| Since adding a second steel disc to my turbine I get a low rumble sound when it is spinning a little above cut in. The rumble starts at about .75 amps and continues till just under 2 amps. 2 amps and up it is quiet. The noise seems not to be mechanical. My guess would be it is just a vibration from the coils.
When I was testing coils I remember being surprised the first time I held a shorted coil over the spinning magnets and felt it vibrate in my fingers. I can imagine the effect amplified by many coils.
Now my question, first, is that what the noise is? And second, what can be done to lessen it? Aside from raising cut in are there any tricks in how the alternator is built such as 5 phases instead of 3 that helps to lessen whatever causes the rumble? Would different gauge wire affect it? Perhaps it is that my steel discs are only bolted on at one point through the center instead of 4 or five bolts like on a brake disc machine.
Anyway, if I know the cause of it I think I can handle any mechanical changes but I need to understand what causes it. Any help would be appreciated.
Andy |
|
|
Total Views
|
|
85 Scoop users have viewed this posting.
|
|
