Egzoset Posted March 27, 2019 Share Posted March 27, 2019 Salutations DynaVap (VC) & IH-driven DiY enthousiasts!! , Recently i happened to comment various topics which i'd illustrate as follows, essentially: Now lets make an effort to stimulate the imaginations of a DynaVap-focussed audience, eventually. For starters i'd suggest starting with my conclusion linking metal susceptor mass to its elevation of temperature, while considering specific heat capacity to be practically constant over the range of application (hopefully)... If you're a "1-Hitter" who expects a single 20 mg toke from a single temporarily-stored IH-driven "Heat Charge" then perhaps you may also accept that the hard fact that DynaVap's present VapCap alone just weights too much already when compared to my ¾g 17-Holes Metal Disc, at least 5-fold using a 500+ Watts IH driver if delays are to remain compatible with the sort of "Micro-Bursting" i get access to myself, thanks to the power of fire as well. The juxtaposition of Silicon Carbide foam and fire is patented intellectual property owned by Dan Steinberg (VaporGenie's inventor), but i yet have to find references which legally forbid IH-driven scenarios based on electromagnetic power injection combining SiC foam technology in absence of fire, precisely. So, it seems to me this idea is worth a direct response to a basic question: how much does the DynaVap Circumferential Compression Diffuser Screen weight exactly? And even better yet, what's the VapCap internal metal contact-surface area actually converting temporarily-stored energy from conductive/radiative vectors to a more convenient re-balanced mix of convective, radiative and conductive factors interacting in a context of delayed heat transfers and other transitional events that i find puzzling enough to recourse to a DiY challenge (read invitation rather than ultimatum!)... Pardon me if i must sound crude but i'd investigate radical transformations centered on the helix path inside a VapCap if that needs to remain the main source of temporarily-stored energy, which implies cutting the rest of its metal handle, if not trimming a VapCap's mass down by removing wasted contact-surface somehow... Honestly i feel challenged myself all the sudden, not to mention it would cause the loss of DynaVap's most desirable feature under the circumstances: its audible clicks! But then i'd respectfully point out that a custom-designed IH driver may as well "scan" the susceptor during some "calibration phase" with the purpose to adjust IH power injection in such way to match the Heat Charge to its final cannabis Workload. It turns out DynaVap can certainly attempt to selectect Curie-effect alloys to enhance the electro-magnetic scanner process relatively to temperature - which is the point where to connect with my last (formula) picture. Briefly put it's an exceptional opportunity ignored for no fair motives. So, honestly, if i were as much an enthousiast DynaVap VapCap owner than i'm a Customized VaporGenie Micro-Bursting user then i'd suddenly feel an ugent need to verify what the weight of my CCD Screen inside. If lucky it's near to 0.75 grams and i've gained sufficient perspective to strongly insist that DV CCD Screens get evaluated in a context where Loto Labs (Evoke/Lux) AND Dr. Dabber (Switch) flatly failed in terms of Dry Herb, so far... No doubt the DV CCD Screen can be inserted pretty much the same as i do with my 17-Holes Metal Disc inside the Hybrid Core - and then lets also consider a single IH driver coil may as well manage with 2!... That's where the fun becomes obvious at last, once the trained eye knows where to look: e.g. a single cannabic bowl can undergo pulse-heating from both sides and inflict the convective heat vector a change of 90 degrees while it serves as a Release/Transport Agent, releasing noble goodies through "The Shortest Path of Lesser Transformation" effectively. You can't do that with a genuine DV VC as sold, yet in all fairness i'll admit it's not specifically designed to get IH-driven neither. Who knows, perhaps if users stare long enough they'll realize too that it's actually been done before, just not yet. Good day, have fun!! 1 Link to comment Share on other sites More sharing options...
iBMe Posted March 27, 2019 Share Posted March 27, 2019 (edited) Interesting though bud (I think ), be good to see what you come up with. Edited March 27, 2019 by iBMe 9 Link to comment Share on other sites More sharing options...
