Hi,
There was an example from my book and I wanted to build the same circuit on LTspice to test the results.
However, when I create to simulate the circuit in the LTSpice environment you see below with the different outcome values.

and here my ltspice results:

I could not find the same voltage and current values with the currently shown hand-draw results.
What is the mistake I do please?

 

hi tm,
Welcome to AAC,
Please post your LTS asc file and we can compare results.
E

 

hi tm,
Welcome to AAC,
Please post your LTS asc file and we can compare results.
E

Ah yeah sure, thank you:

I made 2 different run forms. One of it was run by 1 {freq} {freq} and other asc. file has been run by 2 {freq} {freq+1n} with 2 point "sweep"
edit: The reason why I used 2 sweep points, just because of testing the component voltages and currents one by one.
and other asc. file which I posted was created with a single-point run AC view.

 

Hi,
I am unable to run the sim due to you having used models for your inductors.
Do you know the LTSpice equivalent inductance values, I can then use the LTS version.
R

 

Hi,
I am unable to run the sim due to you having used models for your inductors.
Do you know the LTSpice equivalent inductance values, I can then use the LTS version.
R

Yeah, sorry I added some external library files.
Let me re-generate it with the general components.

edit: I re-drawed them, please you can check them again.

 

I could not find the same voltage and current values with the currently shown hand-draw results.
What is the mistake I do please?

Are you sure that your program can read the shown values for the inductances L1-L3?
I rather think you must specify the inductance in H(enry).

 

Are you sure that your program can read the value for the inductances L1-L3?
I rather think you must specify the inductance in H(enry).

Actually, I just followed this example below to use ".param" code with that inductance form:


So, the variables which were given in the examples such as "j0.5, j1.5 and j28" could be written in this form with LTspice?
and also here is the link that I followed to create this circuit:
https://electronics.stackexchange.c...uld-i-simulate-a-circuit-like-this-in-ltspice

 

Actually, I just followed this example below to use ".param" code with that inductance form:
View attachment 236118

So, the variables which were given in the examples such as "j0.5, j1.5 and j28" could be written in this form with LTspice?
and also here is the link that I followed to create this circuit:
https://electronics.stackexchange.c...uld-i-simulate-a-circuit-like-this-in-ltspice

OK, if it works - fine. I was not sure about it. Therefore my comment.

 

OK, if it works - fine. I was not sure about it. Therefore my comment.

Ah, I'm really glad to hear that it's work.
So, still playing on it via Ltspice I couldn't catch the root issue to cause those different outcomes

 

Hi,
I am unable to run the sim due to you having used models for your inductors.
Do you know the LTSpice equivalent inductance values, I can then use the LTS version.
R

Could you accomplish to run sir with my final asc. uploads :/

 

hi,
This what LTS reports on your 2nd circuit.
E
A clip of yours & mine
Note R1 & R2 difference

 

hi,
This what LTS reports on your 2nd circuit.
E
A clip of yours & mine
Note R1 & R2 difference

View attachment 236139

It seems that we have encountered the same outputs.
However, here in example 11.1 of the book which is "Electric Cİrcuits James W. Nilsson 10th Edition - page 425" says:


Unfortunately, when I compare my own asc results with this example answer that was already solved in the book is completely different.

Thus, I just got the problem with solving hand-drawn. I only stuck by testing it with the simulation.
I just thought that I could find the same results with that theoretical way...

 

hi,
Did you try a LTS sim with the actual Inductive values.?
This is what I get.

Could you post your hand calculated results.
E

 

hi,
Did you try a LTS sim with the actual Inductive values.?
This is what I get.

Could you post your hand-calculated results?
E

Yeah, let me try it with the inductive values.
My hand calculations were the same as the given answers column of the example. (I just learned how to solve it from the book yet. Due to the online lecture education, our teacher just gives us a duty to work alone. that is why this term is so harsh to get them with studying them from this book. To me, the calculation is not that much clear but I just really don't know that if that answer enough to get things clear)

 

I still could not figure out that the reason why I couldn't find out the same current and voltages with my ltspice asc. Anyways I'm really sorry to ask.

 

I'm confused.
Shouldn't the inductive impedance be jωΩ ohms, not jΩ?

 

I'm confused.
Shouldn't the inductive impedance be jωΩ ohms, not jΩ?

Yeah me too but why here this phasor single wave shows like that... Still don't get it.
Plus, i lost my hope

 

hi,
Did you try a LTS sim with the actual Inductive values.?
This is what I get.

Could you post your hand calculated results.
E

Heey sir it's me "cikalekli" (from turkey)
I just couldn't enter my previous account and that's why i needed to create a new one to ask a question.
I hope u re still doing ok during pandemic.
I just got the 2nd vaccine as well and hope i won't get in some troubles with the virus.

 

I'm confused.
Shouldn't the inductive impedance be jωΩ ohms, not jΩ?

I think the inductive impedance is jX=jωL given in [1/s * Vs/A = V/A = Ω ]

 

I think the inductive impedance is jX=jωL given in [1/s * Vs/A = V/A = Ω ]

Oh how could i imply this new version to ltspice with a .command