Re: SRSG break rate

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "R.E.Burnett by way of Terry Fritz <twftesla-at-qwest-dot-net>" <R.E.Burnett-at-newcastle.ac.uk>


Hi Steve, all,

This is my understanding of 200BPS operation too.
You can see real charging waveforms for 100BPS and 200BPS here:

	www.staff.ncl.ac.uk/r.e.burnett/wavefrms.html

Also, this page shows the charging behaviour relative to the mains sine:

	www.staff.ncl.ac.uk/r.e.burnett/offset.html

You could use any BPS that you want,  but 200BPS is the highest rate that
gives equal "full-size" bangs only.  Going to a higher break rate results
in some firings at lower voltages unless one goes to great lengths to
space the electrodes unevenly.  Generation of these "runt" firings seems
inefficient use of the power to me ???
							Cheers,

							-Richie,

> Original poster: "Steve White by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<slwhite-at-zeus.ia-dot-net>
> 
> I have been following the posts on SRSG break rates. Some people seem to
think
> 100 BPS (50 HZ) or 120 BPS (60 HZ) is best. It seems to me that 200 BPS
(50 HZ)
> or 240 BPS (60 HZ) would be optimum. Here is why I think this. If you
examine a
> single cycle of sine wave, there are 4 positions of maximum charging for a
> capacitor. During the first 1/4 cycle (starting at 0 degrees), the cap would
> reach its peak charge at about the 90 degree point of the sine wave. At this
> point the cap should be discharged. Continuing to charge the cap past 90
> degrees without discharge would not charge the cap any further because the
> voltage is now decreasing towards 0 at the 180 degree point. After
discharging
> at the 90 degree point, the charge cycle can begin again at the peak voltage
> and continue charging until the 180 degree point is reached. At this
point, the
> cap should again be discharged because after the 180 degree point, the
voltage
> will go negative and the cap will not reach any higher charge. 2 more
discharge
> points can be identified for the negative voltage at the 270 and 360 degree
> positions. This reasoning assumes that the transformer can supply sufficient
> current to fully charge the cap in 1/4 cycle. If not, then higher break rates
> may be better.
> 
> 
> 
>