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  1. #81
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    Scorpion 4035 HKIII
    Kv 1190 on castle Ice HV v2
    Io 4.4 amps @ 22.5 volts
    Rm .008 ohms
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  2. #82
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    20151204_234228.thumb.jpg 20151204_234455.thumb.jpg
    Hi Everyone,
    The 4025 HKIII's original carrier with stator and copper coils weight was 170.8 grams. We are at 181.8 with 5 arms wound of LRK wind without the carrier which is 20 grams and still climbing. Should be interesting to see the final weight after trimming for final assembly. The 236.7 grams is the stock HK5020 weight with carrier stator and copper coils. What I am winding on the 4025 HKIII is 5 turns in 3 strands of 17 Ga.(1.22428 mm)


    TTYS
    Hugh
    Geändert von cohesive (7.December.2015 um 08:38 Uhr)

  3. #83
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    lrk 5 turn 1.9mm yy.jpg1.9mm 5 turn lrk yy t600.jpg

    600 class 40mmx30mm stator 12N8P 6 turns LRK YY or DD 1.91516 mm. I could have easily put one more turn on for 7 turns for more fill. But I dont want the KV too low. If I terminate in DD then the Kv should be around 2300 in YY I'd expect around 1350. Im thinking later that a 7 turn in DD might be a very good wind for 6s lipo. I can wind the other t600 which is now a 4 turn YY for 2030 Kv.
    Geändert von cohesive (12.December.2015 um 16:43 Uhr)

  4. #84
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    Photos of the T600 terminated and a load bank for a generator.
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  5. #85
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    Just wanted to share photos of the two T600 40x30's complete.

    Thank You
    Hubert
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    Geändert von cohesive (12.February.2016 um 21:09 Uhr)

  6. #86
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    Hi,

    This is free sharing

    IEEE TRANSACTIONS ON ENERGY CONVERSION,VOL.21,NO.1,MARCH 200695

    Comparison of PM Brushless Motors,Having Either All Teeth or AlternateTeethWound

    DahamanIshak,Z.Q.Zhu,SeniorMember,IEEE,and David Howe

    One of the reference papers used in Gerling's findings...

    It seems Dahamanlshak, Z.Q. Zhu and David Howe suggest through finite element predictions and real practice a few conclusive comparisons of DL and SL motor winds.

    *SL's winds have more trapazoidal BEMF that DL's.
    *SL's winds have more self and mutual inductance than DL's.
    * SL's showed less cogging torque when driven by zero cross algorithms(BLDC) than DL's which would be lower if driven in BLAC.
    *Static and output torque output is higher with SL's
    *SL's have higher torque density.

    And lastly not reported in this paper but should be noted SL's have more copper fill potential !

    The BEMF measurements taken on an oscilloscope shown in figures 8,9, and 10 played a major role in the real time confirmation of theory in this Dajaku Gerling reference. Discrete proprietary sensors in and around the stator to measure magneto motor force are not essential for a hobby test bench to confirm harmonics or line thd produced by a FSCWM. Those methods will not capture all the harmonics. Neither will most SA's mostly designed for rf frequencies above 9.5k

    Paraphrased conclusion:

    The winding factor significantly effects the BEMF waveform as well as the self and mutual inductance's while the motors exhibit low cogging because of the fractional number of slots per pole.

    This idea is further confirmed in figures 10, 11, and 12, of Gerling's

    Eddy Current Loss Minimization in Rotor Magnets of PM Machines using
    High-Efficiency 12-teeth/10-poles Winding Topology

    Really amazing to see the significant differences in stator and magnet loss between the two configurations in fig. 11 and 12 that continues even with the overall reduction in the new stator core structures in fig. 8.....

    Fig 3 may explain the 12n10p Gerling wind better for some than what has been offered thus far. I'm still trying to grasp it before an attempt with no copper to waste.

