Search found 64 matches
- Mon Apr 18, 2005 4:46 am
- Forum: Tools and Construction
- Topic: 3 To 1 Phase
- Replies: 11
- Views: 12466
re: 3 To 1 Phase
Now that would be cheating, wouldn´t it? Besides, theres not much point in using an electric motor driving the 3-phase alternator, rectify, chop it up to AC again and via a transformer get the volts´n amps at suitable freq. There is a pricetag on high amp. HF switching components that makes it les...
- Sat Dec 25, 2004 5:59 pm
- Forum: Tools and Construction
- Topic: 3 To 1 Phase
- Replies: 11
- Views: 12466
Re: 3 To 1 Phase
A friend who welds al-alloys every day for a living is visiting over x-mas, maybe something useful may come out of our late night brainstorms.
At least he can add some do&dont´s when i comes to al-welding.
At least he can add some do&dont´s when i comes to al-welding.
- Tue Nov 30, 2004 12:55 pm
- Forum: Tools and Construction
- Topic: 3 To 1 Phase
- Replies: 11
- Views: 12466
Re: 3 To 1 Phase
Actually, when it comes to DC welding with car alternators the best thing to do is to deltaconfigure the windings for max current capacity and replace the rectifier with external diodes capable of handling both the current and the higher OCV. However, the question was how to get 1-phase AC (needed f...
- Thu Nov 11, 2004 3:31 am
- Forum: Tools and Construction
- Topic: 3 To 1 Phase
- Replies: 11
- Views: 12466
Re: 3 To 1 Phase
In this case the point was to get one-phase ac from a 3-phase alternator to use for welding. As long as its dc-welding theres no problem, but if ac is required (Al) one has to find a way to distribute the load over all 3 phases. This way to solve the problem adds alot of weight to the alternatorweld...
- Sat Aug 14, 2004 11:43 am
- Forum: Tools and Construction
- Topic: 3 To 1 Phase
- Replies: 11
- Views: 12466
3 To 1 Phase
I finally found some of my papers about phase conversion. Maybe someone has already written about it, but heres what i found. It's easy to get fooled by the magnetic flows i a 3-phase transformer. Actually it works just like 3 separate transformers, one for each phase. It's ok to make a 3-phase tran...
- Wed Aug 04, 2004 2:48 am
- Forum: Valved pulsejet forum
- Topic: Metals
- Replies: 9
- Views: 8847
- Wed May 19, 2004 4:08 am
- Forum: Tools and Construction
- Topic: painting pulse jet
- Replies: 9
- Views: 8574
- Wed May 19, 2004 3:49 am
- Forum: Tools and Construction
- Topic: just kidding,but i have a serious question bout anodizing
- Replies: 6
- Views: 6788
- Wed May 19, 2004 3:31 am
- Forum: Valved pulsejet forum
- Topic: fuel pump info needed
- Replies: 2
- Views: 4844
- Wed May 12, 2004 11:44 am
- Forum: Valved pulsejet forum
- Topic: My 35 kg trust pulsejet
- Replies: 1
- Views: 4138
I have found the location of the sparkplug to be critical sometimes due to variations in fuel/air mixing at different points in the engine. Now i use "sparkprobes" when testing and it makes it very easy to find the right place for the sparkplug. However, none of my probes have survived for any lengt...
- Tue May 04, 2004 6:22 am
- Forum: Tools and Construction
- Topic: Homemade TIG Welder
- Replies: 19
- Views: 63921
I'm pretty sure the answer is hidden somewhere in the forum-archives at www.diywelder.com But i haven't had the time to read it all.
- Tue May 04, 2004 6:18 am
- Forum: Valved pulsejet forum
- Topic: Pulsed Outboard Motor?
- Replies: 42
- Views: 40816
Actually not entirely fruitless. The pat. appl. number on the picture did lead to som documents in one of the searchable patent archives (cant remember the url, but i may still have it somewhere) . Unfortunately they were in some special-TIFF format requiring a viewer that for some reason didn't ins...
- Tue May 04, 2004 2:53 am
- Forum: Valved pulsejet forum
- Topic: Pulsed Outboard Motor?
- Replies: 42
- Views: 40816
- Tue May 04, 2004 2:34 am
- Forum: Tools and Construction
- Topic: Homemade TIG Welder
- Replies: 19
- Views: 63921
I´m afraid i dont have any news more than a short note about 3 to 1 phase transformers. I asked a friend who went to the same school as i did years ago and he remembered the same thing. Anyway, a deepdive into his piles of books gave nothing. There is one more person i can think of that could have ...
- Wed Apr 14, 2004 2:47 am
- Forum: Valveless pulsejet forum
- Topic: Test run with an Audience
- Replies: 2
- Views: 4675