3000W Chinese Gensets Info.
professor95 wrote: EDIT ADDED 45/5/2013- When this thread started in March of 2005, I never expected to see it survive this long or amass the quantity of information that has been shared here. In...
Forum Discussion
This started on another thread after Wayne Dohnal made a comment about the synchronous generators and the infamous WFCO converter/charger used on so many RV's.
My fifth wheel has a PD converter/charger. IMHO, a big step up from a WFCO. But, the Volvo, which is a mini motor home inside, does have a WFCO. So, all testing was done on the Volvo.
I think you will find the scope patterns "interesting".
At Wayne’s prompting, I ran some waveform testing with my new Champion.
To get things started and establish a “standard” to work from I captured a waveform from our power company.
This is the sine wave of the power from Dominion Virginia Power to our home.
This is a 2000 watt Kipor digital inverter sine wave with NO load.
This shot is the Kipor digital wave when a 1,500 watt electric heater is plugged in as a load. I do not know what is causing the irregularity in the waveform.
The top photo is the Champ with NO load. The one under it is with a 1,500 watt heater as a load.
The signal does have some distortion, but it is primarily from the rotor spinning inside the stator and changing from each individual winding to the next. It is not EMF or RFI, or for that matter anything that should cause a problem in or around an RV. The appearance of the signal does not bother me in the least and there is nothing I would hesitate to connect to the power being supplied. No, it does not look like the “pure” sine waves above – but does it really need to?
This phase of testing was carried out on our Volvo VNL670 - which is actually a complete motor home. It has a 120 Volt 30 amp AC shore power connection, the infamous POS World Friendship Company (WFCO) charger/converter Wayne spoke about, 120 VAC air conditioning along with a refrigerator, TV, microwave and the other assorted power equipment expected. I am connected to the 30 amp outlet on the new synchronous (non inverter) Champ Category 5 ES/RC.
This is the power waveform from the generator through the Volvo’s transfer switch and breaker box to an inside outlet. The WFCO converter/charger is NOT turned on.
WOHA, what the heck is that? Looks like Wayne knows something about the WFCO converter/charger I don’t. All I did was turn it on and look at the clipping on the peak. Can’t say I know what is going on right now. This is something I will need to study further.
Everything is turned on that I can turn on -- air conditioner, TV, cup of water in the microwave, refrigerator. The waveform doesn’t change much, even when under full load.
These last two shots (below) are from my photo archives. They are from Brand X (JD) and a Brand Y (Nikota) Chinese generators built several years ago. Their signal is rough and one caused my microwave to run at double time due to it "thinking" polarity had switched from what The Wiz called avalanche. In any case, the zero crossing detector used in the microwave did not like the signal. Still, it powered everything else AOK.
The signal from the new Champ (and older models with 120 VAC only) is a tremendous improvement.
END
My fifth wheel has a PD converter/charger. IMHO, a big step up from a WFCO. But, the Volvo, which is a mini motor home inside, does have a WFCO. So, all testing was done on the Volvo.
I think you will find the scope patterns "interesting".
At Wayne’s prompting, I ran some waveform testing with my new Champion.
To get things started and establish a “standard” to work from I captured a waveform from our power company.
This is the sine wave of the power from Dominion Virginia Power to our home.
This is a 2000 watt Kipor digital inverter sine wave with NO load.
This shot is the Kipor digital wave when a 1,500 watt electric heater is plugged in as a load. I do not know what is causing the irregularity in the waveform.
The top photo is the Champ with NO load. The one under it is with a 1,500 watt heater as a load.
The signal does have some distortion, but it is primarily from the rotor spinning inside the stator and changing from each individual winding to the next. It is not EMF or RFI, or for that matter anything that should cause a problem in or around an RV. The appearance of the signal does not bother me in the least and there is nothing I would hesitate to connect to the power being supplied. No, it does not look like the “pure” sine waves above – but does it really need to?
This phase of testing was carried out on our Volvo VNL670 - which is actually a complete motor home. It has a 120 Volt 30 amp AC shore power connection, the infamous POS World Friendship Company (WFCO) charger/converter Wayne spoke about, 120 VAC air conditioning along with a refrigerator, TV, microwave and the other assorted power equipment expected. I am connected to the 30 amp outlet on the new synchronous (non inverter) Champ Category 5 ES/RC.
This is the power waveform from the generator through the Volvo’s transfer switch and breaker box to an inside outlet. The WFCO converter/charger is NOT turned on.
WOHA, what the heck is that? Looks like Wayne knows something about the WFCO converter/charger I don’t. All I did was turn it on and look at the clipping on the peak. Can’t say I know what is going on right now. This is something I will need to study further.
Everything is turned on that I can turn on -- air conditioner, TV, cup of water in the microwave, refrigerator. The waveform doesn’t change much, even when under full load.
These last two shots (below) are from my photo archives. They are from Brand X (JD) and a Brand Y (Nikota) Chinese generators built several years ago. Their signal is rough and one caused my microwave to run at double time due to it "thinking" polarity had switched from what The Wiz called avalanche. In any case, the zero crossing detector used in the microwave did not like the signal. Still, it powered everything else AOK.
The signal from the new Champ (and older models with 120 VAC only) is a tremendous improvement.
END
