樓上的你已經知道了嗎,能教教我嗎?

沒有人能幫我,因此我到現在也還沒找到方法.

頂一下

失敗阿!搞了半天不的要領!

一年過去了,還是沒有高手能幫忙解疑嗎?

我也想知道啊!!!!

在Multisim中創建一個230/12V的變壓器
To create a 230 to 12 volt transformer, please follow the instructions
below:


1. Start up Multisim.
2. Enter the Basic Bin and click on the Linear Transformer button
(Transformer with the center tap).
3. In the Browser - Basic window, click on the TS_IDEAL Transformer Model.
4. Click on the Edit button at the bottom of the window.
5. Click Ok on the Database Select - To window (should be set at User).
6. In the Component Properties window, click on the Model Tab and under the
Model Data window, you will find the following:


.SUBCKT ts_audio_10_to_1 1 2 3 4 5
* EWB Version 4 - Transformer Model
* n= 10 Le= 1e-006 Lm= 0.001 Rp= 1e-006 Rs= 1e-006
    Rp   1  6 1e-006ohm
    Rs1 10  3 1e-006ohm
    Rs2 11  5 5e-007ohm
    Le   6  7 1e-006H
    Lm   7  2 0.001H
    E1   9  8  7  2 0.026
    E2   8  4  7  2 0.026
    V1   9 10 DC 0V
    V2   8 11 DC 0V
    F1   7  2 V1 0.052
    F2   7  2 V2 0.052
.ENDS


In order to set the Turn Ratio to a different value (eg 230 to 12 turn
ratio), change the F1 and F2 value for 1/n (1/19.167=0.052; 230 to 12 turn ratio
where n=primary/secondary). Also note that you must set E1 and E2 to F/2
(0.052/2=0.026 turn ratio).


7. Set the desired turn ratio.
8. Click on the Save/Exit button at the bottom of the window.
9. In the previous window, click on the Cancel button.
10. Select Refresh Component Toolbars under the View menu.
11. Enable the User Database and under the Basic Bin, you will find your
Transformer Model.


I have also attached a file containning a Transformer with the above
Netlist
implemented. (File posted at:
www.basicelectronics.com/ewb/trans_230_12.msm)


Summary:


F1 and F2=1/n


where
n=primary turns/secondary turns


E1 and E2=F1/2


I hope this helps.


Best regards,


Luis Alves
Technical Support

我只知道R1 1 7   0.5 中的0.5是修改輸入電壓,MODEL COIL lcouple (num_turns=1)是修改輸出電壓