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光耦的PSpice建模

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发表于 2021-3-16 10:09 | 只看该作者 回帖奖励 |倒序浏览 |阅读模式

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What are some tips for modeling optocouplers for Pspice?
5 P# d) @; }' s% {- l& YThough Model Editor does not provide a template for either an optocoupler or for a phototransistor, it can beused create components of these models. For example,you can use Model Editor to model the electricalcharacteristics of the input LED of an optocoupler.
! q+ T0 q2 E3 G- [+ uIn the case of the optocoupler,you need to create a model for a LED input,and also for a single BJTphototransistor output optocoupler.4 W' F& m( K, N4 G4 I) r8 M
1.LED# R# ^4 j5 v& m: H/ j; v1 n
To model LED input, fit the forward current vs. voltage curve of the LED, and the LED capacitance curve toa PSpice diode. These curves are available in datasheets.6 |- k: u* w9 K2 I
2.CTR curve fit
9 ~9 Q* U( a! F4 @Use Mathcad or Excel to fit the CTR curve to a polynomial. A polynomial which may work is of the formA*exp(B+Cx).* t' H7 G% V4 y% T5 A  [
In the sample model shown below, the Gpcg source models the CTR curve. In this case, two regions were fitseparately, the region If<=10mA and the region If>10mA, where If is the LED forward current. The outputcurrent of the Gpcg source is the phototransistor collector current.* w: e/ M+ t* ]% Y
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  • TA的每日心情
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    2020-8-28 15:14
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    [LV.1]初来乍到

    2#
    发表于 2021-3-16 10:59 | 只看该作者
    这是纯英文的?
  • TA的每日心情
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    2025-5-23 15:33
  • 签到天数: 70 天

    [LV.6]常住居民II

    3#
    发表于 2021-3-25 10:26 | 只看该作者
    光耦的PSpice建模

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    5#
    发表于 2021-5-31 14:57 | 只看该作者
    纯英文吗?      
    ; n; N7 ]! ~; K3 R: G0 N

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    6#
    发表于 2021-7-28 10:15 | 只看该作者
    一个具备反馈系统的PWM电源PSPICE仿真模型
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