Re: Don Klipstein = Fucking Half witted LIAR

In article <1201573233.234800@ftpsrv1>, Terry Given wrote:
Don Klipstein wrote:
In article <6066nmF1p24qgU1@xxxxxxxxxxxxxxxxxx>, Phil Allison wrote:

Don Klipstein = Fucking Half witted LIAR "

I have actually dissected some of these. I only saw much bigger,
usually 47 uF with clear lack of a decimal point.

** COMPLETE BOLLOCKS.

Also, 4.7 uF discharging 100 mA will have voltage decline by 212 volts
per millisecond.

Decimal point error on my part - make that 21.2 volts per millisecond.
It still won't make that much of a filter of rectified 120V 60 Hz.

I knid of think thats the idea. lousy filtering = truckloads of
100/120Hz, but if the circuit/lamp can cope with that, it makes the PF
less bad. and can help reduce ripple current - not that it will help for
*** Hing capacitors

aside: years back we all got a giggle out of a taiwan components
magazine - there was an add for "*** Hing Connectors"

I suspect some of those "high power factor" CFLs have very little filter
capacitance, like a mere power supply bypass capacitor to suck out some of
the glitches that the circuit puts across the supply rails. I don't have
any actual experience with these. I have heard that dimmable CFLs are
high power factor ones - I don't know how true this is, and for that
matter how true the converse is.

I also know that making the filter capacitor bigger makes the ripple
current bigger - and I seem to think at a rate close to the ripple current
capacity being bigger.

If power factor is increased only by making the filter capacitor
smaller, as opposed to using your controlled boost converter, then the
lamp will have the 120 Hz (or 100 Hz) flicker that fluorescents without
electronic ballasts have. I hear that there are some people who are
sensitive to this, although I suspect few.


One more thing I heard: Not all harmonics are equally bad. Where the
power system is 3-phase wye, harmonics of multiples of 3 are bad for
coming back through the neutral in phase from all three phases (assuming
the harmonic-offending loads on all 3 phases are alike in phase
relationship of generation of multiples-of-3 harmonics).
I seem to think that delta is more common than wye for power
distribution, however. I seem to think tht wye is a scheme in many
buildings, with 277V lighting circuits. I also saw "star" 3-phase power
in buildings, as in three 240V center-tap phases connected together.
Gives two 208 volt deltas, except only one if one of the phases has one
end rather than the center connected to neutral ("high leg" or "wild
leg").

- Don Klipstein (don@xxxxxxxxx)
.

Quantcast