[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: Greg Leyh's new coils was Re: 20 joules..

Original poster: Greg Leyh <lod@xxxxxxxxxxx>



Original poster: Steve Conner <steve@xxxxxxxxxxxx>

> The next secondary coil that I'm working on will
> have convolutes on
> the outer casing, like this:

Cool!!!!! That looks like Ultra-Rib corrugated PVC
drain pipe to me. I've used it for draining MTB
trails, but never thought to make a bushing out of it.

If it is Ultra-Rib, then IIRC it has a double skin and
the "ribs" are hollow and full of air. If so, what did
you do about this? Did you cut the inner skin away
and/or fill things with oil or epoxy? Or do you think
it will be OK with the air?


I think the air inside the ribs will be fine, provided that it can circulate. The ribs are actually fairly volumous, and each rib has two vent holes for air circulation and drainage of condensation. The double-wall structure and rib cavities supported 80kVDC placed between inner and outer walls in a hi-pot test for 15 minutes without injury.

If it isn't drain pipe, but some ultra-expensive
high-tech material, I apologize in advance :-/

Is the black colouring OK with high voltage?

BTW, I love the "primary drive unit", it looks like an
eight-barrelled OLTC2 :))) I think I see water cooling
pipes poking out of it?

Steve Conner


The black colouring in HDPE doesn't appear to compromise it's dielectric strength. Yes, the primary switch uses a water-cooled substrate, connected to a plastic motorcycle radiator. I'm not quite certain whether the water will be necessary, but it's there just in case. The Secondary Energy Recovery scheme will increase the switch dissipation somewhat, but should reduce overall power consumption considerably.

-GL