Egzoset Posted March 27, 2019 Author Share Posted March 27, 2019 (edited) Salutations iBMe, M'well, although less cryptic emoticons could suffice anyway, i'll spontaneously admit this meme-based 1-liner socialisation attempt sure reminded me of my own stylish allusions to (alleged...) NASA guys failing elsewhere - not to mention Egzoset sees no value in anonymous forum friendship since the alias was created in 2010 (imagine virtual BitCoin credentials!), etc., etc... Yet i must confess that i did enjoy watching Red Dwarf on TV, in the nineties as i vaguely recall!... Forgive it if i sound confused by such emotive display! Euh... Now that you got your minute of glory (while cyber-criminal attacks clearly affect my internet connection in the background...), please lets repeat the IH-centric invitation addressed to skilled hackers capable of joining hint dots together and apply underlying principles from my "Plan-B" LAVA "1-Hitter" strategy; e.g. i guarantee it will eventually confirm DynaVap's overweight VapCap is counter-productive in any portable IH applications! Naturally, brute force can't really impress when all which ultimately matters is the temporarily-stored "Heat Charge" after its primary energy source has been removed... In other words clean-burning butane and/or electro-magnetic IH power injection can both cause a metal core "susceptor" to reach some desired target (IH Curie-point) temperature which combines with specific heat capacity, mass and other NASA-like variables (...) to target contact-surfaces (where tiny trichomes float among relatively massive vegetal tissue) while related discrimination in pulse-heating mode proves most useful. So... As you can imagine my challenge to DUPLICATE and PEER REVIEW stands more than ever! Future motivated reader(s) should aim directly for "Plan-A" in order to acquire 1st-hand experience of truely packetized (precision "Micro-Dosing") applications. To do so obtain a sample of VG's SiC foam pellet (or an equivalent "health Stone") and cut it into 2.5 ~ 3 mm thick "pucks" while DynaVap's CCD Screen assumes its susceptor function in the middle. Curie alloys (such as PyroFoils, for example) would render DV's (click) audible feature totally pointless, primarily by implementing self-regulation within a similar neo-intelligent SPACE-AGE alloy itself , then by "scanning" magnetic properties to allow cycle-stealing as a function of some desired inferior temperature. In any case never forget this (safety-limiting) ceiling temperature only sets a maximum energy-storage level for an Hybrid LAVA Core, complex recursive transformations including delays shall occur before convective/radiative heat vectors even flood the bowl, with near-ZERO time to thermalize... The thing about temperature is that it only reflects a past physical event; it's energy which needs to be controlled in my pulse-mode consumption method, with no room for slow/steady "Hot Dry Air Ovenizing" emulations (à la Volcano/Arizer) while my LAVA proposal is based on dynamic transitional behaviour instead. Which of course is possible simply because heat always travels at finite speed, especially in matter. NASA or not... Too bad words are meaningless in absence of relevant background nonetheless. If still curious about Egzoset's funny world merely attempt to find 4 ~ 5 years old posts calling for 3rd-party (NoFlame and similar) IH drivers as one might come to realize the same past obstructors are still responsible for today's multiple FC-reported SJK relay contact failures, despite long-forgotten (flooded) mass restriction warnings exactly... A word of caution though: proceed before it's finally erased in support of similar memes. Good day, have fun!! Edited November 10, 2020 by lildaveham Link removed Link to comment Share on other sites More sharing options...
Hippie on hill Posted March 27, 2019 Share Posted March 27, 2019 Don't be disheartened m8 Love reading your posts here and the other forums you used to post on A Vapcap heated by induction is quite efficient already in comparison to other vapes on the market. I have a 2 IHs a bag of vapcaps and bunch of other vapes so I can tell you I get more hits per watt of stored battery power with my Pipes IH and a Vapcap than I do with any other battery powered vape I've tried or own (somewhere in the region of twice as much). Of coarse, it'd be nice to get more out of the batteries or have a more pocket friendly portable unit tho 2 Link to comment Share on other sites More sharing options...
