fdsadfdsid 发表于 2021-6-29 08:54:49

07-LTspice 电阻参数控制

LTspice 电阻参数控制

Syntax: Rxxx n1 n2 <value>
The resistor supplies a simple linear resistance between nodes n1 and n2.

A temperature dependence can be defined for each resistor instance with the parameter tc. The resistance, R, at will be
R = R0 * (1. + dt * tc1 + dt**2 * tc2 + dt**3 * tc3 + ...)where R0 is the resistance at the nominal temperature (27℃)and dt is the difference between the resistor's temperature and the nominal temperature.

案例:16.9 tc=0.01 0.001
阻值R0=16.9Ω tnom=27℃时对应的电阻值,也可以单独设置.options tnom=0,既定温度设定为0℃;那么R0=16.9Ω;
tc1=0.01,tc2=0.001 各项温度系数
设置工作温度范围
.dc temp -45 150 5直流温度扫描;
温度范围-45℃到150℃ 间隔5℃扫描一个点;


888888 发表于 2021-7-16 13:38:38

Behavioral Resistors
R = limit(1,100k,V(1,2)*I(V1)) ; R stays between 1 ohm and 100k
R保持在1欧姆和100k之间

888888 发表于 2021-7-16 13:43:08

Behavioral Resistor & Power Sink/Source
为了避免在接近零的电压下产生大电流,当设备上的电压绝对值低于默认值1伏时,任意的功率汇聚/电源就会折叠成电阻行为,可以通过为设备指定一个VprXover参数来修改折叠点
Bxxx n1 n2 P=<expression> ; example: B1 1 0 P=500W VprXover=5V (R=50mΩ below 5V)
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