基本電學/89年普考 - 普考
By Sandy
at 2013-05-25T21:46
at 2013-05-25T21:46
Table of Contents
http://ppt.cc/hzQ~
因為沒答案 這種變壓器題型的又不熟
想確認一下有沒有算錯 或者我算得太麻煩了 有更簡易的方法(我覺得算Vs的步驟有點多)
有勞高手指教了~
(1)V2=?
V2=I2*Zl=100∠0 mA*10∠53=1∠53 V
(2)Vs=?
Z1/Z2=(N1/N2)^2 >>Z1=(8/1)^2*10∠53=640∠53Ω=384+j512
主線圈Zt=1600+(384+j512)=1984+j512 =2049∠14.5Ω
N1/N2=I2/I1 >>(8/1)=(0.1mA/I1) I1=12.5 mA
Vs=Zt*I1=2049∠14.5Ω*12.5 mA=25.612∠14.5 V
(3)V1=?
25.612∠14.5*(640∠53/2049∠14.5)=8∠53 V
--
因為沒答案 這種變壓器題型的又不熟
想確認一下有沒有算錯 或者我算得太麻煩了 有更簡易的方法(我覺得算Vs的步驟有點多)
有勞高手指教了~
(1)V2=?
V2=I2*Zl=100∠0 mA*10∠53=1∠53 V
(2)Vs=?
Z1/Z2=(N1/N2)^2 >>Z1=(8/1)^2*10∠53=640∠53Ω=384+j512
主線圈Zt=1600+(384+j512)=1984+j512 =2049∠14.5Ω
N1/N2=I2/I1 >>(8/1)=(0.1mA/I1) I1=12.5 mA
Vs=Zt*I1=2049∠14.5Ω*12.5 mA=25.612∠14.5 V
(3)V1=?
25.612∠14.5*(640∠53/2049∠14.5)=8∠53 V
--
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普考
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