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For some reason I don't see the two attachments I attached in the first message. I link them again in case it is the same for you. The problem is that the regulator on LTspice works well while in the diagram in the image the voltmeters give a reading error "nan".
The title is unclear because I didn't have a chance to edit it once it was sent and I forgot to correct it before publishing it. I can only edit the body of the message.
The resistor between AC to ground does not have succes. I had try vsine , alternator and generator/AC . In any case not work. Normally I simulate with LTspice, then sometimes next with proteus and eventually if everything is ok I draw with Kicad. I know that Kicad could do simulation but it is a function that does not seem to me to be fully integrated yet. I hope it will become one in the future because it would also be great for studying.
@FvM can you confirm the problem is in the generators and not in diodes/rectifiers? Can be solved?
Often this is due to a built-in calculation in a "callback" that figures a model property based on instance (symbol) properties. If any of them are not-set or fail to evaluate due to insane values (like a "/0" from a defaulted empty field) then NaN is what you get.
So I'd look real carefully at instance properties, especially ones left empty or given a variable name instead of numeric arguments.
Hi,now it seems to be ok although the voltage at the voltage after the diodes should be higher. It also works without putting the resistor on the AC to ground. The strange is that yesterday it didn't even work with resistors. I haven't changed anything in the schematic but just tried to remove the resistors. All the components used have their own SPICE model and the rectifier is made by four 1N4004.