Egzoset Posted March 27, 2019 Author Share Posted March 27, 2019 (edited) Salutations Hippie on Hill, On 27/03/2019 at 6:28 PM, Hippie on hill said: A Vapcap heated by induction is quite efficient already in comparison to other vapes on the market. In principle it's certainly more compatible with rich affordable broad-spectrum aroma/taste experience when compared to expensive/complex/fragile thermostatic (frozen-in-time) extraction methods, though "Micro-Bursting" performed as i'm used to will actually require optimized (e.g. minimal) "attack" & "decay" delays plus a dense/potent yet brief "Energy Burst" or "Heat Bubble"... Using the very same cust. VG contraption i routinely wander between rather ordinary tokes vs enhanced ones (in manual fall-back "Plan-B" mode), hence DynaVap's IH users could easily remove such variance by adjusting their IH-driven Heat Charge to its WorkLoad, while i roughly evaluate ~4/5 of it presently gets wasted for some obscure purposes other than flash-vaporization. On 27/03/2019 at 6:28 PM, Hippie on hill said: ...it'd be nice to get more out of the batteries or have a more pocket friendly portable unit... It's difficult to make statements without numbers but i feel my Hybrid Core solution (with a 0.75 gram susceptor) can multiply this performance many times while offering a safer setup where no dense power source under extreme stress ever gets close to a person's face, or even double that using a Near-Symetrical DynaVapsule with analog output control... The 17-holes Metal Disc could as well be replaced by DynaVap's CCD Screen, perhaps even maintaining its clicking feature - yet in all fairness i still got to wonder. On 27/03/2019 at 6:28 PM, Hippie on hill said: Don't be disheartened m8 ... Love reading your posts here... Allright then, i'll try to keep that in mind! At the moment Dan Steinberg aka VaporGenie remained completely silent despite my repeated pledges in favour of IH integration to his legal patents , so it's still a "niche" free for the taking essentially - just not the "Bi-Energy" part though. Perhaps expert people with a trained eye can identify similitudes and develop their own genuine alternative based on past observation gained via a Prototyping Platform as mine, and/or future novel DiY IH experiments inspired by it. Nonetheless i urge eventual interested readers to take over as i reached the limits of my own personal expertise while the present sluggish context feels extremely demotivating - plus i have no hope for butane-free IH Inlet Water support anytime soon. Imagine how a rationalized (portable) energy budget starting with early blueprints might perform knowing that brute force already works despite an obvious lack of sufficient IH driver adaptation! No more burned relays! ... In addition please take note that the amount of stored energy expressed in joules can be evaluated when mass, temperature differential and power-injection time are known, to help guide following pioneers, etc. Good day, have fun!! Edited November 10, 2020 by lildaveham Links Link to comment Share on other sites More sharing options...
Egzoset Posted March 30, 2019 Author Share Posted March 30, 2019 (edited) Some more help with failed DynaVap imagination: Instead of a disc try a tube and carve spiral trenches on the external side. Fresh Air would enter from the outer right, get heated via a spiral path leading to the CCD Screen (optionally) before it enters the SiC puck from its far left side, hence recycling part of an energy which would be lost otherwise... Behaviour can be expected to feel similar to a thermal catapult where the Heat Charge needs to build up relatively slowly, just before it's used almost instantly to avoid thermalization. A radical change of strategy from that of the Volcano/Arizer... Edited November 10, 2020 by lildaveham Links 1 Link to comment Share on other sites More sharing options...
stickyblack Posted April 5, 2019 Share Posted April 5, 2019 (edited) Between the Splinter and the Dynavap these have become me daily drivers.. Been looking for something more portable than IH's for the vapcaps, other than torch. Genreally for them weekends away.. where nothing looks too inconspicuous on air travel.. Being a juice vaper.. Keep coming back to the RDA + 20-24awg wrapped.. Any idea's? Edited April 5, 2019 by stickyblack Link to comment Share on other sites More sharing options...
