Re: Modeling (Motor & Fan) in Spice?

On 3 Dec 2003 10:05:51 -0800, [EMAIL PROTECTED] (Dale Chisholm)
wrote:

>Has anybody come across Spice models for a motor-driven blower or fan?
> I have models for small motors, wher (to a first approximation) motor
>speed is proportional to terminal voltage and shaft torque is
>proportional to armature current.  But I have a data sheet for a
>blower, with a performance curve relating air flow rate (cu ft/min) to
>back pressure (inches of H2O).  I can easily measure terminal
>charcteristics (voltage and current) with the air path either
>completely open or fully blocked.  Now - how do I couple this
>information together to relate the electrical characteristics to a
>given flow/pressure situation?
>
>Thanks - 
>Dale

Perhaps you can enter data into a table. PSpice and LTspice have such
support for voltage-controlled voltage source (E) and
voltage-controlled current source (G). The table data is interpolated
during the sim. Only good for AC analysis.

Mark