The oscilloscope photos in the URL's mentioned
show the output waveforms with and without loads.
Yes, but you don't in fact get anything like the distortion
that you were going on about with unbalanced loads on
2 phase generators which aren't even relevant to the
particular generator and load being discussed.
As I indicated, and you apparently missed, it is
NOT necessary to have an unbalanced load on the
generator in order to produce a distorted waveform.
Didn't miss anything. The distortion actually seen with the
particular generator and load being discussed is nothing
like enough to be a problem with a well designed SMPS.
Also, it's a fair assumption that this 800 watt generator is
going to be powering more than one device while camping.
Yes, but that's not necessarily much of a load.
Besides the TV, there might be some lamps, a laptop
charger, satellite TV receiver, smartphone charger, inkjet
printer, and all the conveniences of portable modern living.
None of which are much of a load.
In general, the generator waveforms become more distorted with increased
load.
Duh. But even with all of those you listed, it
won't be a problem for a well designed SMPS.
As I previously suggested, some substantiation would be helpful.
You didn't provide any of that yourself until I rubbed your nose
in the fact that you never provided any yourself on your claim
about how SMPSs fail.
If you had impeccable credentials, were a recognized authority,
had previously demonstrated expertise in this area, and perhaps
were a Nobel Prize recipient, I might accept your unsubstantiated
judgments without question. However, lacking those requirements,
and being apparently only able to produce one-line erroneous
statements of negligible value, you do not qualify.
You in spades with your claim about how SMPSs fail.
Please explain why numerous articles on generator
to UPS compatibility should be ignored.
Because we arent discussing UPSs, we are discussing TVs instead.
In the past odd 20 years, I've run emergency generator versus
switching power supply problems many times. My favorite was while
working with computahs at a medical billing office. Someone dragged
in a Genrac 8kw(?) generator and wired it to a transfer box. It was a
professionally done installation by a licensed electrician. I
stupidly suggested we do a dry run with the building on full power,
and was immediately assigned the task. The day arrived, the big
switch was thrown, the generator started immediately, and about 30
assorted UPS backup power supplies beeped a few times, and shut
down in self defense. That powered down all the servers and
network hardware, which effectively shut down the network.
Completely and utterly irrelevant to what was being discussed,
that PARTICULAR generator mentioned in the subject and a TV.
On the APC SmartUPS line (as opposed to the BackUPS line), there
is a switch to reduce the sensitivity to input waveform distortion.
We went around flipping switches and rebooting servers (after a 30
minutes file system check). When everything was back up and running,
the power was again switched off, and again all the UPS's shut down.
Completely and utterly irrelevant to what was being discussed,
that PARTICULAR generator mentioned in the subject and a TV.
I drove to my palatial office and back with an oscilloscope to look at
the waveform. Even without a load, it looked something like this:
<
http://www.electronicproducts.com/images2/fapo_Falcon01_mar2009.gif>
When I added all the non-computer loads to the Genrac generator, the
waveform became asymmetrical, because the load was not balanced
between the two phases. My clamp-on ammeter showed about 10A on one
leg and 7A on the other. It didn't take much to cause problems.
After about 8 power fail simulations, we were never able to bring
everything back up gracefully on generator power. It wasn't just the
UPS's that were having issues. The DVR for the security camera
systems refused to run. The wall warts for powering some Netgear
switches blew up and had to be replaced. Several CRT monitors acted
strangely and refused to produce a stable display. The Lucent phone
system would go into protection mode intermittently.
After the exercise was over, I elected to restore two of the servers
from backup tapes, because I didn't want to take the chance that all
the power thrashing had caused any data corruption. That took most of
the night. When business resumed on Monday, it was soon discovered
that the one server that I did NOT restore, had some minor data
corruption.
There was no way the office was going to run on this 6kw(?) generator.
The generator was removed, permits arranged, and a rather monstrous
and expensive 25kw diesel generator was installed. Attached to the
power leads was a large box full of low pass filter components to
remove spikes. I didn't need to look at the waveforms as it ran the
various UPS devices and switching power supplies perfectly.
All completely and utterly irrelevant to what was being discussed,
that PARTICULAR generator mentioned in the subject and a TV.
You don't know what I know.
I do know that you were rabbiting on about
two phase generators and UPSs that have
NOTHING to do with what the OP asked about.
True. You haven't learned anything.
Yep, none of the irrelevant shit you posted is any news to me.
I judge people by their willingness and abilities to learn.
No one give a flying red **** how you stupidly 'judge' people.
Particularly when you keep raving on about about situations that
have NOTHING to do with what was actually being discussed.
Everyone can see for themselves that you are lying.
<reams of your puerile attempts at insults that any 2 year
old could leave for dead flushed where they belong>
