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如何对MOS 做IEC 60335-1 A2 cl 19.11.2 g)的测试?
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节示标准如下:. W' }$ T5 _% a) B6 ? Z4 w
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19.11.2 g) failure of an electronic power switching device in a partial turn-on mode with loss of gate (base) control. During this test, winding temperatures shall no exceed the values give in 19.7.
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0 q; }. r# _. \; o+ f5 DNOTE 3 This mode may be simulated by disconnecting the electronic power switching device gate (base) terminal and connecting an external adjustable power supply between the gate (base ) terminal and the source (emitter) terminal of the electronic power switching device. The power supply is then varied so as to achieve a current that will not damage the electronic power switching device but give the most onerous conditions of test.$ J' W1 X8 h/ }3 ?* l! r
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' Z, |1 R& |, T1 U5 Q5 t标准的意思:8 f9 M" `; a( x# g
8 _& `9 l& y" b/ o3 R! u将MOS管的栅级断开再外加电源为MOS管供电,目的是要模拟出既要MOS不烧坏又要出现发热的最严酷的情况。标准上只是说了个原则上是:既要MOS不烧坏又要出现发热的最严酷的情况.
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# N: ]- G, E- E5 k1 b: V* T7 }但是实际操作比较困难!
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% H1 ^# o, e- F# ]" P那位大佬有没有比较好的办法分享一下? 谢谢! |
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