Egzoset Posted April 6, 2019 Author Share Posted April 6, 2019 (edited) Salutations StickyBlack, 21 hours ago, stickyblack said: Between the Splinter and the Dynavap... If it were my choice to make, ultimately i'd favour DynaVap as they've demonstrated rare dynamism by embracing IH-driving exactly, while so many other competitors still wait 'n watch. It turns out Induction Heat has real advantages which were strangely defeated in the Loto Labs Evoke/Lux and even the newer Dr. Dabber Switch, though that later product appears to implement a proper IH-driver, specifically, yet its delivery method for Dry Herb clearly falls quite below initial expectations set by a stratospheric price-tag. Apparently both types of manufacturer are trying to enhance customer experience with convection heat, too bad the RBT Splinter leaves an impression of conduction-mode e-Cig on steroïds despite its Dry Herb convection claims. IMO this translates as a waste of energy in both cases nonetheless. DynaVap's equivalent susceptor even worsens the situation because it's overweight (so far...), while i initially feared the deal with a Splinter would possibly reside in progressive contamination of its e-Liquid tank (from direct repeated potential over-heating exposure in conduction mode). But this perception is only based on its external looks though its supposed to be for Dry Herbs, right?... 21 hours ago, stickyblack said: Been looking for something more portable than IH's for the vapcaps, other than torch. Butane torches and electromagnetic IH-drivers already represent high-performance forms of portable (high-density) energy, the problem is about designs still requiring major corrective measures such as rationalized energy management performed early at the blueprint stage, for starters... The one thing i appreciate about e-Cig scenarios is the Loto Labs demonstration of a 1-Battery IH-driver with most of its User Interface externally transfered to an iPhone or tablet, to gain more portability with very little compromises on advanced session features. Many months ago i suggested temporary heat storage to fix its vaporist elements, then the same about Dr- Dabber: to implement a thermal slingshot where "Heat Charge" buildup rate can remain slow and yet support "flash" or "pulse" heating/vaporization (or release)... E. G. an energy "bubble" accumulates inside some Hybrid Core directly juxtaposed to a bowl, then it moves into it nearly instantly only to leave almost as fast a few hundred milliseconds later, thanks to "The Shortest Path of Lesser Transformation". Now about being stealthy enough to cross international borders safely, i'd point out that glass and ceramics as Silicon Carbide Foam may prove less suspicious during an X-ray inspection, while the simple presence of any high-density source of energy on airplanes would seem seriously objectionable at best... Think of consumption methods other than on-board inhalation if you must, with an eventual energy-spending phase performed previously, as in heat "activated" concentrates perhaps. Too bad right now dispersal of energy for no useful purpose as promoted by DynaVap's fanbase of followers actually blocks progress towards more suitable solutions with no exposed burning-hot surfaces. Anyway expect little improvements in portable vaporism surviving the extreme stealthy requirements of an airport environment as suggested, or maybe consider getting rich selling your findings to "stoner"/"droÿé" terrorists!... Good day, have fun!! Edited April 6, 2019 by Egzoset Link to comment Share on other sites More sharing options...
Egzoset Posted June 29, 2019 Author Share Posted June 29, 2019 (edited) Salutations, Considering today i seem unable/unwilling to re-read myself just to get re-immersed into my initial context i'll simply proceed with an update in diaporama, using pictures that could have been published in this other related thread: But 1st i'll attempt to illustrate my core objective which is to seek "The Shortest Path of Lesser Transformation" (with a twist, or two...): Trichomes! It's Nature's gift at an unbeatable price, if/when local laws don't prohibit "bio" self-cultivation at home (...): imagine, a most convenient delivery package where noble substances get collected at the site of genesis on a molecular basis! Who can pretend to offer better filtration for an equivalent cost?!! Now, who's willing to trash it all by shuffling their precious nuggets into some mystery box where it all gets cooked and even the associated vegetal substrate with it!? For the sole purpose of promoting a "CHEAT" effect... Of course those like myself who grind it can argue that the frosty layer falls into vegetal debris only to disapear, or worst, to blend with it much as paint on a wall. But the thing is, even as an ex-smoker i don't happen to consume 60 % R. H. cannabis anymore; instead i prefer mine to get crispy-dry as that's what appears to work best with my present consumption method: One twist being that i've replaced the SiC "ceramic filter" of those VaporGenie pipes with an Hybrid Core which changed the whole set of dynamics, on top of paving the way for a "Bi-Energy" transition. Please welcome my LAVACapsule in its preliminary prototype form: Euh, oups! Sorry, that was almost 3 years ago! Lets see how it finally eveolved, as illustrated right down below: In its assembled form the LAVACapsule provides a massive shell intended to protect skin, tissues and perhaps even delicate surface finish, synthetics, etc., thanks to pulse mode performed in the relative absence of thermalization. So, in a "Plan-B" situation i'll just torch