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I posted an example file under temp, the file is "Switch_test.asc"

I thank you Andy, but i've made a small circuit with one switch ON and another OFF and they work exactly the same, so i don't understand the difference. Enrico

Hello, LTspice accepts any file name for models. Even a filename like partho.duet would be OK. Best regards, Helmut

Thanks John. I Find out BC547 but there have no spice model of bc547 in Fairchild Semiconductor. I downloaded BC548 spice model but this file is .mod format. can I use it? If not how can I find out

Enrico wrote, "I cannot understad the functionality of this statements. Nothing from help, could someone explain that?" When a switch is "on" it means the switch is closed, or the switch contacts are

Business Kid, Yes: You are very OT as you don’t answer to questions. Sorry if you had never could understand W 98. Don’t you know that W 7 is just like Vista SR2? I don’t agree with you at all.

In message <l8vtuh+10srk7j@...>, dated Thu, 19 Dec 2013, smalcolmbrown@... writes: The main issue is to get the thin laminations you need for 500 Hz. I suppose they are available,

Then you have got the voltage wrong. 36V ac translates as 50.9V amplitude. Does it? Modify the simulate statement for .tran 0 100 99.98 You will see that all the problems you see in the first seconds,

Le 19/12/2013 23:02, John Woodgate a crit : In the absence of VA rating, it is presomptuous to venture a judgement whether the magnetizing current is too high or too small. Making the magnetizing

Thank you John The three phase is 36Vac 500Hz which really chucks a spanner in the transformer design. Doubly so as I have no component values to go on from the schematics and the descriptive text is

In message <l8vmqj+1p9b1hj@...>, dated Thu, 19 Dec 2013, sawreyrw@... writes: I mean the 500 mA, not the 400 A in the original simulation. And the 'DC component' doesn't go away

John, That current is correct. It is due to the start up transient and the DC component will eventually go to 0. Whether the magnetizing inductance is too low depends on the VA rating of the

In message <l8vjeg+tmtpa2@...>, dated Thu, 19 Dec 2013, smalcolmbrown@... writes: I didn't realise that by 'lopsided' you meant that the waveform appeared to have a large DC

Thank you sawreyrw That really solved that one. I am glad that it is a simple fix :) Thank you John For confirming what I thought was correct. :) Thank you Jerry Lee Marcel For also confirming another

In message <l8vch8+10ue8vj@...>, dated Thu, 19 Dec 2013, smalcolmbrown@... writes: There should not be a 'lop-sided' waveform anywhere. Whatever you do with adding and subtracting

Suusi, What is happening is the voltage across the primary is not 0 at time=0, so you have a huge primary current at time=0. Due to the long time constant it takes a long time for the primary

Sri, just a test, i don't see my messages. Rudi --- Ce courrier électronique ne contient aucun virus ou logiciel malveillant parce que la protection avast! Antivirus est active. http://www.avast.com

What do you mean "lopsided waveform"? The traces I see are perfectly correct. Indeed you can't take what happens at time-zero for granted, it could never happen in real life. Nature hates

The question is is the lopsided waveform between ~A and ground an accurate representation of a winding connected across a across any two of the phases? I was under the impression that the output was

This problem in the topic is long solved, but . . . The last windows I ran and maintained was windows 98. If one reinstalled or updated like that, junk seemed to collect, such that such that one