    The SL and DL stator core structures are very also prototype worthy Id think.
    Geändert von cohesive (20.February.2016 um 21:33 Uhr)

  7. #87
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    SL Scorpion HK 5020 YY 24 turns 1.23mm. Took a peep inside the factory bearings and want to test full compliment deep grove radial hybrids. Noticed these run grease which usually reduces the rpm rating. Seems like alternating teeth with flatter top is better for bldc commutation and maybe can be improved upon in efficiency and reduction of rotor and magnet loss with magnet segmenting, axial pole pairs, flux barriers, and multi stranding vs big mono wire. The beginning of a parallel slot 12 tooth stator. CL and other reputable sources report 70% fill with parallel slots. This is the beginnings of one of my prototype stators with slot and relevant dimensional numbers from Christian.

    SPS stator2.jpgSPS stator.jpg
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    Geändert von cohesive (4.March.2016 um 06:11 Uhr)

  8. #88
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    Full compliment all ceramic bearings in a 19x10x5mm are upwards of $160.00 usd a pair. Maybe I'll ask for a working sample for test......

    Without a single more manufacturing process that alone would literally double the price of this motor. Would it yield anything in efficiency if PO=torque*rpm. Suppose you happen to get consistently more rpm and triplen current insulation from their use.Then maybe it would.

    For Thd measurements would typically only look to the 50th harmonic so for 1k that would be out to 50khz, over double the highest audible. There is also still reason in my reading to use an insulated bearing. Non insulated can carry the triplen harmonic currents. If the steel shafts are not expanding from heat I see no reason you wouldn't be able to use a full ceramic. It is stronger, has less drag, and is electrically insulated.

    What led me here is a crude rta measurement taken in an acoustically unstable enviroment with the S6 Edge. You'd be impressed by the full RTA features on a phone.


    A 70 db triplen seen at 300hz fundamental a 2.7khz whistle
    smiley-face-whistle-2.gif..... this one is negligible as no elevated heat shows and ill never run with no load and very little throttle - the point at which this reading was taken. It seems through further investigation that the non insulated bearings can carry those currents and create more inefficiency. It also appears that some engineers double or enlarge the size of the neutrals to also deal as they can see 173% more current than the phase currents. All this is worth a personal test for me since I've yet to see any.

    Geändert von cohesive (29.February.2016 um 12:54 Uhr)

  9. #89
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    AAAAAAAA.jpg
    Working on the test stand this is what 30,000 rpm looks like on a non proprietary children's project optical tach.
    Geändert von cohesive (1.March.2016 um 17:51 Uhr)

  10. #90
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    Basic Stamp2 MCU Dev. board with secret3 wire optical switch and 3900 series 256 x 64 Noritake graphic VFD for tach readout. Serial hookup for smart serial lcd is is not too complicated I believe. I think 3 wires.... display serial Rx to an MCU io , ground ,and +5 volts.Just like the photo switch.
    Geändert von cohesive (2.March.2016 um 01:31 Uhr)

  11. #91
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    No more waiting for logging to upload or drill estimates. We have real time now and debug to screen. More work on a kitchen test stand...... Stamp2 can read a 250Khz pulse train so I think I could use 2 or 4 teeth and get better resolution possibly.

    Until next post

    Danke,


    Geändert von cohesive (3.March.2016 um 03:43 Uhr)

  12. #92
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    Does anyone here know what beat gold is? For me it is headphones created by Dr Dre. a famous US music producer but on another forum "beatgold" was the term used to add eddy current?????????

  13. #93
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    Guess not... LOL

    Wassup CL smooth...

    I await the exclusive consortium's photos of this 1.9mm mono wire SCDD SL wind in a dual layer then I want them to add a turn!!! The world will soon know what we do about these people and this person.

    Take care.




