walid Posted May 17, 2007 Report Share Posted May 17, 2007 Hiplease I want the program to simulate in electronics to perform some tests on the transmitter and receiver thanks Quote Link to comment Share on other sites More sharing options...
audioguru Posted May 17, 2007 Report Share Posted May 17, 2007 Hi Walid,I am learning the Sw CAD III simulation program by Linear Technology Corp. It is free.It has a pretty big library of components and it is updated frequently. There are a few websites with add-on P-Spice models for many more components for it. Quote Link to comment Share on other sites More sharing options...
Steve_hi Posted May 17, 2007 Report Share Posted May 17, 2007 http://www.linear.com/designtools/software/switchercad.jsp Quote Link to comment Share on other sites More sharing options...
Master_Ianick Posted May 17, 2007 Report Share Posted May 17, 2007 hi, you can get MULTISIM 9! That is very good and very simple program to simulate circuits..try :DGoodLuck!:D Quote Link to comment Share on other sites More sharing options...
walid Posted May 17, 2007 Author Report Share Posted May 17, 2007 hi guruIt has a pretty big library of components not at all, for example there is no variable cap and no transformer .....how to get these parts?To Master_Ianick , thank you very muchTo Steve_hi , thank you very much Quote Link to comment Share on other sites More sharing options...
AN920 Posted May 17, 2007 Report Share Posted May 17, 2007 In help files of SWcad Quote Link to comment Share on other sites More sharing options...
walid Posted May 18, 2007 Author Report Share Posted May 18, 2007 Hi AN920You are good person , I benefited greatly from your help, thank you from the bottom of my heart .What if I want to make a center tapped transformer at one side, how to simulate it. Quote Link to comment Share on other sites More sharing options...
AN920 Posted May 18, 2007 Report Share Posted May 18, 2007 Hope this helps.* L1 N003 0 1mHV1 N003 0 SINE(0 100 1000) AC 10 0 Rser=10L2 N001 0 100 Quote Link to comment Share on other sites More sharing options...
AN920 Posted May 18, 2007 Report Share Posted May 18, 2007 If you wanted the circuits to be isolated, you may do something like this. Spice needs to see some path to circuit GND otherwise you will get an error. You may make the resistor much higher in value. Quote Link to comment Share on other sites More sharing options...
walid Posted May 18, 2007 Author Report Share Posted May 18, 2007 Dear AN920, I do not find the right words to express to you my deepest thanks and respect. thank you very much.questions:(1)The transformer Comprising L1, L2 and L3 have DOT at the bottom of each coil. I remember I studied something of this kind before, but now I forgot its purpose, can u please tell me, and what happen if we reverse one of them?(2)I see a command line: K1 L1 L2 L31, i know K1 is the mutual inductance and L31 is the inductance affect L3 due to current pass through L1. but how to write this command and how to choose those values? NOTE: There is a small problem in the program which is the nodes numbers that appear in the graph didnot shown in the circuit, and one can't know some graph belong any node. Thanhs Quote Link to comment Share on other sites More sharing options...
audioguru Posted May 18, 2007 Report Share Posted May 18, 2007 NOTE: There is a small problem in the program which is the nodes numbers that appear in the graph didnot shown in the circuit, and one can't know some graph belong any node. I also noticed that the node numbers are not shown on the schematic. Quote Link to comment Share on other sites More sharing options...
AN920 Posted May 18, 2007 Report Share Posted May 18, 2007 I am not an expert with this program as I hardly ever use it. I find the user interface too clumsy and drawing large schematics a pain. There should be some option to display the node numbers on the diagram. You can go "view spice netlist" as another option.The dots indicate the phasing of the coupled inductors.From help fileK. Mutual InductanceSymbol Names: None, this is placed as text on the schematic.Syntax: Kxxx L1 L2 [L3 ...] <coefficient>L1 and L2 are the names of inductors in the circuit. The mutual coupling coefficient must be in the range of -1 to 1.The lineK1 L1 L2 L3 L4 1.is synonymous with the six linesK1 L1 L2 1.K2 L2 L3 1.K3 L3 L4 1.K4 L1 L3 1.K5 L2 L4 1.K6 L1 L4 1.It is recommended to start with a mutual coupling coefficient equal to 1. This will eliminate leakage inductance that can ring at extremely high frequencies if damping is not supplied and slow the simulation. However, a mutual inductance value of -1 or 1 can lead to simulation difficulties if the uic directive is flagged on the .tran card. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.