Videos on High Voltage engineering for space applications. - Page 1
Forum section: electronics / projects

author: rbola35618
author_rank: Frequent Contributor
timestamp: July 11, 2013, 03:13:13 am
content: Hi EEbloggers,These are comprehensive videos on High Voltage engineering presented by Steve Battel who is a well known designer of space rated power supplies. I hope these will be useful for people interested in doing high voltage design.Day 1http://mediaex-server.larc.nasa.gov/Academy/SilverlightPlayer/Default.aspx?peid=ccf8f8da53ad4c99bbfd74b6651922231dDay 2http://mediaex-server.larc.nasa.gov/Academy/SilverlightPlayer/Default.aspx?peid=a2bdec72cb224785a122b27b630e543e1dRobert Bolanos

author: Jebnor
author_rank: Regular Contributor
timestamp: July 12, 2013, 04:08:48 am
content: And there goes my weekend...

author: ve7xen
author_rank: Super Contributor
timestamp: July 12, 2013, 05:53:35 am
content: Bah, stupid SilverLight.Moonlight is unmaintained / defunct and I can't be arsed to try to find or build a binary. The source does not have obvious links to the actual media files.Video looks interesting, if someone can extract a link to something playable...

author: Psi
author_rank: Super Contributor
timestamp: July 12, 2013, 06:01:19 am
content: yeah, i cant be bothered installing SilverLight either.

author: Alexei.Polkhanov
author_rank: Frequent Contributor
timestamp: July 14, 2013, 06:12:51 am
content: Quote from: Psi on July 12, 2013, 06:01:19 amYou guys still using Windows XP or something?I found slides in PDF format:http://www.nasa.gov/pdf/684081main_12188C_Revised%20for%20Posting_Battel_HVEngineering_Workshop_DAY2.pdfhttp://www.nasa.gov/pdf/684078main_12188C_Revised%20for%20Posting_Battel_HVEngineering_Workshop_DAY1.pdfInteresting thing is ... Google search for "Ruitberg current-fed push-pull oscillator" returns only that PDF. It is not spelled right or that design is from MarsChunks of schematics are very unclear,but some interesting components:IRHF57234SE RADIATION HARDENED POWER MOSFET 250V, N-CHANNEL THRU-HOLE (TO-39)http://www.chipfind.ru/datasheet/pdf/irf/irhf57234se.pdf1N5811US MELF package diodehttp://www.microsemi.com/document-portal/doc_download/124792-lds-0168-1Each resistor and capacitor have model number along with value and voltage "2.2uF 50V 10% 87106-249".and so on.And why on Earth I would ever use that.

author: Alexei.Polkhanov
author_rank: Frequent Contributor
timestamp: July 14, 2013, 09:47:21 pm
content: Does anyone know why many emitters on schematics have what looks like a ferrite bead? "FB" as designator gives it away, see pic below. I mean I know what ferrite beads do but why placing them on almost all emitter pins?

author: SeanB
author_rank: Super Contributor
timestamp: July 15, 2013, 04:17:20 pm
content: Generally there to stop parasitic oscillation in the transistor. If it has a load that is somewhat inductive it can oscillate on turn on and the beads provide extra impedance to reduce this.

author: cthree
author_rank: Frequent Contributor
timestamp: July 15, 2013, 08:28:45 pm
content: SilverLight FTL

author: ve7xen
author_rank: Super Contributor
timestamp: July 16, 2013, 03:48:55 am
content: Quote from: Alexei.Polkhanov on July 14, 2013, 06:12:51 amHaven't used XP in about a decade. I'm on Linux. At one time, Microsoft sponsored the Mono project to port SilverLight as Moonlight, but that project is defunct and I can't find binaries for the old version that exists anywhere, if they'd even work on a modern distro. If someone were to use Chrome or Firefox's developer tab, you can probably see the network request for the actual video URL, which would likely play fine in a normal media player.QuoteNow these I can read. Thanks!

author: BravoV
author_rank: Super Contributor
timestamp: July 16, 2013, 03:53:56 am
content: Quote from: Alexei.Polkhanov on July 14, 2013, 09:47:21 pm

author: Smokey
author_rank: Super Contributor
timestamp: July 16, 2013, 05:53:16 am
content: I actually like the silverlight style presentation for this kind of stuff. I know you can use other formats, but seriously having the video and the slides synced like that is nice. The ability to change focus on demand is killer.Lectures like that are usually one or the other and it's harder to follow.(is that really 8 hours!!! crazy)