my Flame-Catcher (alu. top) to inject a Heat Charge as usual, then vape my cannabic bowl through the lower top then acting as a particles filter and heat remover, basically... Golden honey will gradually condense inside such Hybrid Core turned into a cold filter, that's why i want the capsule to be reversible, in order to "reclaim" while simultaneously performing some degree of maintenance. As for IH-driven "Plan-A" setups i must point out my present prototyping samples of a Bowl Ring still miss Outlet ("fumet") Collector holes around its central circumference, one other emerging concern being their magnetic behaviour and mass: The twist here is that i cut the thinner Bowl Ring out of a genuine/refurbished VG Classic (wood handle) bowl and this metal alloy won't stick to magnets while my thicker alternative can serve as a Flux Concentrator on top of being significantly more massive than a pair of 17-Holes Metal Discs meant to energize the Hybrid Cores of a Near-Symetrical LAVACapsule, e.g. from deep inside... Yet another twist proves to be fall-back compatibility with Classic wood/alu. and Bronze Sherlock handles, genuine or fully-customized. For example using my "universal" full-length Aluminium Top captured next: Take note of the short brass version which actually gives some hint of an early conceptual mistake: If we look above its index (finger) resting site (which is internally connected to the Monobloc's annular PinHole channel...) then my auxiliary port accessing such dual-path PinHole system should become visually obvious. A top's Screw-Base side can support some permanent PH feature and still conserve suitable manual control, it appears split dual-path PinHole systems can prove forgiving in terms of leaks! Even better, that permanent half can be readily converted into an auxiliary PH path separated from the main one by a metal mesh layer of brass that's wrapped around my core's Top-of-Bowl SiC Puck, which implies fresh air is allowed to enter cores using up to 2 independant paths: 1 from a top's index (finger) resting site + 1 from a fully-customized handle also featured with manual (thumb) control... A major issue with that brass top though is when it's supposed to compose a LAVACapsule as this would result in the direct connection by close confinement of an Outlet with 2 Inlets and that's definitely not a proper way to initiate further experimentation IMO. By chance an alternative/full-compatible scenario exists where the Screw-Base side PH port gets replaced by nothing else than a straight double cut. So in the end my "universal" Screw-Base system only involves a pair of slots cut at a 90 degrees angle relative to my internal PH path, with a Top-of-Bowl Wrap Brass Screen in between which actually boosts their relative independance. Briefly put a Screw-Base Annular Mating Disc *MUST* always remain intact because it's all there is to ensure air-tight sealing at the junction points. Genuine Classic wood handles will work with my "universal" top in semi-permanent PH mode, where it's still possible to block the main PinHole path using my other (right-hand) thumb; if customized to offer manual control then a wood handle could use some confinement system as illustrated in my 4-20 "Minion" version. Too bad wood handles ain't much fun to clean and reclaim from, as those are really economic. M'well, permutations can go on like this for a long while and that's an integral part of the fun there is to share, because the multiplication of handles and tops makes it much more probable the chosen layout shall fit a situation best. In addition swapping tops around to finish a bowl comes to mind spontaneously, etc., etc. Last but not least i'll conclude my present post with the "Copper O-Ring" item required by Full-Metal tops & handles: There's one installed in my full-length Aluminium Top too, ideally its purpose is to seal my internal PinHole path around a Bowl or Monobloc because the cavities ain't no exact match (as there's some tolerance margin involved if the pieces are to insert at all): be warned lots of mechanical pressure was required to assemble these parts together... Ah, and while i think of it here's my improvised crafting tool that proved absolutely necessary for proper removal of Bowls from their metal Classic/Bronze Sherlock handles: It's needed in order to clear the ground for convenient customization, e.g. for installation of a Copper O-Ring after some long drill bit created a PH path meant to link a Bowl's Annular PH channel to my thumb resting site, while once screwed-in a Top's Mating counterpart shall bridge that connection so i can gain manual control of a top's Hybrid Core from that handle. There again aluminium works best and the cracked wood captured here should serve as an evocative reminder. ... High in my to-do list one of many more remaining challenges would be the problem of converting a planar IH coil (inside some 3rd-party ready-made cooking plate) into one capable of sending energy in pulse mode directly into my LAVACapsule's susceptor elements, hoping to get them sufficiently hot long before the ferro-magnetic Bowl Ring turns into a heat source itself! In other words there's plenty of provisions for even more fun in the future when ready to engage into "Plan-A" IH-driven experiments. My hope being it won't require many more years before i can eventually enjoy Power Precision Micro-Bursting combined to Butane-free Inlet Water!... Then purists shall ask for an integral 100 % glass path i figure. Good day, have fun!! Edited June 29, 2019 by Egzoset Link to comment Share on other sites More sharing options...
