环型变压器漏感态小，短路保护比较难做！

传点资料：[图片]VAC磁探针式电流传感器（CS) [图片]LEM电流传感器在开关电源电流检测及保护中的应用 

直流能检测出来吗？ 不能！脉冲电流能检测吗？磁磁芯会饱和！这种只能检测交流，而且最好正负对称！而且线性度是个大问事题！而霍尔电流传感器的原理不是这样的，它是通过霍尔传感器来检测磁通，然后通驱动一路电流来产生反向的磁通，最后使磁芯磁通倾向于零。

改成这样会好些：[图片] 

~3.426V

你的这三个图理论上都是一样的!你可以分析一下功率管的电流就知道！

做一个三角函数表：Sin1=0.01745240643728351sin2=0.03489949670250097sin3=0.05233595624294383sin4=0.0697564737441253sin5=0.08715574274765816sin6=0.10452846326765346sin7=0.12186934340514747sin8=0.13917310096006544sin9=0.15643446504023087sin10=0.17364817766693033sin11=0.1908089953765448sin12=0.20791169081775931sin13=0.22495105434386497sin14=0.24192189559966773sin15=0.25881904510252074sin16=0.27563735581699916sin17=0.2923717047227367sin18=0.3090169943749474sin19=0.3255681544571567sin20=0.3420201433256687sin21=0.35836794954530027sin22=0.374606593415912sin23=0.3907311284892737sin24=0.40673664307580015sin25=0.42261826174069944sin26=0.4383711467890774sin27=0.45399049973954675sin28=0.4694715627858908sin29=0.48480962024633706sin30=0.49999999999999994sin31=0.5150380749100542sin32=0.5299192642332049sin33=0.544639035015027sin34=0.5591929034707468sin35=0.573576436351046sin36=0.5877852522924731sin37=0.6018150231520483sin38=0.6156614753256583sin39=0.6293203910498375sin40=0.6427876096865392sin41=0.6560590289905073sin42=0.6691306063588582sin43=0.6819983600624985sin44=0.6946583704589972sin45=0.7071067811865475sin46=0.7193398003386511sin47=0.7313537016191705sin48=0.7431448254773941sin49=0.7547095802227719sin50=0.766044443118978sin51=0.7771459614569708sin52=0.7880107536067219sin53=0.7986355100472928sin54=0.8090169943749474sin55=0.8191520442889918sin56=0.8290375725550417sin57=0.8386705679454239sin58=0.848048096156426sin59=0.8571673007021122sin60=0.8660254037844386sin61=0.8746197071393957sin62=0.8829475928589269sin63=0.8910065241883678sin64=0.898794046299167sin65=0.9063077870366499sin66=0.9135454576426009sin67=0.9205048534524404sin68=0.9271838545667873sin69=0.9335804264972017sin70=0.9396926207859083sin71=0.9455185755993167sin72=0.9510565162951535sin73=0.9563047559630354sin74=0.9612616959383189sin75=0.9659258262890683sin76=0.9702957262759965sin77=0.9743700647852352sin78=0.9781476007338057sin79=0.981627183447664sin80=0.984807753012208sin81=0.9876883405951378sin82=0.9902680687415704sin83=0.992546151641322sin84=0.9945218953682733sin85=0.9961946980917455sin86=0.9975640502598242sin87=0.9986295347545738sin88=0.9993908270190958sin89=0.9998476951563913sin90=1

句号！

kang_zhenyi@163.com谢谢

我相信电磁辐射对人体的危害，但是我觉的这是全人类的事，不是说就终对我们中国人。我觉的那转转基因食品真要引起我们国家的注意，不要再引进国外的一些转基因食品，要有措施去管理，中国正处在发展中，我们的人民的素质跟那些发达国家还有很大的差距，不要说转基因食品，就是地沟油的事件国家还没处理好，我们真是有点失望。