應(yīng)該是把所有輸出的繞組都短接起來(lái),因?yàn)槿魏我粋€(gè)輸出繞組都可以傳遞通過(guò)原邊耦合的勵(lì)磁能量,而反激電源原邊漏感的物理意義是無(wú)法通過(guò)勵(lì)磁耦合到輸出部分的電感,所以測(cè)原邊漏感要把所有輸出繞組都短路.

非常感謝您的解答,可不可以幫我做一個(gè)題目:

   To measure leakage inductance, short circuit tests are performed on the 3-winding transformer below. The results are as follows:
   measure A with B shorted: 1uH
   measure A with C shorted: 1uH
   measure B with C shorted: 1uH
   What will you measure at A if both B and C are shorted?
   Give your reasons?

圖為:

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謝謝您的解答,我這里有答案,就是看不懂:

  L1+L2=1uH   (1)
  L1+L3=1uH   (2)
  L2+L3=1uH   (3)
由式(1)(2)(3)得
L2=L3  (4)
  L1=L2  (5)
由式(3)(4)得
  L2=L3=0.5uH (6)
由式(5)(6)得
  L1=L2=L3=0.5uH (7)
如果B和C短接,則
L2//L3＝0.25uH
進(jìn)而A端的感值
L1+L2//L3=0.75uH

我主要想知道他為什么這算?

設(shè)1,2,3繞組漏感(單獨(dú))的分別是L1,L2,L3,繞組匝數(shù)分別是N1,N2,N3
則有:
L1+L2(N1*N1/N2/N2)=1UH
L1+L3(N1*N1/N3/N3)=1UH
L2+L3(N2*N2/N3/N3)=1UH
應(yīng)該不能簡(jiǎn)單地那么列方程計(jì)算

討論變壓器設(shè)計(jì)群24852068