Hi

I am trying to use this motor model:
http://www.ecircuitcenter.com/Circuits/dc_motor_model/DCmotor_model.htm

It gives me a *.cir file.

I wondered do I just copy this file to LTSpice, or do I need to create a component for the gui?

It is pretty vague to a novice.

Thanks

 

hi dux,
If you sign up for the free Yahoo LTS user group, there are lots of models, including a number of motors.
You may find trying to use Spice models that some of the parameters are different or undefined in LTSpice.
E
https://groups.yahoo.com/neo/groups/LTspice/files/%20Lib?prop=eupdatehttp://groups.yahoo.com/neo/groups/LTspice/files/%2520Lib%3fprop=eupdate

 

The LTS Help says this about a *.cir file:-

How do I run a netlist?
Just open the text file first and then run it. LTspice IV will recognize the file as a netlist if it has file extension of ".cir"

 

Thanks Alex

I tried to post on the yahoo group but my browser was having none of it.

I will have another search for stuff, the last search I did gave me too many hits

I think the cir file is maybe the wrong thing for what I want

I am going to try this first:
http://www.bot-thoughts.com/2009/10/custom-components-in-ltspice.html

 

Hi

I am trying to use this motor model:
http://www.ecircuitcenter.com/Circuits/dc_motor_model/DCmotor_model.htm

It gives me a *.cir file.

I wondered do I just copy this file to LTSpice, or do I need to create a component for the gui?

It is pretty vague to a novice.

Thanks

Hi

Start LTSpice, open the .cir file from the "file" menu, click anywhere in the file to be sure its active, then click the Run button (Running Man symbol). A plot screen should then display.

Then,

RHT-cLk in the file window, and select "Visible Traces" from the menu, then select the values specified by this statement:

.PRINT TRAN V(1) I(VSENSE1)

The selected values should be V(1) and I(VSENSE1) and should be displayed in the plot screen.

see attached

eT

 

http://www.bot-thoughts.com/2009/07/spice-part-5.html

I am looking at this site and on it is a screenshot of a circuit.

On the far left is a symbol with an arrow.

Does anyone know what this is?

Not as important but... on the right hand side the E_EMF part seems to have a second set of + - signs where the wires intersect... I cannot get my LTSpice schematic to do this, I just get typical joins.(blue little squares)

Is this a trick I am missing?

 

Oh might be voltage dependent source

 

Oh might be voltage dependent source

Its a Current Source symbol in LTSpice

 

Almost done.

Just seeming to have issue having the sub circuit be recognised by the other files.

I have :

.asc
.asy
.cir

files.

The tutorial mentions an include directive, but its not really shown.

Subcircuits are referenced (called) by the pseudo-element identifier X followed by whatever name assigned to the instance of the subcircuit:

XYYYYYYYN1 [ N2N3 ... ] SUBNAM

Including Files

SPICE also lets you include entire files via the .INCLUDE card. I used this when simulating the motor in MacSpice.

.INCLUDE filename

So let's put the motor subcircuit in a separate file, motor.cir, and we can include it into our earlier circuit description.

I get an error missing schematics of the hierarchy.

Can anyone help me work it out?

Ta

 

Almost done.

Just seeming to have issue having the sub circuit be recognised by the other files.

I have :

.asc
.asy
.cir

files.

The tutorial mentions an include directive, but its not really shown.





I get an error missing schematics of the hierarchy.

Can anyone help me work it out?

Ta

Just read post #5...

eT

 

I thought post number 5 just showed how to run the .cir file?

I have managed that and it isn't really what I require.

I am now after doing something a little different

cheers

 

I thought post number 5 just showed how to run the .cir file?

I have managed that and it isn't really what I require.

I am now after doing something a little different

cheers

Ok...just answering your original post.

eT

 

http://www.bot-thoughts.com/2009/07/spice-part-5.html

I am looking at this site and on it is a screenshot of a circuit.

On the far left is a symbol with an arrow.

Does anyone know what this is?

Not as important but... on the right hand side the E_EMF part seems to have a second set of + - signs where the wires intersect... I cannot get my LTSpice schematic to do this, I just get typical joins.(blue little squares)

Is this a trick I am missing?

The symbol on the far left is a F element or CCCS (current controlled current source). The one one the right is an E element or VCVS (voltage controlled voltage source)

You should be using the E element in the sym folder..it is a 4 terminal element.

eT