Re: SRSG break rate

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

Original poster: "Steve White by way of Terry Fritz <twftesla-at-qwest-dot-net>" <slwhite-at-zeus.ia-dot-net>

Yes, I know the transformer is still supplying power from 90 degrees to 180
degrees. The cap, after discharging at 90 degrees (in microseconds),
immediately begins recharging shortly after the 90 degree point and
continues charging up until the 180 degree point where it is again
discharged. There is no waste of transformer power. Thus I stand by my
statement.

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Thursday, June 21, 2001 5:29 PM
Subject: Re: SRSG break rate


> Original poster: "Malcolm Watts by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <m.j.watts-at-massey.ac.nz>
>
> Hi Steve,
>
> On 21 Jun 01, at 7:49, Tesla list wrote:
>
> > 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.
>
> At this point, the cap is now empty, some energy is stored in the
> ballast inductance (not a lot) and the transformer is still supplying
> power between 90 and 180 degrees. Do you still consider your last
> statement to be valid?
>
> Regards,
> malcolm
>
>  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.
> >
> >
> >
> >
>
>
>
>
>