Re: [EVGRAY] Sweet spot

Body

Warren is the term Golden motor a term that just you use or is it that name
in general ? Oh thinks for the 150 watt motor tip .

On Thursday, March 7, 2019, Mick [email protected] [EVGRAY] <
[email protected]> wrote:

>
>
> Warren,
>
> You may want to limit the voltage going to the variac with some GDT's and
> use the excess the charge caps as the spikes from the magneto effect can
> cause enough voltage to punch through the varnish on your variac autoformer.
> These devices are not designed for voltages above the dielectric breakdown
> which can be a couple thousand volts, not at all hard to reach specially if
> switching the little motor through fast speed changes or switching the
> output by shorting the coils.  Current capacity may have little to do with
> it as it does not sound as if you had a load beyond the ability of the
> first autoformer.
> On 3/6/2019 6:30 PM, Warren Keillor [email protected]
> [EVGRAY] wrote:
>
>
>
> Doug
> I hope you can see the simple apparatus and arrangement I put together to
> try to find that sweet spot on the rpm range on my other email.
> The rpm was quite high compared to any bicycle wheel speeds, one could
> ever reach.
> I may well of travelled through the correct speed ande not known it since
> I was just doing a machinery check out. In storage, snow had gotten into
> the golden motor and it was seized up, so I had to take it apart, clean it,
> lube it, and put it back together.
> I thought I better check it out today doing a full speed run using a
> little load, a 40 watt incandescent  light bulb, and see how fast it could
> go.
> The range is good but needs a bigger variac, like my 30 amp, that I never
> consider load with, until I have to carry it across the barn yard in the
> snow.
> I have learned my lesson not to be lazy.
> Cheers Warren
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> 
>