Re: Remote Tuned Primary (RTP) ideas...
Tesla List wrote:
> Original Poster: Terry Fritz <twftesla-at-uswest-dot-net>
> Hi All,
> < big snip >
> 2. There is one serious problem I have found. Most small relays have
> little isolation distance between the switch elements and the coil. An arc
> to the coil will probably blow up the control electronics (fiber optics
> prevents such a thing from blowing the operator ;-)). Some small "safety
> relays" have a large distance between the coil and the switches that should
> work good. They are usually pricey but they have cheap cousins. However,
> perhaps someone knows of a perfect relay for such a use?? Big power
> contactors would be great but they are really too big for such a use.
> 3. I would think there would be a cheap high voltage oil (or whatever)
> relay out there somewhere??? Kilovac makes HV reed relays (vacuum) but I
> think they would be over voltage and under current for this. Is there a
> better commercial relay I could get for not too much money that would solve
> the problem straight away??? I would think a small high voltage oil relay
> would be cheap and easy to make commercially??? I have thought of putting
> the relays in a super high vacuum but that seems far too hard for me. The
> specs are: 30KV isolation and switching, 100kHz, 2 amps RMS, and 70 amps
> peak. The fiber optic cable isolation allows these specs to be abused
> wildly ;-)
They may not be high voltage rated but have you considered electric forklift
contactors. We have a Lansing-bagnall forklift at work which I - ahem -
to increase speed - I was very surprised by the size of the main
carry huge amounts of current and, more importantly, have a large gap
contact points themselves, they run off the same supply as the drive
i.e. 12 volts in my case.
Just a thought.
Robin Copini in OZ.