| T O P I C R E V I E W |
| oliver |
Posted - 11/02/2008 : 09:34:33
Dear All.
I hope you are all well, and that you are enjoying the performance of your wind turbine.
I recently managed to complete Ben's Dyno Hub project, which I needed to do to understand how things work...... ok perhaps my one is a little different!.
But sometimes thing work half way. I wanted to build the dyno hub to be able to charge my mobile phone. I managed to get from Maplin a 12V rechargeable battery, a Power inverter DC 12V to AC 230V and like it said on Ben's manual a little box with a rectifier and fuse. All this fortunately with the patients and help from a guy that works at Maplin.
I tested the wind turbine connecting the aligators to a tester........ works perfectly.
the problem was that the battery managed to charge a little bit of energy.
from 2V to 9V, sometimes it reached 10.8V, but never reached 12V..... can you please tel me the reason?, and how come when I connect the battery to the inverter and to the phone charger, the inverter makes a "Bib Bib" sound (which means low battery).
because of the situations I must say that my wind turbine is a little bit surrounded from walls but still a decent wind, the other thing is that I decided to put the battery inside a special bag that keeps the battery away from cold.
If anyone can tell me the reason why the battery can't reach 12V, in order to charge the battery. P.S. this is the link to view my wind turbine :
http://www.youtube.com/watch?v=6stulidkS5s
Kind regards
Oliver 
oliver |
| 6 L A T E S T R E P L I E S (Newest First) |
| Del |
Posted - 13/02/2008 : 11:27:27
Hi Olly,
You can make your own voltage doubling circuit from maplin components for less than a fiver. All you need is your existing bridge rectifier set-up, two capacitors and a tiny circuit board to wire it into. VERY CHEAP and EASY.
Cheers
Del. |
| gotwind |
Posted - 13/02/2008 : 10:21:16
Oliver.
I suggest you contact this eBay seller for a voltage doubler - £8
http://tinyurl.com/2e68fe
"The Voltage Doubler Circuit kit is available from us for an extra £8 (this includes a Bridge Rectifier needed to convert to DC), this kit can be switched from NORMAL 6-12 volt output to HIGH output giving about 12-20 volts output."
Ben. |
| oliver |
Posted - 13/02/2008 : 09:59:06
Thanks guys.... I will first try to find a "Voltage Doubling", because I don't think Maplin will swap my 12V with a 6V.
Anyway thanks again
P.S. still waiting for my Amatek 30V from Canada.
Olly
oliver |
| gotwind |
Posted - 11/02/2008 : 21:50:51
Good point made Dennis.
6 volt battery charging or a voltage doubling circuit needed for 12v charging.
The SA Dynohub is a very well built, inexpensive unit to get people started, this is it's real purpose here.
Cheers.
The Futures Green - Getwind of it. |
| DENNIS A |
Posted - 11/02/2008 : 21:41:34
Hi Oliver
You can reach up to 70 volts open circuit but I believe that with the SA Dyno Hubs and a normal load 7.5 to 8 volts is the maximum output regardless of the revs. I have tested 2 units at up to 1000rpm.
Dennis |
| gotwind |
Posted - 11/02/2008 : 11:06:03
Hi Oliver.
If you want to charge a mobile phone, I would use a car phone charger - that runs from 12v, it would save on any power wastage from the inverter.
The reason for it not reaching cut in (12+ volts) is simply, it's not spinning fast enough, those high walls are not helping.
If you can't get it mounted any higher try charging a 6v battery or trim the blades diameter down by 6"
It looks like a nice wind generator though - well done.
Ben.
The Futures Green - Getwind of it. |
