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#Post#: 721--------------------------------------------------
Re: NessProjects Boost Circuit
By: nessprojects Date: November 1, 2013, 7:13 pm
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@ Barbados:
D1 to D4 much depends on the power of your turbine but to be on
the safe side you would be best using a current rating that is
as good as your turbine. My 50w turbine only has 1n5407 diodes
for D1-D4 and only 220uf caps,(The higher the cap value the more
current will pass through diodes).
My advice is to use all the same type of diodes.
If you are using a silicon bridge then use silicon diodes for
the doubler.
@ Francisco:
Crazyguy is correct, Its such a simple circuit that it could
just be hard wired to a bridge (Same as lynx did).
NB:
ALWAYS MAKE SURE THAT THE BRIDGE RECTIFIER SECTION IS RATED
ABOVE THE TURBINE RATED OUTPUT.
This will ensure that should any caps blow out then the turbine
will always be loaded.
#Post#: 744--------------------------------------------------
Re: NessProjects Boost Circuit
By: francisco Date: November 3, 2013, 1:03 pm
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Thank you all !!! I just did the components assembly , and you
know What ? it works !!! ( but of course you already new that)
;D ;D ;D
regards
Francisco
#Post#: 1236--------------------------------------------------
Re: NessProjects Boost Circuit
By: pbezza Date: January 15, 2014, 5:33 am
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What needs to change in this circuit for a solar dc boost?
#Post#: 1242--------------------------------------------------
Re: NessProjects Boost Circuit
By: pbezza Date: January 15, 2014, 6:04 pm
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Okay. I have read about this cct in a few different threads and
it was mentioned that it could be used as a solar booster as
well.
#Post#: 2989--------------------------------------------------
Re: NessProjects Boost Circuit
By: lynx wind Date: May 29, 2014, 9:42 am
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Nessprojects,
I had to clear out the attachment folders some time ago because
the forum had a low limit. I have since increased the limit.
Unfortunately the circuit diagrams in this topic were deleted.
Any chance you could repost the diagram. I can draw it up as
well if you don't have it. Also I am going to try designing the
new alt for the larger Seagull to cutin at 160 rpm. Anything
below that will be low wind and will go through a boost. What
caps would you suggest for 0-20 watts into a 24 volt battery?
#Post#: 3000--------------------------------------------------
Re: NessProjects Boost Circuit
By: nessprojects Date: May 29, 2014, 5:14 pm
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@ Lynx
Unfortunately I had a computer crash and lost the original
pictures a short time ago. :'(
I would stick with the 220uf caps to start with and build your
way up, steady as you go.
@cg
Although I have not tested your circuit in real life with the
additional negative pulses, I think it could work to a advantage
by using the 220uf normal setup on the + side as normal then
maybe some smaller caps on the negative side. Maybe this will
give a better cut-in at very slow speeds ?.
only tests will tell I suppose. Many options to choose from by
adding switches and caps in parallel.
Update: I found the original circuit wizard file so I have re
posted the picture in the first post.
#Post#: 3601--------------------------------------------------
Re: NessProjects Boost Circuit
By: sut Date: July 1, 2014, 8:11 am
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Nice job @ CG easy way to change out caps
#Post#: 3688--------------------------------------------------
Re: NessProjects Boost Circuit
By: happygolucky Date: July 3, 2014, 9:29 pm
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@ness an the rest, who have contributed to the boost circuit
Kudos to all..been trying to absorb the understanding an
knowledge of what the boost circuit technology doseit is
simple, A voltage multiplier is an electrical circuit that
converts AC electrical power from a lower voltage to a higher DC
voltage, typically using a network of capacitors and diodes.an
pulse charge the battery is my understanding ... every vawt must
have a sweet spot for the rpm cut in to charge ...so rather
waste low voltage in low rpm, double an store it an prevent
stall correct? reason for circuit to boost low ac bottom ac
current of sine low voltage to double the current an load it
into cap doubling low voltage pushing it threw the positive side
of rectifier ...?till you reach cut in.. how do you determine
cut in RPM?
so your loading the caps an charging till it reaches the cut in
charge speed..i did notice that i had a little drop off without
the circuit it settled back to 12.65 matched 1-1 source to load
so the boost was pushing it up .010-.020 it would not stall as
it climbed increased 12.65, 12.75,12.85 at 10- 15 mph? under
low wind. i had constant 10-mph wind to day ran all day with
some gust to 15 pushing the boost up.. is this a deep cycle
charge or a quick surface charge? till cut in? excuse my lack of
electronic knowledge @cg i do not know everything so i will eat
some crow just for you....have seen some loss of efficiency
today.... even with good wind.. with out the boost
circuit..1000uf
the 220uf seems to be a good all around boost circuit i will try
it..how do you determine which is choice.. an what caps to
use... as you where experimenting with the 175 12v an 24 v where
you looking for the sweet spot that would work with both
voltages?must be a give an take median
HGL
#Post#: 3703--------------------------------------------------
Re: NessProjects Boost Circuit
By: happygolucky Date: July 4, 2014, 11:41 pm
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i played with the ness circuit today ...i have it going..with an
with out had good stable wind 10-15 mph but it seems to be
restricted.. booster caps maybe to big? with out the circuit i
ran a 1000 watt inverter an a single fan pulled the battery down
to 12.11 with a heavy load slowed the vawt.. i saw the real
output of PMA threw after going threw the rectifier it was all
over the place it was 9.3+ v an then 11 .0 then then 8v then
12.11..then i hooked up the circuit to see if it would charge
faster it charged but not as fast as the video did boost in the
m/a not like buck booster..an drill battery..lynx showed
again is this a surface charge or a deep cycle trickle charge? i
have it temporary wired in line an it did not recover to 12.87
of coarse wind did die down then start up again... i think
battery is at 12.54 on load side..so tomorrow i will put it on
solar or leave it on the wind an see... but your video Lynx
was showing a fast charge on small battery this is a deep cycle
battery? an i may need to equalize it... a used deep cycle
marine battery it was@ 11.5 when i got it. never been equalized
to 14.6 v ..being sealed closed battery sealed type deep cycle
my meter should shows it charging . i did see some small amp
spikes nothing above 1 amp.saw a few watts but it was charging?
i think i will build the 220uf learning..new stuff about a
simple circuit..
open for suggestions thanks cg for the response seems like
multiple factors evolved
nice board lay out CG
#Post#: 3714--------------------------------------------------
Re: NessProjects Boost Circuit
By: nessprojects Date: July 5, 2014, 3:28 pm
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@HGL
Don't believe everything a digital meter tells you when it comes
down to spikey voltage.
the purpose of this booster is to double the voltage of the
turbine so it will charge with something instead of nothing. The
current through the device is decided with the size of the 2
caps until the main rectifier takes over the bulk of the work.
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