16 13:40 编辑
钟夏 发表于 2013-7-5 09:52 static/image/common/back.gif
**** 作者被禁止或删除 内容自动屏蔽 ****IEC 61547 只针对 90° 及 270° H-RH 发表于 2014-6-16 13:32 static/image/common/back.gif
IEC 61547 只针对 90° 及 270°
了解，谢谢
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