Egzoset Posted August 6, 2019 Author Share Posted August 6, 2019 (edited) Salutations, Here's some supplement of information about my March 30th post: The on-line calculator of a manufacturer offering ready-made IH-drivers suggests SiC Foam would be most suitable for practically any pro-cannabic application one may think of, including dabbing. Although it doesn't have SiC Foam as an option one can still input the same dimensions as those of the puck in VG pipes (13.66 mm dia. x 7.76 mm) to get a rough idea of what's possible, for example if we select "Heating the full load" using a "Multi Turn OD" coil it's OKay to expect only 5 seconds shall be required for a solid SiC object to reach 750 °C in a "Susceptor Heating" scenario where 1.7 KW of power output is available... So, being a porous foam it would be reasonable to assume similar performance from commercial IH cooktops IMO. Now imagine a pen-size delivery whip where the SiC puck only needs to get dim-red! But there's a problem: A flat "plannar" coild as this one (taken out of a 1.3 KW unit) is likely to require some reshaping in order to better suit the pellet format, yet i don't think it impossible considering the IH cooktop needs to be powered up for just a few seconds in pulse mode rituals as mine. This won't resolve another problem related to Inlet Water but it sure inspires hopes for all those condemned to satisfy with "Hot Dry Air Ovenizers", not to mention that SiC alone is a ceramic nearly as purist as glass can get... Good day, have fun!! Edited August 6, 2019 by Egzoset Link to comment Share on other sites More sharing options...
Egzoset Posted August 6, 2019 Author Share Posted August 6, 2019 (edited) P.S.: Hummm... Lets admit i was never tempted to even attempt to measure the electrical resistance of VG's (DuoCell) SiC Foam and now that i did it just leaves me more puzzled than before, yet i read that there are SiC dopants as aluminum nitride and yttrium oxide which apparently provide control of such parameter, so perhaps if it can be made somewhat conductive then i suppose the idea of turning it into a susceptor could make sense after all. Though i'm still less than confident the SiC Foam pellets at my disposal would work as suggested, while i'm not too sure neither i'd want to try doped SiC anyway... Go figure! Edited August 6, 2019 by Egzoset 1 Link to comment Share on other sites More sharing options...
Egzoset Posted January 21, 2020 Author Share Posted January 21, 2020 (edited) Salutations, Consecutively to the following posts and possibly a few others where the DynaVap VapCap got mentioned: This reminds me of an illustration i published on December 1st, 2010 (...), about an hypothetical merge between the Volcano and a Vaponic/VapBong. Available in my album on Google Photos. Too bad i can't display it here, two thirds of my local vaporist collection vanished already and it was part of it. Anyway, pardon me the lack of suggestive imaging, it boils down to a simple comparison between some helix setup temporarily accumulating energy and my Hybrid Core: series vs parallel, respectively. In one case we get an elongated heat bubble equivalent to a chain of shorter air pockets so tightly coupled one to each other it's just simplifying as a single spiral, while in the second case the airflow sets in motion small air pockets (through Silicon Carbide Foam) which emerge more like a collective wave front. So, the Vaponic/DynaVap helix trades-off its potential punch effect to buy time, which possibly gives an edge in terms of "Activation" i suppose; an elongated Energy Buble would result in deeper heat penetration combined to more thermal exposure. Personally i've chosen an opposite strategy which is to favour the briefest Heat Pulse duration possible as an attempt to exploit energy's absolute inability to thermalize, diffuse and disperse instantly... Doing so simplifies materials selection a great deal, minimizes denaturation/baking and even widens the cannabinoïds spectrum if i'm correct to believe this actually targets the surface contact (selectively) and also relies on energy depletion to spare what's left behind until the next inhalation. One major difference then between my serial vs parallel analogies becomes evident: wasted power needs serious management in one case and not the other, because my Hybrid Core purges its residual energy nearly as fast as it had a Heat Charge injected, if not faster... Ultimately less wasted heat is good news and most specially for a PORTABLE application. Perhaps a DynaVap can explore brief/dense Pulse Mode too but only by using an over-size IH-driver in order to make injection extra-brief, which ain't gonna fit the average shirt pocket IMO. Good day, have fun!! Edited November 10, 2020 by lildaveham Link removal Link to comment Share on other sites More sharing options...
