self build generator AVR problem advice and componants please?
You have to set up a speed control of some sort. There are electronic versions out there that run off the frequency of the alternator. They are not cheap. It is surprising just how much power is required to produce your desired electrical output. I have a large diesel direct coupled to a four pole alt.with mechanical speed control also for 1500 rpm for 50Hz 240V and have also found a little issue when welding with it. If the governor is set for the load it can over rev a bit - if set to be perfect without load it struggles to get back up to 230V if welding at 120A plus. It's been easier to live with it in the end. If you are stalling out you will have to do something about a reliable speed control - check out the quality alternative energy companies that actually install RAP systems and ask about the control setups they can provide for exactly your situation. Keep looking because there are systems that will fix your problem, and give you a very useful machine! Good luck.
The alt is what RPM you will set the engine atMost 120-240 volt are 50 HRX and run at 1800or 3600 so if it's the 3600 back end your using the wrong engineUnless you use a pulley and belt to get the correct RPMMY 8K Diesel marine ONAN direct drive 3cyc runs at 1800 Rpm If your over loading the genset than no engine will workwhat is the load your pulling as 8K is 80 amps Max single 240V or 40 amp double 120V
I'm not sure what an AVR is but you need some sort of governor to compensate for the increased load. it could be mechanical or electronic. depending on the engine configuration