    Hubert
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    Geändert von cohesive (1.April.2016 um 11:50 Uhr)

  14. #94
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    Hammered skipped tooth China (Align RCM-BL700MX) can terminate as parallel 3 tooth wyes or deltas 7 Turns Avg. Diameter 1.91516 mm S.C.D.D. wind .Even though it is not new or radical it is verified.... A school of thought on encapsulation and removing heat that differs from the reptilian gurus formed using UHU . Opaque.... It is also good for making windings proprietary.

    http://www.mgchemicals.com/downloads...2tc-2parts.pdf
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    Geändert von cohesive (8.April.2016 um 15:12 Uhr)

  15. #95
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    Raw with no encapsulation or insulation. You see in photo Apprx. 452.7 grams with shaft vs stock 405 grams with insulation and encapsulation. MX-ers weigh yours. This is a minimum of 36.2495 kcmils, and 18.368 mm^2 cross sectional area. Original area is 7.6mm^2, so we have here a 133% increase in copper using the LRK's and IEEE's teams push it's all finished ...and truly believe with the wasted "cooling" space you see one more turn is likely in there if you lubricate and needle the wire. With 10 years r&d and a masters proprietary knowledge one can go ahead and achieve 152% increase in a DL on this motor and post it. It should be empirically enlightening.

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    Geändert von cohesive (9.April.2016 um 14:15 Uhr)

  16. #96
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    Standard 133% increase in Copper cross sectional area.

    More photos. Nothing radical or new just a single layer parallel wye - a rare sighting from the farm. Very simple to terminate. 2 Wye bundles I created by twisting and soldering the ends of each 3 tooth motor's phases with rohs compliant lead free silver solder, then all starts A II a, B II b,C II c, is parallel so dual strand 1.9...mm conductors to form U.V.W. . 4 conductor U.V.W. motor terminals is DD. You would simply create each 3 tooth motor's U.V.W. 2 conductor motor terminals by paralleling the start and end of each phase to one another AE II bS, bE II CS, CE II AS.... aE II BS, BE II cS, cE II aS. Then parallel those 2 conductor motor terminals from each motor U II U, V II V, and W II W. So now heavier current higher revving DD is U,V,W, motor terminals made up of 4 x 1.9...mm conductors. I really wonder should I take another piece of 1.9 and wrap it around the wye bundles and solder it in place to hold the extra triplen currents.

    Edit: Please don't be confused by photo 3. It is each wires 180 degree opposite that is paralleled with not the wire beside it in the photo.

    Why not take motor constants and verify trap BEMF and harmony in FFT next?
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    Geändert von cohesive (13.April.2016 um 23:15 Uhr)

  17. #97
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    Hi Hubert,

    your work an the documentation of it is great.

    I always try to read/translate your posts and sometimes I understand it as well.

    It's a pity that no one writes something in this Thread, because I think you have very much skills in what you do and a dialogue would be even more interesting.

    I am a user of a electronic-cigarette. The maximum you can do is "making the coils your own", and if the coils are very strange and freaky in a positive way it is called COIL-PORN.

    Hubert, your selfmade electronic Motors are a kind of bigger Coil-Porn! I like watching the Photos.


    Go on like this!




    Sorry for my bad english and the lot of "off topic".
    Grüße
    Tobi

  18. #98
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    Hi Tobi,
    Thanks! Its a crusade.... Fine if no comments maybe people smarter to just to observe. It is better than preposterous keyboarders in other places so it is good. It may be hard to have continual dialog as I have no real direction in the thread other than to research motor design information apply and confirm whenever possible and share the simple truth from test and academic research. No false claims ,no advertisement to sell friends or my motors, just test and data collection with research findings from masters and dr manuals in the field as guide to confirm any tangible application of theory. Working on 7.5k views so someone is reading here and though they do not speak much they can't all be haters.....so No worries.... I will continue to post more interesting work. And be sure If no one talk I do not take offense but instead am rather flattered and appreciative of the lack of negativity if nothing else!!!

    Thank you for your encouragement. I am the one that has the language barrier problem not you....

    Hubert
    Geändert von cohesive (13.April.2016 um 18:47 Uhr)

  19. #99
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    Here is a very very interesting thread that may help us DIY motor and prop enthusiast. http://www.rcgroups.com/forums/showthread.php?t=2337523. Dynamic propeller Balance Build.

    Hubert
    Geändert von cohesive (18.April.2016 um 00:41 Uhr)

  20. #100
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    Here is another on new magnet tech that may make rare earths obsolete. http://www.designworldonline.com/com...ength-magnets/

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