John in MA
Titanium
- Joined
- Apr 14, 2005
- Location
- MA, USA
Another Round Tuit project. Several years ago I bought an '80s vintage Yamaha EC2800 120V generator from guy. He said he had bought it from a strange old fellow who had the thing hardwired into some kind of weird house-powering charging system. As a result the frame and electrical control box had been stripped off.
It took me a long time to find the schematics, but once I did I was able to test it. Jurry rigged up some stuff and it seemed to function OK.
It's a brushless self-exciting generator. The exciter winding uses a capacitor in its little circut. The problem: I have no clue what the value of this cap is, and Yammie won't tell me. They want $50 for a replacement--fat chance. How does the capacitor's value effect the generator's output? I looked at a newer EF2600 an it was a 24mfd. A fellow I talked to said that he thought 26-28 would be good for mine. But I tested it with a 45 and it did OK. I just didn't test it under load.
Any EE types care to help me with this? I'd really like to get this thing into full operation because I could sure use a nice generator.
Schematic, although it's not really needed:
It took me a long time to find the schematics, but once I did I was able to test it. Jurry rigged up some stuff and it seemed to function OK.
It's a brushless self-exciting generator. The exciter winding uses a capacitor in its little circut. The problem: I have no clue what the value of this cap is, and Yammie won't tell me. They want $50 for a replacement--fat chance. How does the capacitor's value effect the generator's output? I looked at a newer EF2600 an it was a 24mfd. A fellow I talked to said that he thought 26-28 would be good for mine. But I tested it with a 45 and it did OK. I just didn't test it under load.
Any EE types care to help me with this? I'd really like to get this thing into full operation because I could sure use a nice generator.
Schematic, although it's not really needed: