
EI40 flyback變壓器設計
下面的個圖是我剛弄得個變壓器,我總覺得Lp太小了點,但又不知道是哪里算錯了,請大家幫我看看Lp算得哪里出問題了,謝謝!

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@310555397
確是新手,DCM和CCM好像就是IPK不一樣,LP不一樣,其它的參數都是一樣的吧?有時間幫我看下CCM狀態時LP為多少呢?我早上剛用示波器測了那個S極那個電阻上的電流波型,不是像大家說的那樣是三角形,轉梯形波,根本看得全是有很高尖峰的雜波,我示波器是100M的LCD顯示的那種,不知道是不是示波器的問題,再說用示波器測D極到地的電壓波弄也能看到DCM到CCM狀態轉換是嗎?
According to my experienced calculation,它的感量在300uH,Np=30Turns.我是考慮到90Vac最低波動電壓來計算的(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.我是考慮到90Vac最低波動電壓來計算的(i.e.100Vdcinput).Ifyouonlyneeds100Vinput,thentheinductancecanbegreaterthan300uH,(350uH-500uHmax.)Itdependsonyourspecificrequirementfromcustomer.Butyoumustconsiderhowtokeepthebalancebetweenefficiency&TemperatureandEMIduringdesign.
這位大師英語真是好,可我只能看懂點小半,能不能說下中文呢?
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