哪位老兄能指点一下吗
我测试电子变压器的输出端传导不过,测试的探头是这样接的:有一根接大地,有一根接输出的任意一根.这个电路板电源输入端已经加了一个共模电感是50毫亨,它的前后各加了一个0.10uf和0.22UF的电容.我测试这个传导没过后我在输出端加了一级共模不见效果,只加一个电感也没有效果,共模的大小都试过,都不见效果
我在输出加一个共模,在共模的后边并上一个0.47UF的电容,然后用一个Y电容一脚焊在电感的后边,一脚焊在电源输入的任意一根线上,再测传导,这时效果出来了,在线的下边了,最高只是接近线.但是再测另一根时还是在线上,用同样的方法在这根线和电源输入线接一个Y电容,再来测,这时两根又超出线了.参数大小都试过,还是不行.总的来说调整好一根,另一根又过了,如果两根同时用同样 的方法,那两根都没有过.
我都调将近两个月了,人都快要散架在实验室里了.那位老兄能帮我一下吗.在这小弟向各位好心人说声谢谢了!!这个太急了500) {this.resized=true; this.width=500; this.alt='这是一张缩略图,点击可放大。\n按住CTRL,滚动鼠标滚轮可自由缩放';this.style.cursor='hand'}" onclick="if(!this.resized) {return true;} else {window.open('http://u.dianyuan.com/bbs/u/52/1177055368.gif');}" onmousewheel="return imgzoom(this);">
电子变压器输出传导测试(以大地做参考电位)
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@yxdz
[图片]500){this.resized=true;this.width=500;this.alt='这是一张缩略图,点击可放大。\n按住CTRL,滚动鼠标滚轮可自由缩放';this.style.cursor='hand'}"onclick="if(!this.resized){returntrue;}else{window.open('http://u.dianyuan.com/bbs/u/52/1177055862.gif');}"onmousewheel="returnimgzoom(this);">
按照标准EN55015:2000,单独的电子变压器一般情况下是要做负载端的传导干扰的,
只有在以下两种情况下可不做:
1)负载端带有固定的不可分离的负载线;
2)制造商在安装说明书上明确规定安装位置,类型,最大负载线长度等信息.
>如果产品想避开负载端干扰测试,
>最好在说明书中规定线径等其他安装信息.相关内容可参考如下:
>5.3.3 Independent transformers and convertors for incandescent lamps
>5.3.3.1 General
>Transformers for incandescent lamps change only the voltage and do not
>convert the mains frequency,
>whereas convertors also convert the frequency. Both kinds of devices can
>incorporate means for
>regulating the light output of the lamps.
>5.3.3.2 Independent transformers
>For voltage transformers for incandescent lamps which do not regulate the
>voltage by means of active
>electronic components, the condition of 5.2.2 applies. Other independent
>transformers for
>incandescent lamps shall comply with the terminal voltage limits given in
>tables 2a and 2b.
>5.3.3.3 Independent convertors
>Independent electronic convertors for incandescent lamps shall either:
>a) comply with the terminal voltage limits given in tables 2a and 2b; or,
>b) where the convertor has a non-detachable load supply cable, or where the
>manufacturer
>gives strict installation instructions which define the position, type and
>maximum length of
>cable(s) to be connected to the lamp(s), then the convertor shall comply
>with the terminal
>voltage limits given in table 2a and with the radiated disturbance limits
>given in table 3,
>under these conditions.
只有在以下两种情况下可不做:
1)负载端带有固定的不可分离的负载线;
2)制造商在安装说明书上明确规定安装位置,类型,最大负载线长度等信息.
>如果产品想避开负载端干扰测试,
>最好在说明书中规定线径等其他安装信息.相关内容可参考如下:
>5.3.3 Independent transformers and convertors for incandescent lamps
>5.3.3.1 General
>Transformers for incandescent lamps change only the voltage and do not
>convert the mains frequency,
>whereas convertors also convert the frequency. Both kinds of devices can
>incorporate means for
>regulating the light output of the lamps.
>5.3.3.2 Independent transformers
>For voltage transformers for incandescent lamps which do not regulate the
>voltage by means of active
>electronic components, the condition of 5.2.2 applies. Other independent
>transformers for
>incandescent lamps shall comply with the terminal voltage limits given in
>tables 2a and 2b.
>5.3.3.3 Independent convertors
>Independent electronic convertors for incandescent lamps shall either:
>a) comply with the terminal voltage limits given in tables 2a and 2b; or,
>b) where the convertor has a non-detachable load supply cable, or where the
>manufacturer
>gives strict installation instructions which define the position, type and
>maximum length of
>cable(s) to be connected to the lamp(s), then the convertor shall comply
>with the terminal
>voltage limits given in table 2a and with the radiated disturbance limits
>given in table 3,
>under these conditions.
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@austen
按照标准EN55015:2000,单独的电子变压器一般情况下是要做负载端的传导干扰的,只有在以下两种情况下可不做:1)负载端带有固定的不可分离的负载线;2)制造商在安装说明书上明确规定安装位置,类型,最大负载线长度等信息.>如果产品想避开负载端干扰测试,>最好在说明书中规定线径等其他安装信息.相关内容可参考如下:>5.3.3Independenttransformersandconvertorsforincandescentlamps>5.3.3.1General>Transformersforincandescentlampschangeonlythevoltageanddonot>convertthemainsfrequency,>whereasconvertorsalsoconvertthefrequency.Bothkindsofdevicescan>incorporatemeansfor>regulatingthelightoutputofthelamps.>5.3.3.2Independenttransformers>Forvoltagetransformersforincandescentlampswhichdonotregulatethe>voltagebymeansofactive>electroniccomponents,theconditionof5.2.2applies.Otherindependent>transformersfor>incandescentlampsshallcomplywiththeterminalvoltagelimitsgivenin>tables2aand2b.>5.3.3.3Independentconvertors>Independentelectronicconvertorsforincandescentlampsshalleither:>a)complywiththeterminalvoltagelimitsgivenintables2aand2b;or,>b)wheretheconvertorhasanon-detachableloadsupplycable,orwherethe>manufacturer>givesstrictinstallationinstructionswhichdefinetheposition,typeand>maximumlengthof>cable(s)tobeconnectedtothelamp(s),thentheconvertorshallcomply>withtheterminal>voltagelimitsgivenintable2aandwiththeradiateddisturbancelimits>givenintable3,>undertheseconditions.
楼主不出现了?代向好心人问好!
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