Termination of an ultra low resistance circuit
Termination of an ultra low resistance circuit
(OP)
I need to make up an ultra low resistance circuit in a loop (below 40 micro ohms) with multi-stranded copper wire like Litz wire.
I estimate total circuit length needs to be a around 400 mm. Based on this the litz wire needs to be a large cross sectional area.
My major concern is the termination at the ends of wire would increase the overall resistance of the circuit. Soldering seems to be the most obvious but I am not sure how to calculate the resistance of the soldered joint. Also how reliably can I make a soldered joint at a termination of 1000s of small copper wires. Thankfully the termination does not have to be multi stranded. In fact the multi stranded parts of circuit only needs to be two short sections. The remainder could be solid copper. However this would increase necessary terminations to four instead of one.
This is not the usual application of litz wire.
Is soldering the best method and how should I go about soldering a large bundle of wires? How could I estimate resistance of termination?
Any suggestions welcome.
Thanks
I estimate total circuit length needs to be a around 400 mm. Based on this the litz wire needs to be a large cross sectional area.
My major concern is the termination at the ends of wire would increase the overall resistance of the circuit. Soldering seems to be the most obvious but I am not sure how to calculate the resistance of the soldered joint. Also how reliably can I make a soldered joint at a termination of 1000s of small copper wires. Thankfully the termination does not have to be multi stranded. In fact the multi stranded parts of circuit only needs to be two short sections. The remainder could be solid copper. However this would increase necessary terminations to four instead of one.
This is not the usual application of litz wire.
Is soldering the best method and how should I go about soldering a large bundle of wires? How could I estimate resistance of termination?
Any suggestions welcome.
Thanks





RE: Termination of an ultra low resistance circuit
I'd think the hard part is cleaning the insulation from the individual conductors of the Litz wire.
Mike Halloran
Pembroke Pines, FL, USA
RE: Termination of an ultra low resistance circuit
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If we learn from our mistakes I'm getting a great education!
RE: Termination of an ultra low resistance circuit
RE: Termination of an ultra low resistance circuit
What is the normal procedure for terminating Litz wire in any application? I would assume maybe there is some chemical solution that could be used to strip the insulation off a suitable length at the end? Else could try to use something like sandpaper but that seems cumbersome and error prone if there are large numbers of strands.
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RE: Termination of an ultra low resistance circuit
Gunnar Englund
www.gke.org
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100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: Termination of an ultra low resistance circuit