ScottG wrote: It's hard for me to imagine the Honda would run at it's idle speed running an AC.
I've done some testing and I've never been able to get it to run my 13.5 AC at idle. My EU2000 "will" start and run the AC, but it does so a wide open throttle. I don't really recommend it.
Interesting thread indeed. I surely would however like to see the traces repeated including chop when the A/C is restarted under high head conditions. This is without question the mode that causes most inverter and compressor motor burnout.
Thank you for the link, it proves people are thinking outside the $19.95 multimeter realm.
Wayne Dohnal wrote: And why doesn't anybody ever seem to think that running a 1,000 microwave, which draws more than many 13,500 btuh air conditioners, abuses the microwave or generator?
If the generator struggled as much running the microwave as it did the air conditioner in the video, I wouldn't use it for that purpose either and for the same reason.
A true sinusoidal 120 vac source will exhibit a peak to peak voltage relationship of voltage times 141.4% =
The AREA UNDER CURVE of a properly propagated sinusoidal waveform at 141.4% of RMS is the one-and-only-single-solitary-lonesome way to determine THE ACTUAL POWER in watts POTENTIAL of that waveform.
It gets worse. Devices that induce inductive reactance like transformers, and armatures are EXCEEDINGLY sensitive to waveform area under curve totals in the 80+% amplitude and above range.
In a word, small conventional generators suck for developing design specification work output potentials. A 40 amp 12 volt transformer battery charger tops out at 28 amps on a 2,000 watt generator. Why? Twenty two amps at twelve volts is only 264 watts.
UNDER LOAD, under maximum starting current when a phase will warp like a boa constrictor in mating season, you MUST observe a waveform WITH AN OSCILLOSCOPE to both understand and appreciate what you are asking of a generator; Be it conventional or inverter type. You have to see what those waveform peaks ARE NOT DOING.
My test with a glass of water in a microwave is a heck of a lot more sophisticated than it seems on the surface. We engineers have to think this way, be clever enough to translate an esoteric exercise into terms that a layman can understand and appreciate. If your microwave does not heat a glass of water using a generator or inverter as fast as when connected to shore power YET RMS METER VOLTAGES SEEM SIMILAR, then you are dealing with clipped sine wave peaks and or phase distortion. DANGER WILL ROBINSON! DANGER! Let's see what the new Magnum inverter does. God, I'd like to get my hands on one for a test. My new TEKTRONIX would eat this up :-)
And I haven't even touched upon harmonic waveform distortion. Some of these tests are similar to a group of goat herders trying to determine critical mass with a slug of plutonium and an unwilling goat: (well at least it seems that way to me :-( )
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If you want to see scope traces of an eu2000i starting a circular saw, check out this post: eu2000i post in Champion thread. A 13,500 btuh air conditioner is of course a heavier load. What relevant in this post is (1) That the eu2000i holds its waveform pretty well during the startup sequence, and (2) The eu2000i can supply about 30 amps (rms) for the first few half cycles, after which the maximum current ramps downward.
2009 Fleetwood Icon 24A
Honda Fit dinghy with US Gear brake system
LinkPro battery monitor - EU2000i generator
There are numerous documents on the Internet about the harm caused by steady-state low voltage motor operation. Can anybody find any real data for startup-only voltage dips? I'm not claiming any expertise because I'm not a motor engineer, but before I embrace them, I'd like the abuse claims backed up by more than seemingly logical conclusions.
Since, by your own admission, you are not an engineer, it is going to be very difficult to offer an explanation that would satisfy you from an electrical engineering standpoint. If you want logic, consider this.
RV air conditioners have been in use now for several decades. I owned my first one in about 1984. The desire to operate these air conditioners with a generator has been around as long as the air conditioners themselves. If getting low power generators to work reliably with RV air conditioners were as easy as swapping out a $6 electrolytic capacitor, don't you think that the manufacturers would have done so by now? There is no such thing as a free lunch - at least if you want the lunch to be a healthy one.
Quote: Is it an issue when your blood pressure should drop to say 80 / 40 for just one second?
I can't image what blood pressure has to do with motors, but is it an issue when a Reduced Voltage Motor Starter is used? These devices are widely used with larger motors, and do exactly what is being claimed as "abuse" in this thread. Are thousands and thousands of very expensive motors being routinely and knowingly abused by devices from large companies with engineers who actually know about motors? The main application is industrial motors but they're also used in newer home central vacs, which have about the same power requirement as an RV air conditioner. It keeps the lights from dimming when the vac is turned on.
There are numerous documents on the Internet about the harm caused by steady-state low voltage motor operation. Can anybody find any real data for startup-only voltage dips? I'm not claiming any expertise because I'm not a motor engineer, but before I embrace them, I'd like the abuse claims backed up by more than seemingly logical conclusions.
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