whew I'll give you a dollar plus shipping for them transformers lol!!!

I hear tell they are worth a mint in copper scrap price...

My 2 cents - re:fried inverters.......it might be worth using 120V AC rectified as your test bench and iron out the bugs first. This at least will also allow us to provide as much or as little power as needed, then once we have the bugs out, implement using an inverter. It is possible we need more than 300 Watts - using rectified mains AC will allow us to dial up what we need and test.

Has anyone tried delivering say 500 Watts per plug to see the effect?

Quote from: jstadwater on September 23, 2008, 02:46:08 PM
@Greg

Thank you, and no it's not at all confusing now. The only request I have is, could you briefly touch on how and what type isolation transformer you are using? What role does it play exactly, and since I don't CURRENTLY have one, could this keep me from frying inverters on a daily basis. Sorry for asking if you have already answered these questions somewhere else.

Later.....................Mike

Hi Mike,

The isolation transformer disassociates commons and hots and such electrically so that you can tie them the way you want them.  In the CDI circuit, it allows me to tie battery(chasis) minus, and the HV rectifier minus together, switch on the minus side of the CDI Cap and Coil and also tie all of the plus sides of everything (CDI Cap, Storage Cap, Coil, and HV)  together as a common without worrying what the inverter is doing.  Besides eliminating grounding conflicts with the inverter, it further isolates the plasma effect from the CDI Cap switching to prevent cross coupling or cross fire.  I don't know how an isolation transformer could be applied to a Nexus circuit, but I suggested that one be used to help isolate the inverters from ground conflicts.  Usually when you hear one of those inverters squealing then self destructing it's usually a severe ground fault.

The isolation transformer I'm using is a 150VA 115VAC - 115VAC plugged right into the inverter.  The inverter is a 400 watt modified sine wave inverter.  Usually if you want to run a transformer on an inverter you choose a transformer with 1/2 or less of the power rating of the inverter.  I got it out of McMaster-Carr. p/n 70245K71

Also try the suggestion from another member who suggested to use utility power until you have your conflict straightened out.  It's allot cheaper than investing in an inverter company.

Phew! hope this helps.

Greg

@nyloncylon,

I have decided to use my 10mH coil because that is what I have. Bill said he needed to reduce
the current so that the spark plugs do not burn together. I guess that any coil of some size will
do. I have NOT tested the circuit on my car yet so it is hard to say exactly what size coil is needed.

Groundloop.

Quote from: plasmastudent77 on September 23, 2008, 08:06:16 PM
My 2 cents - re:fried inverters.......it might be worth using 120V AC rectified as your test bench and iron out the bugs first. This at least will also allow us to provide as much or as little power as needed, then once we have the bugs out, implement using an inverter. It is possible we need more than 300 Watts - using rectified mains AC will allow us to dial up what we need and test.

Has anyone tried delivering say 500 Watts per plug to see the effect?

Yes, correct plasmastudent77, please everyone!!!... do not use your inverter to test a new circuit. I have said this many times before, just use a minimum 10 amp full wave bridge plugged in the AC grid and test your circuit with that first. Once you know for sure it's all working then instead of getting a really long extension cord to drive around use an inverter.

Luc