Feature Request: Capacitor and Inductor ESR values

[K4czu5]

Could you add ESR factor to capacitor and inductor? It would be helpful in more advanced schematics where placing resistor and other component is inconvenient.

Thanks in advance.

[pfalstad]

Equivalent series resistance? That probably wouldn't be that hard. Adding a small default series resistance to all capacitors and inductors might solve some other issues, too (like capacitor loops, etc).

[K4czu5]

Yes, that's it. Thank you, very good work, keep it up

[Exaeta]

Please add a few different capacitor parameters:

Type:

Aluminium Electrolytic Tantalum Ceramic Polyester (aka Mylar) Polypropylene Custom

There is usually also a small series inductance and a large resistance across the plates, which varies with applied type. I find myself always adding these things manually. Custom is just where you can set ESR and ESI directly etc.

[ormaaj]

I'd guess @Exaeta is right and a bit of series inductance ought to be closer to reality. A capacitor being a big sheet of metal internally ought to have effectively zero DC resistance and the entire illusion of resistance has to be electromagnetic effects.

I know that a datasheet for most decent capacitors specifies the frequency for which an "ESR" is valid.

Edit: but inductors are really nasty at the moment and tend to lock up the sim indefinitely while the halting problem solver churns. That needs either vast improvement or a timeout or I wouldn't want inductors all over the place.

Edit2: Bleh and unstoppable oscillation all over. Duh who'd have seen that coming?

[Exaeta]

@ormaaj The series inductance is a lot lower than you might think, but it is there. There's a lot more resistance.

Also I'd love to see inductors become less laggy. :) Trying to solve them based on energy-in energy-out and conservation of energy might give a close enough approximation that you don't need complex solvers. They have a DC bias magnetization and you can approximate them linearly.