UF - User Diary


	The Daily Static UF Archives Register UF Membership Ad Free Site Postcards Community Geekfinder UFie Gear Advertise on UF Forum Rules & FAQ Username Password Create a New Account

Back to UF - User Diary Index

Hmm. That's strange.	by Longfist	2014-12-31 07:35:09
Okay, we're in CRUNCH TIME now!	by Longfist	2015-01-08 19:48:48
I just dove the web for things that do almost what	by wwill	2015-01-08 20:45:09
If it weren't for lack of a hole in the middle,	by LongFist	2015-01-09 04:59:35
2N3055s are 15A power transistors. What if we	by LongFist	2015-01-09 06:56:23
You WANT the parallel!	by ideur	2015-01-10 10:12:37
A hint:	by ideur	2015-01-11 02:49:40
Buck converter will do, switching regulator at	by wwill	2015-01-11 10:46:56
Battery overcharge isn't so much a problem.	by LongFist	2015-01-12 13:11:51
Do it too often and it solves itself (catches fire). No, the battery is actually rated higher and functions there quite well. I'm trying to wrap my head around what I *think* you guys have been trying to tell me about, but I just don't think I'm "getting it": Parallel Transistors High-Current Output High-Current Voltage Regulator 12V 15A Voltage Reg with Parallel Transistors In each of these instances there is a Voltage Regulator (that I recognize, like a 7812 for example) but the output side is somehow "supplemented" by current passing through(?) the power transistors. (?) Is that even close to right? Can't be. It should also provide a passthrough for higher voltages as well - which would interfere/cancel the effect of the 7812 at all, anyway. scratches head I know I should "get it", but something just keeps me from seeing it... I can't seem to find a buck DC-to-DC converter that will provide the proper output of 36V 22.2A - and I fully realize that the amperage is fairly hefty and stands in the way of all of this. Still, the controller that came with the motor does it just fine, ergo it must be possible. And I figure that if it's possible I should be able to duplicate it. Maybe the images linked to above (they link to my TinyPic account so should be fairly safe) can give you guys an idea, or maybe someone can explain to a bonehead like me why those transistors don't muck up the regulated voltage event though they appear to bypass it. I just don't get it... The 36V 22.2A side is the only thing remaining "in the way". Once I get that sorted the rest fairly well resolves into a fairly functional controller. Note: I'm not afraid to heat-sink anything to death. Next to a good ground, a heatsink can be considered an Amateur Radio Operator's best friend... Thanks again for ya'll's help. Don't think it will be soon forgotten!
[ Reply ]
The VR chip or Zener holds the voltage and causes	by wwill	2015-01-13 09:18:11
In re the three links. Number one looks good,	by wwill	2015-01-13 09:26:51
Working on it.	by LongFist	2015-01-14 13:08:08

[Todays Cartoon Discussion] [News Index]

Come get yer ARS (Account Registration System) Source Code here!
All images, characters, content and text are copyrighted and trademarks of J.D. Frazer except where other ownership applies. Don't do bad things, we have lawyers.
UserFriendly.Org and its operators are not liable for comments or content posted by its visitors, and will cheerfully assist the lawful authorities in hunting down script-kiddies, spammers and other net scum. And if you're really bad, we'll call your mom. (We're not kidding, we've done it before.)