... I did some calculations, and 4 turns on the primary seem about right with 3.5 on the secondary. The OCV will float high when the inductor reaches DCM. At...
Created the board are with WinQCad. Autorouting is pretty good, had very few issues. Although it could be a ground plane, the datasheet says it could be...
I just found this group, joined, and read through all of the posts. This is something that I also have been interested in for a while. I built a simple plasma...
... What did the schematic look like? Was there an inductor/rectifier/capacitor involved, or just straight off the line with a resistor in series? The project...
I'm interested in those schematics, as well as any photos you have of it working, assembly, etc. Thanks Dave Saltspring ... From: ohpc@yahoogroups.com...
I'll see if I can figure out how to upload the docs I have so others can see them. I am interested in the inverter. I went to the US Patent website and did a...
I created a directory called "patents" and uploaded the patents to it. I also uploaded a PDF of the design for the plasma cutter I am currently using. One...
... The power factor correction (second one from the top) may be useful. It's nice to be able to copy other peoples' patents without worrying about litigation,...
... Just finished a more recent version, using the much simpler dual forward topology and tl494 controller. It's at files/schematics dual forward/dualfwd...
... dual ... circuit, ... add a ... some ... but ... VERY ... will ... Looks great. What frequency are you switching the FETs at? And, what will it take to...
... OK. Looks like about 50KHz huh? If you ran higher frequency, you could use a smaller tranformer, right? Also, a smaller L1 and C4. It looks like D3 and...
... 35-40 amps will most likely require PFC, even with a high current 240V service. ... Ooops...seems I forgot about that, easy fix. ... Shipping here to the...
... Although the frequency could be higher, transistor losses would increase, because the time in the linear operating region would increase. Gate transformer...
... 240V ... And, I presume, heavier wire in the transformer and appropriate FETs, right? Or are you designing for higher currents but running at only 20...
... Yes, I'm going to design the power components to work with 30 amps, and the controller to work with 20 amps. After testing, the controller will be...
... controller ... You're in the US? If so, your house is already wired with both legs, and you just need a circuit breaker, some 10 or 12 ga. solid wire, and...
Actually, you need to get the 10/3 wire and wire the red and black to the 2-pole circuit breaker, the white to the neutral buss bar and the green to the...
... to the ... green to ... single ... meet." ... I'm not really sure about code wiring, so I would be hesitant to do anything against my home's insurance....
Yeah, the 2-pole breakers feed from both sides (phases) to get the 240V. Technically, you have to get a permit and have it inspected. Around here, you can...
... There's no ... have .5 ... with ... I have about a 10 second post flow to cool the tip (I got that number from the data sheet for a commercial unit). If...
I created the boardart for the main PWM controller, mainly to demostrate how simple the controller is. The GDT is not included, because they should be as close...
I looked through the links you posted, and I think I'll try to build an H bridge design with power factor correction. I really want more amps that you will...
... I just got an email from her (the PSU manager). She said there were several issues, and she wants to discuss it further with me when I get back from...
... Oops. Most of what I learned about SMPS came from app notes and online sources, which might explain a few mistakes. Would love to here about the problems,...
... The extra circuitry can be similar. The original idea of an H bridge was abandoned because of the extra components and complexity of ZVS, both of which...
... Have you used the Harbor Freight unit? I haven't, but my experience with many of their products has convinced me that their claims may not always be...
YAHOO! groups strip attachments, so you all should be safe from this threat but, If you use YAHOO! an email account, there is a new virus (worm) going around,...
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