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Post by Marathonman on Aug 30, 2019 22:29:45 GMT -6
Cornboy; Free forum are limited. when we grow a little more and things straighten out for me i will extend this beyond what we have now. for now 1 Mb limit. also no banner adds end the 9th of next month. so again when i can this will be taken care of also as i HATE ADDS. Youtube marketing shoving add up ones back side and down ones throat literally make me steaming mad. is not all people fed up of some sick greedy corporation trying to sell their garbage everywhere you turn to.
MM
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Post by Marathonman on Aug 31, 2019 14:04:29 GMT -6
If forum members and viewers have not seen my videos on my PART G INDUCTOR CONTROLLER first test run at low speed then high speed here are the videos.
vid one is at low speed, second vid is at high speed.
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Post by cornboy on Sept 1, 2019 18:01:09 GMT -6
Hi All, just some photo's of my part GR magnetic resistance winding.
It has 75 turns of 2.07 mm, which will be 5 turns per contact.
Just a small tip, if you use plastic housed noncrystalline cores for this, remove the outside covers and cut a small window in them, reassemble and fill with a slow set epoxy, that way you can clamp the core tightly to achieve a tight wind, with 2mm i used a small rubber mallet to tighten the corners and make the wire behave.
Regards Cornboy.
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Post by Marathonman on Sept 1, 2019 19:40:38 GMT -6
have no clue as to what you just said except that last part about using a mallet. 10 awg square wire was a royal pain so i know what you mean about that. so i take it you will have taps off of part G ..yes. build looks very tight, very nice tolerances. just so people know mono or nano crystalline core are a personal choice and are not mandatory in the Figuera device. a regular laminated silicon iron core will do just the same. Great, not to far from an actual test run. MM
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peter
New Member
Posts: 24
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Post by peter on Sept 10, 2019 1:40:17 GMT -6
AAhh finally found you guys again. still busy winding my coils. got 3 pairs ready. will post some pics later. good to see your progress MM
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Post by creasysee on Sept 10, 2019 7:50:29 GMT -6
I'm starting to build a switch. I use a getinax board. The first few contacts are checked, they look good, but the internal holes should be slightly smaller. The template for holes and taps: Taps are chopped and straightened. Holes are drilled by the template. Internal holes 2.5 mm, external 3 mm. The diameter of the disk is 120 mm EDIT: 140mm, 120mm it's a diameter of outer holes circle, 105mm it's a diameter of inner holes circle.
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Post by Admin on Sept 10, 2019 12:42:24 GMT -6
Looks to be an interesting build Creasysee.
welcome Peter to the forum. Marathonman
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Post by creasysee on Sept 11, 2019 13:52:13 GMT -6
Hey Marathonman, I need to plan how to build primaries and I would like to know your opinion about the core area of primaries.
The area of my part G is 29,76 cm2 (4.61 inch2). I think the total area of primaries should be the same. So 29.76/7 = 4.25 cm2 (0.66 inch2)
Do you agree?
Also, I would like to know what wire size need to use for primaries. The part G has 4 mm2 wire (AWG 11). What wire should be used for primaries? 4/7 = 0.57 mm2 (AWG 21) looks small... What size wire can you advise?
Thanks, creasysee
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Post by Marathonman on Sept 12, 2019 8:52:38 GMT -6
You have to realize Part G has to be able to handle the inductances of all the primaries being reduced plus the secondary feed back. i am having a hard time trying to calculate the size of your primaries. can you please tell me the dimensions of your primary cores as in height, width and length.
concerning your wire, Yes, that 21 awg is way to small. i personally would use between 14 awg and 18 awg wire. remember you can sub divide the wire in groups to lower the current and voltage required to attain a good magnetic field. the whole point is to have the least amount of resistance as possible while still meeting you magnetic pressure requirements.
