Hi Group.
I am totally thrilled to find this forum. (I followed a link on rocketboy's site).
After drooling over a listeroid for 8 months, I purchased a Changfa 195 from Joel on ebay in hopes that it would help ease the symptoms of listeroiditis. Unfortunately the symptoms still remain. In the meantime, I a least have a diesel project to work on.
My engine is direct connected via a Lovejoy l-150 coupling to an ST 7.5 gen head. So I'm running the engine at 1800 rpm instead of the rated 2200 rpm.
At no load, I set the speed to produce 61hz (as read on a kill-a-watt meter). As I start applying load, I can hear the engine picking up and working harder, but at 3000 watts load, I'm under 60 hz. At 6000 watts, I'm running at 57 hz. As I approach 7000 watts I'm down to around 55 hz. At 7000 watts the engine is starting to smoke, but nothing really heavy.
The engine has plenty of power to carry the load because I can manually re-adjust the speed back to 60 or 61 hz. The problem is that when the load drops off, the engine overspeeds and I end up making 250 volts at 65 hz.
From what I have read on George's site, it seems that the Changfa engines have better governors than the listeroids, but I would hope for much better speed regulation than what I'm seeing.
Is this normal? if not, what are my options for improving my speed regulation. I'm considering a microcontroller based system to automate the generator, and it would not be too difficult to add a stepper moter to "assist" the governor, but it really seems silly.
-------------------
mjn
Changfa 195 WVO conversion in the works