https://wiki.rev0.net/index.php?action=history&feed=atom&title=HVPS 2026-06-04T04:02:16Z Revision history for this page on the wiki MediaWiki 1.39.1 https://wiki.rev0.net/index.php?title=HVPS&diff=313&oldid=prev 2015-08-07T22:21:42Z

<p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 22:21, 7 August 2015</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1">Line 1:</td> <td colspan="2" class="diff-lineno">Line 1:</td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>{{navup |previous=<del style="font-weight: bold; text-decoration: none;">Xray_Photo_Setup </del>|up=Xray |next=<del style="font-weight: bold; text-decoration: none;">HV_Probe</del>}}</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>{{navup |previous=<ins style="font-weight: bold; text-decoration: none;">HVPS </ins>|up=Xray |next=<ins style="font-weight: bold; text-decoration: none;">Xray_Tube</ins>}}</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">The power supply for </del>this project is <del style="font-weight: bold; text-decoration: none;">based around an [http://www</del>.<del style="font-weight: bold; text-decoration: none;">amazing1.com</del>/<del style="font-weight: bold; text-decoration: none;">high</del>-<del style="font-weight: bold; text-decoration: none;">voltage-power-supply</del>-and<del style="font-weight: bold; text-decoration: none;">-charger-low-cost-25kv-dc-assembled-kit-or-plans/ Information Unlimited HV25-K], which uses a [http://www</del>.<del style="font-weight: bold; text-decoration: none;">amazing1.com/products/Transformer-3000V-10mA</del>.<del style="font-weight: bold; text-decoration: none;">html neon lamp power supply]</del>, <del style="font-weight: bold; text-decoration: none;">operating at ~3kV open circuit at ~20mA (short circuit) </del>and <del style="font-weight: bold; text-decoration: none;">25-35 kHz </del>with <del style="font-weight: bold; text-decoration: none;">a 10</del>-<del style="font-weight: bold; text-decoration: none;">stage Cockcroft-Walton voltage multiplier </del>to <del style="font-weight: bold; text-decoration: none;">produce a 25kV DC output (nominally). I have modified </del>the <del style="font-weight: bold; text-decoration: none;">supply </del>to <del style="font-weight: bold; text-decoration: none;">use the extra diodes and capacitors included in </del>the <del style="font-weight: bold; text-decoration: none;">kit (12-stage total), giving a total output of approximately 30kV open circuit</del>.</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">In order to measure the very high voltages used in </ins>this project<ins style="font-weight: bold; text-decoration: none;">, I had to build a custom voltage probe. The schematic </ins>is <ins style="font-weight: bold; text-decoration: none;">simple, two 500Mohm 20kV rated resistors in series, with a 0-50uA DC panel meter to ground</ins>. <ins style="font-weight: bold; text-decoration: none;">According to ohm&#039;s law, 0-50kV</ins>/<ins style="font-weight: bold; text-decoration: none;">1Gohm = 0</ins>-<ins style="font-weight: bold; text-decoration: none;">50uA. Thus, the 0</ins>-<ins style="font-weight: bold; text-decoration: none;">50uA panel meter now reads in kV, </ins>and <ins style="font-weight: bold; text-decoration: none;">was relabeled as such</ins>. <ins style="font-weight: bold; text-decoration: none;">The two resistors were put inside an acrylic 0</ins>.<ins style="font-weight: bold; text-decoration: none;">5&quot; diameter tube</ins>, <ins style="font-weight: bold; text-decoration: none;">which was capped with hot glue </ins>and <ins style="font-weight: bold; text-decoration: none;">filled with mineral oil to prevent flashovers. The entire tube was then wrapped </ins>with <ins style="font-weight: bold; text-decoration: none;">heat</ins>-<ins style="font-weight: bold; text-decoration: none;">shrink tubing </ins>to <ins style="font-weight: bold; text-decoration: none;">reduce </ins>the <ins style="font-weight: bold; text-decoration: none;">chance of damage </ins>to the <ins style="font-weight: bold; text-decoration: none;">fragile acrylic tube</ins>.</div></td></tr> <!-- diff cache key mediawiki-mw_:diff::1.12:old-305:rev-313 --> </table>

WikiSysop https://wiki.rev0.net/index.php?title=HVPS&diff=305&oldid=prev 2015-08-07T00:46:37Z

<p>Created page with &quot;{{navup |previous=Xray_Photo_Setup |up=Xray |next=HV_Probe}} The power supply for this project is based around an [http://www.amazing1.com/high-voltage-power-supply-and-charg...&quot;</p> <p><b>New page</b></p><div>{{navup |previous=Xray_Photo_Setup |up=Xray |next=HV_Probe}}<br /> <br /> The power supply for this project is based around an [http://www.amazing1.com/high-voltage-power-supply-and-charger-low-cost-25kv-dc-assembled-kit-or-plans/ Information Unlimited HV25-K], which uses a [http://www.amazing1.com/products/Transformer-3000V-10mA.html neon lamp power supply], operating at ~3kV open circuit at ~20mA (short circuit) and 25-35 kHz with a 10-stage Cockcroft-Walton voltage multiplier to produce a 25kV DC output (nominally). I have modified the supply to use the extra diodes and capacitors included in the kit (12-stage total), giving a total output of approximately 30kV open circuit.</div>

WikiSysop