when winding the coils i was looking for a 220rpm cut in. testing each coil one at a time ac i was getting 2.5 per coil. so six coils were 15 ac. so that looked ok to me. but now with the stator finished and running on test bench. this is what i am getting out. rpm volts dc. 260 13.3 270 14.00 300 14.7 320 16.00 330 16.7 340 17.00. this is with three bridge rectifiers. one per phase. the dc voltage was lower so i had to close up then good working air gap i had. now every thing is a bit close .but running free and clear.
it was in my mind i will need open the gap a bit to lower the cut in speed. or the other thing was to put a bit resistance in the dc line. now i can see the cut in speed is a bit to high . but its working well just going a bit fast. this is with a motor on the bench dring the mill.
but looks like i might lose out a bit in lower winds. apart from making a new stater and putting sum extra turns on the coils.
two in hand 16awg. 52 turns per coil.(should have put 55) i suppose that few tuns just makes the difference so it looks like i am stuck now with the higher winds and wont get much from the lower ones.
i did connect it to a battery also used a 21 watt light bulb. i was very impressed with the amps out. but as it was being pushed with grid power i never took any readings. would i save anything if i used just two bridge rectifiers. apart from putting a coat of wax on the blades. is there anything else i can do to lower the cut in speed. blade is six foot dia. i thought i had it right this time. not far out. its a ill wind that dos no good
i would like to try other forms of testing .but without putting it up in the wind. what can i learn. as long as i dont need a degree . cheers bill. blueyonder. its a ill wind that dos no good[ Parent ]
.....Bill [ Parent ]
but now with sum fore sight it would be good to copy down sum numbers and then i can always compare at a later date. what would be best to test a load on the gen. i did blow a 21 watt light bulb. but that was mega rpm. evan the ac bench motor was struggling . so is a battery ok or better with a resister . one thing i did notice was a sweet and gentile hum as it made power. that was sweet music to my ears.
i am better off playing with engines at least i can understand how well its running and starting. but that's off topic . it might be best if i put results in a diary entry. cheers again .John. its a ill wind that dos no good[ Parent ]
You blow a light bulb due to over voltage not over current because it is the voltage across the light bulb that determines the current through it (assuming enough is available). So, I would just put two 25 or 40 watt bulbs in series.... I.E. with one wire into one and out, then into the other and out, with the second wire on a switch or something... just not in parallel.. this way you will halve the voltage across each bulb and should be OK...
.....Bill[ Parent ]
