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4hv.org :: Forums :: General Science and Electronics
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cockroft walton

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uzzors2k
Sun Jun 01 2008, 11:09AM
uzzors2k Registered Member #95 Joined: Thu Feb 09 2006, 04:57PM
Location: Norway
Posts: 1308
Play with this circuit simulator, it will help you understand how the Cockroft Walton/ Greinacher multiplier works. Link2

1212318546 95 FT46076 Voltage Multiplier Simulation
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Avi
Sun Jun 01 2008, 01:07PM
Avi Registered Member #580 Joined: Mon Mar 12 2007, 03:17PM
Location: Melbourne, Australia
Posts: 410
Link2
(note, the h bridge stake can be skipped if a high current is not required, simply use the 2 sides of the inverter as input to the CW multiplier)
file, import

$ 1 5.0E-6 10.391409633455755 50 5.0 50
f 720 432 752 432 0 1.5
f 880 432 848 432 0 1.5
f 720 336 752 336 1 1.5
f 880 336 848 336 1 1.5
w 752 320 800 320 0
w 800 320 848 320 0
w 752 416 752 384 0
w 752 384 752 352 0
w 848 416 848 384 0
w 848 384 848 352 0
w 848 448 800 448 0
w 800 448 752 448 0
v 800 448 800 320 0 0 40.0 5.0 0.0 0.0 0.5
w 720 432 720 336 0
w 880 432 880 336 0
I 720 288 880 288 0 0.5
w 720 288 720 336 0
w 880 288 880 336 0
w 752 384 768 384 0
w 848 384 832 384 0
w 832 384 832 480 0
c 832 480 896 480 0 9.999999999999999E-5 -4.264106580973485
c 896 480 960 480 0 9.999999999999999E-5 -7.572945138110615
c 864 576 928 576 0 9.999999999999999E-5 -7.4400791279639495
c 928 576 992 576 0 9.999999999999999E-5 -7.074484671525516
d 864 576 896 480 0
d 896 480 928 576 0
d 928 576 960 480 0
d 960 480 992 576 0
w 768 384 768 576 0
w 768 576 832 576 0
w 832 576 864 576 0
w 992 624 992 576 0
w 864 624 864 576 0
g 800 448 800 464 0
p 832 480 832 576 0
p 992 624 864 624 0
r 864 656 992 656 0 10000.0
w 992 656 992 624 0
w 864 656 864 624 0
x 914 681 942 684 0 12 Load
165 592 224 608 224 0 0.0
R 656 192 656 160 0 0 40.0 5.0 0.0 0.0 0.5
r 560 256 560 192 0 144300.0
r 560 256 560 352 0 144300.0
w 592 352 592 320 0
w 592 352 560 352 0
w 560 256 592 256 0
w 560 192 656 192 0
c 656 384 656 416 0 1.0E-8 3.3333333333333304
g 656 416 656 432 0
c 560 352 560 416 0 1.0E-7 2.11067972673238
g 560 416 560 432 0
d 528 256 528 352 0
w 528 256 560 256 0
w 528 352 560 352 0
x 808 373 822 376 0 12 5v
o 15 64 0 34 20.0 9.765625E-5 0 -1
o 35 64 0 34 20.0 9.765625E-5 1 -1
o 36 64 0 34 20.0 9.765625E-5 2 -1

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Solidacid
Sun Jun 01 2008, 02:08PM
Solidacid Registered Member #1430 Joined: Sun Apr 06 2008, 11:12AM
Location: Ã…rhus, Denmark
Posts: 102
i got it to work cheesey .
thank you all

and uzzors, Great link wink
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Solidacid
Fri Jun 13 2008, 03:53PM
Solidacid Registered Member #1430 Joined: Sun Apr 06 2008, 11:12AM
Location: Ã…rhus, Denmark
Posts: 102
WTF? i just played around with my cockroft walton for a while and noticed something strange.
when i feed it 7,5V AC (50-60Hz) i get 25 volts witch drop drops to 20 over a few seconds.
the strange thing is, when i feed it 12V (also 50-60Hz) it gives off 20 volts from the start and stays there.

how can i get a lower/same voltage when i feed it more?

im using 50v 22uf capacitors and 1000v diodes put together like the one in the diagram at the top of the page


EDIT: i just added 2 more stages and now im getting 31 volt out with a 12v input should't it be 192 volts?

REedit: 24 volts and stil getting 31 volts. im confused dead
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