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Ballpark figures
Hello Everyone.
I've ventured into the world of SSG and have constructed a 'ferris wheel' style energiser from a 16" bicycle wheel this has 10 x 2" ferrite magnets attached to it.
The Coil has 135 feet of 7x 20guage and 1 x 23guage. all pretty much as per the current 'basic manual'
Anyway, the basic circuit works, it has been (slowly) charging an 'old' sla 10Ah battery.
I'm able to adjust the trigger voltage through a potentiometer and have had the circuit working, drawing 250ma for over 2 days.
I'm using new 7ah sla batteries as the primary and an old 10ah sla as the charging battery. I'm just playing around with things at the moment to figure out what works best you understand, I realise that the 10ah battery cannot be trusted and I have no 'bedini conditioned' batteries - yet.
so, some questions
How do you determine the appropriate speed/trigger voltage/current draw? the reason I was using 250ma was that the 7ah batteries have a c20 rating of 350ma but I realise that maybe the slow charging I was seeing was due to this being too low or not optimum, and I couldn't find an answer.
what might ballpark figures be for this? I think rpm is difficult to quantify because a lot of these implementations have wheels of differing sizes and therefore different rpm's
maybe mpm (magnets per minute) might be more meaningful?
another possible reason for the slow charging is that the transistors are NOT matched. I plan to do this using multi-turn pots and an osciloscope has anyone succesfully done this?
I would be very grateful for some thoughts.
Thanks.
I've ventured into the world of SSG and have constructed a 'ferris wheel' style energiser from a 16" bicycle wheel this has 10 x 2" ferrite magnets attached to it.
The Coil has 135 feet of 7x 20guage and 1 x 23guage. all pretty much as per the current 'basic manual'
Anyway, the basic circuit works, it has been (slowly) charging an 'old' sla 10Ah battery.
I'm able to adjust the trigger voltage through a potentiometer and have had the circuit working, drawing 250ma for over 2 days.
I'm using new 7ah sla batteries as the primary and an old 10ah sla as the charging battery. I'm just playing around with things at the moment to figure out what works best you understand, I realise that the 10ah battery cannot be trusted and I have no 'bedini conditioned' batteries - yet.
so, some questions
How do you determine the appropriate speed/trigger voltage/current draw? the reason I was using 250ma was that the 7ah batteries have a c20 rating of 350ma but I realise that maybe the slow charging I was seeing was due to this being too low or not optimum, and I couldn't find an answer.
what might ballpark figures be for this? I think rpm is difficult to quantify because a lot of these implementations have wheels of differing sizes and therefore different rpm's
maybe mpm (magnets per minute) might be more meaningful?
another possible reason for the slow charging is that the transistors are NOT matched. I plan to do this using multi-turn pots and an osciloscope has anyone succesfully done this?
I would be very grateful for some thoughts.
Thanks.
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