** Next:** Inductor Model
** Up:** Passive Element Lines
** Previous:** Capacitor Model
** Contents**
** Index**

##

Inductors

- General Form:

`l`*name* *n*+ *n*- [*value* | *modname*]
[*options*] [`ind=`*expr* | `poly` *c0* [*c1* ...]]

*Options*:
[m=*mult*] [ic=*val*]

- Examples:

`llink 42 69 1uh
`

lshunt 23 51 10u ic=15.7ma

The *n*`+` and *n*`-` are the positive and
negative element nodes, respectively, and *value* is the
inductance, for a constant value inductor. An inductor model *modname* can optionally be specified. Presently the inductor model
holds only a parallel multiplier default, so an inductance must be
specified in addition to the model.

The parameters accepted for the inductor device are:

`m=`*mult*

This is the parallel multiplier which is the number of devices
effectively in parallel. The given inductance is divided by this
value. It overrides any ``m`' multiplier found in the inductor
model.

`ic=`*val*

The initial condition is the initial (time-zero) value of inductor
current (in Amps) that flows from *n*`+`, through the
inductor, to *n*`-`. The initial condition (if any) applies
only when the `uic` option is specified in transient analysis.

`ind=`*expr*

The *expr* is an expression yielding the inductance in henries.
This is the partial derivative of flux with respect to branch current,
possibly as a function of other circuit variables. The keyword can
alse be given as ```inductance`'' or ```l`'', or may be
omitted since this is the default parameter. Note that the expression
can depend on the branch current, in which case the device is
nonlinear.

`poly` *c0* [*c1* ...]

This form allows specification of a polynomial inductance, which will
take the form
Inductance =
*c*0 + *c*1^{ . }*i* + *c*2^{ . }*i*^{2}...

where *i* is the current flowing through the device from the
positive to the negative element nodes. There is no built-in limit to
the number of terms.

** Next:** Inductor Model
** Up:** Passive Element Lines
** Previous:** Capacitor Model
** Contents**
** Index**
Stephen R. Whiteley
2020-03-29