your building it backwards, your suppose to figure how much power you need or are shooting for. say say want 4 kilowatts, you then need to figure out how many secondaries it will take to output that much which can be subdivided to as many you want. lets say you decided on 8 secondaries, each secondary is accountable for 500 watts of power and they need to be able to handle it without saturation. you then take 500 watts and divide that between your primaries that will be shifted back and fourth so each primary is accountable for 250 watts. the 4 kilowatt equal 59.2 lbs per square inch "psi" of pressure total being shifted back and fourth at 14.8 lbs psi per kilowatt. divide that by 8 secondaries = 7.4 lbs psi per secondary divided between two primaries is 3.7 lbs psi per primary. each primary is accountable for 3.7 lbs psi or 250 watts. each primary must be able to peak at 4.92 lbs psi to account for the reduced primary pressure that is added to the rising primary side during forward biasing. so each primary needs to output right at 5 lbs psi of repelling peak pressure remembering that the primaries need to be twice as long as the secondaries. it must be able to produce this pressure at the length of your secondary.
part G then must be calculated on the inductances of each half of the primary sets which will be set N or S remembering that paralleling insuctances lowers the overall inductance and series increases the overall inductances. what this means is even if the primaries have a larger amount of core material per primary it is the over all inductances from series and paralleling plus the secondary feed back is what matters to part G. i am not that good at calculating raw materials so working with material with that handle a known amount of flux can be taken down to watts per lb or watts per inch then calculate from that. trying to calculate raw material takes an amazing amount of math prowess in which i lack so working with know materials help. often manufacturers can help in providing spects on materials. these post should really be moved to general discussion to as the thread will get cluttered up real fast making it a long and time consuming journey for people seeking information. which reminds me i need to post this information on the Tech Info thread, thanks for reminding me.
Marathonman
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Post by Marathonman on Sept 15, 2019 16:43:26 GMT -6
You never told me the size of your primaries Creasysee.?? wonder how Cornboy is coming along these days, i know he is busy with his farming.?? MM
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Post by creasysee on Sept 16, 2019 5:13:21 GMT -6
Hi Marathonman! I don't have primaries yet. I plan to do the core area 4.25 cm 2 (0.66 inch 2) and length aprox 10 cm (4 inch). I am busy with my farming too! Hi all Under construction
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Post by Marathonman on Sept 16, 2019 9:56:47 GMT -6
Very nice looking commutator and base Creasysee, beautiful tight tolerances. that base commutator material is thicker then first glance, should work very well.
i think your primaries should be larger, .66 inch squared is only .81 inch but that still doesn't give me the exact dimensions. 4 inch long is great but it seams they need to be larger circumference. secondaries are half the length at 2 inches same circumference. i personally would go with 1 1/2" to 2" square cores x 7 or 8 secondaries based on the size of your part G at first glance.
just so you know your building the device backwards, it is suppose to be secondary first, primary then part G but what the heck it might turn out ok. i wished i was working on a farm as working for Corporate sucks big time.
great work,
Marathonman
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Post by cornboy on Sept 18, 2019 21:02:12 GMT -6
Hi All, just got my land line back, we had a Catostrophic bush fire burn right through my farm, and took out all the landline staunchens in the area.
managed to save all the important stuff, but lost some farm equipment, will need time to clean up and get back on track.
Will post some pics on general discussion soon.
Hey Peter, welcome, look forward to your build.
Creasysee, great start to your build, should be awesome commutator.
Keep up the great work MM.
Regards Cornboy.
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Post by Marathonman on Sept 19, 2019 0:02:41 GMT -6
OH god please tell me my Garlic supply is not burnt! really though i hope nothing to valuable is gone even though it was cheap but helped do your farming better it was valuable. glad to have you back and was wondering what happened.
Regards, MM
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Post by Marathonman on Sept 25, 2019 12:26:47 GMT -6
You are not going to believe this, my motor i use for my brush rotor is completely shot. the motor has no more then a few hrs use and the barrings are shot. i was working on my part G to reassemble it as i have the brushes finished and mounted but waiting on the slip rings to be mounted. so i decided to run the motor and to recheck the balance of the rotor and the barrings emit an loud high pitch squeal. not only that the shaft which i thought was hardened steel turned out to be soft which is now bent and useless.
can you believe that, what a beautiful motor turned out to be a royal piece of crap. so now i have to get another brush motor. that sorry BS company BEI will never get my business again.
MM
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