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/57/1533051190079422.bmp');}" onmousewheel="return imgzoom(this);">EI40 flyback变压器设计
下面的个图是我刚弄得个变压器,我总觉得Lp太小了点,但又不知道是哪里算错了,请大家帮我看看Lp算得哪里出问题了,谢谢!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/57/1533051190079422.bmp');}" onmousewheel="return imgzoom(this);">
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/57/1533051190079422.bmp');}" onmousewheel="return imgzoom(this);">全部回复(29)
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@310555397
确是新手,DCM和CCM好像就是IPK不一样,LP不一样,其它的参数都是一样的吧?有时间帮我看下CCM状态时LP为多少呢?我早上刚用示波器测了那个S极那个电阻上的电流波型,不是像大家说的那样是三角形,转梯形波,根本看得全是有很高尖峰的杂波,我示波器是100M的LCD显示的那种,不知道是不是示波器的问题,再说用示波器测D极到地的电压波弄也能看到DCM到CCM状态转换是吗?
According to my experienced calculation,它的感量在300uH,Np=30Turns.我是考虑到90Vac最低波动电压来计算的(i.e.100Vdc input).If you only needs 100Vinput,then the inductance can be greater than 300uH,(350uH-500uH max.)It depends on your specific requirement from customer.But you must consider how to keep the balance between efficiency&Temperature and EMI during design.
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@zyhhcr
Accordingtomyexperiencedcalculation,它的感量在300uH,Np=30Turns.我是考虑到90Vac最低波动电压来计算的(i.e.100Vdcinput).Ifyouonlyneeds100Vinput,thentheinductancecanbegreaterthan300uH,(350uH-500uHmax.)Itdependsonyourspecificrequirementfromcustomer.Butyoumustconsiderhowtokeepthebalancebetweenefficiency&TemperatureandEMIduringdesign.
这位大师英语真是好,可我只能看懂点小半,能不能说下中文呢?
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