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怎样测量可控硅的耐压

更新时间: 2020-10-05 00:00:00     

可控硅国际通用名称为Thyyistoy,中文简称晶闸管。它能在高电压、大电流条件下工作,具有耐压高、容量大、体积小等优点。测量可控硅的耐压值方法为:万用表选电阻R挡,用红、黑两表笔分别测任意两引脚间正反向电阻直至找出读数为数十欧姆的一对引脚,此时黑表笔的引脚为控制极G,红表笔的引脚为阴极K,另一空脚为阳极A。此时将黑表笔接已判断了的阳极A,红表笔仍接阴极K。此时万用表指针应不动。用短线瞬间短接阳极A和控制极G,此时万用表电阻挡指针应向右偏转,阻值读数为10欧姆左右,说明该可控硅完好。如阳极A接黑表笔,阴极K接红表笔时,万用表指针发生偏转,说明该可控硅已击穿损坏

关键词: 怎样 测量 可控硅

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