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
LittleBill wrote:
it looks like a feild diode going into avalanche, and then recovering.
At this point, I believe LittleBill has the most logical answer.
Try this: Go to Harbor Freight's web site. http://www.harborfreight.com
Where it wants a product model number type in 91213 - this is for a JD generator similar to the ELM3000(L).
Scroll down to the bottom of the 91213 listing and select download the PDF version of the parts manual.
Go to page 22 of the manual and look at the schematic diagram.
I strongly suspect D1 and D2 are avalanche diodes acting as voltage regulators. The initial spike in the waveform is the rapid rise in voltage. The diode supplies avalanche breakdown at this point, conducting the excess voltage past R1 and R2.
I am not positive on this........... Avalanche diodes are not something I use on a regular basis. I also intend to do some more research on brushless alternator theory before I stand up and say this is exactly what is happening.
In any event, I do not see the deviation as harmful to any equipment. "It ain't no pure sine wave", but your RV appliances will never know the difference.
So, tech guys, what do you think?
