Re: Help with PWM and SSR desperatly beeded
.. I can only guess there is insufficient current to operate both SSRs but still enough to make their LEDs light up...
Thanks guys (a lot!)
Tried different resistors and with 330 nothing 'pulled' and 249 Ohm the issues was the same as before (one pulled).
noticed in certain combinations that both SSR's failed to bull, especially when one SSR was connected direct to PWM and the other via resistor (just a panic test).
Either way I connected another DC power to PWM (14.4V) and by that powered the fan (computerfan) separatly.
Now - with the 249Ohem resistors both pulled, with 68bOhm only one and 330 Ohm none pulled.
The conclusion is that it seems to work and it was lack of power to PWNin combination with lack of resistors.
Issue seems solved but still dont understand..
Either way - I now realize that my device does not fulfill the purpose.
In my application I have 2 X 2.3kW heating elements for vort boiling, these are on different SSR's and fuses as said above.
I like to control them as when fully on they give 2.3kW but I can regulate down both to where the vort is boling nice - rolling but not pushing..
Now when my system is working can see that I can get only 50% of 2.3kW (at best) so even in full speed it seems that I get 50% loss - can only assume ut has to do with AC cycles..
Is there a better way to regulate heating power than PWM and SSR's?
Perhaps another thread..
Thanks a lot for help!