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...
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walkers2rad wrote:
It meaures the load via those two hand made looking doughnuts you see there (I think) to tell it where to run the throttle and cut off the load if necessary.
Those appear to be toroidal inductors. Very likely powdered iron inductors used to filter the output of the inverter to smooth the PWM waveform.
The current measurement circuit can be really small in inverter circuits, likely in the block with the switching transistors under all that epoxy. This can be hall effect, resistance, or using a current sense MOSFET.
walkers2rad wrote:
There are some possibly servicable caps there, some probably for filtering of the a/c noise or smoothing voltages.
The one large cap is an electrolytic. Most likely it's the bus cap that filters the DC bus between the rectifier and inverter. If it goes, it's going to do a bunch of damage. They don't fail nicely.
walkers2rad wrote:
Beyond that if it stops doing what it does you probably have the rest to part out unless you find another part you are willing to pay for.
The nature of power electronics is that if it fails, it fails spectacularly. If it goes, expect the plastic / epoxy box to be a nasty, foul smelling sooty block of charcoal.