Egzoset Posted July 2, 2020 Author Share Posted July 2, 2020 (edited) Salutations, The matter of semi-DiY IH-driver design kept me busy reading various documentation related to popular "ZVS" (Zero Voltage Switching) solutions recently, with attention mainly focussed on catastrophic failure modes, trade-offs and more exactly possible corrective measures as those below. For example Bob Nash published an "Improved ZVS Driver" based on Maxim's Max4429 chip: His circuit inserts dedicated gate drivers (+ control logic) into a self-sustained (oscillator) loop and even provides a convenient opto-isolated override input. The next strategy appears to promise compactness, it's from Francisco Piernas Dıaz who posted a "Fast ZVS Mazzilli Driver" based on the Texas Instruments TPS2814: Piernas's schematic closes the self-resonating loop in a more "integrated" fashion while an override line option doesn't seem to be excluded. So it was nice to think lightweight, now let see what going heavy should look like! Please appreciate a contribution by Oleg Kutkov on Infineon's IR2110 Gate Driver: It's for a "Powerful DC motor driver", which explains why there's no LC tuning this time: hence it must be frequency-agile or at least with resistive loads, and i suppose perhaps even the ones as reactive as windings in a stepper motor, etc. My final 3 selections are from Dany K., it's about "Induction heating" (I/II/III) and relies on the Infineon Technologies IR2153: Induction heating I. Induction heating II. Induction heating III. with IGBT Such omnipresence of "snubber RC" components may suggest the other scenarios could benefit from that simple stabilization technique as well. IMO the next step in IH-driving must involve similar protections/accomodations to invite further experiments with delivery tools other than just the DV VC alone. ... Good day, have fun!! Edited November 10, 2020 by lildaveham Offsite links and pics Link to comment Share on other sites More sharing options...
Egzoset Posted July 19, 2020 Author Share Posted July 19, 2020 (edited) Salutations, Over 2 weeks passed while i kept searching the web for any additional Mazzilli-related information (N. B.: those popular modules got inspired by a decade-old contribution from the same-name author...), and i'm ready to bet little if any benefits are for him - or eventually his survivors, go figure! ... ..although this never-ending frenzy happens to practically obscure everything else, for example: On 19/07/2020 at 4:15 PM, Egzoset said: ...in r/AskElectronics didn't obtain any better echo, quite on the contrary... So, considering that sort of odd behaviour my urge to "close" a control loop could only double instantly in comparison to that for a Mazzilli topology - m'well if 2 X 0 ain't equal to ZERO that is. Similar over-simplification ain't acceptable neither, at least not to Egzoset, which naturally implies there's got to be a more suitable alternative. The schematic below got amputated simply to illustrate what's missing (so far) that resides in a "mystery box" connecting its IH-driven "Tank" or "Work-Coil" to some PLL circuit carefully selected, i hope: Actually here's even a 2nd variation on this same theme, except that one shows a power stage with its nasty hidden "parasitic" components, hence my interest for RF Noise performance (reasoning energy losses radiated through mean transistors most probably translates as bad news...): Now please keep in mind none of the "By-Pass"/"Decoupling" tricks evoked before these 2 samples have reflected significantly in typical Mazzilli modules, as far as i can tell judging from deceiving pictures. In any case i've seen enough to have decided it's about time for me to blow some of the accumulated dust, starting with the simple idea that maybe a clever ("Plan-B") approach of my own also got the potential to help rationalize it all while more eventual features shall remain unaccessible to Mazzilli fanboys forever: On 20/01/2020 at 11:41 AM, Egzoset said: stick to a separated phases model instead: During the Pre-Heating (#1) stage it's important to avoid leaking Think hard. Does a ~12.6 Volts battery pack really need to heat DV VCs right from the start, e.g. proceeding directly with "Phase #2"?? So? Need to think harder?... How about considering the virtues of a higher voltage feeding the power stage, with gavanic i/o isolation to break at least part of the possible parasitic loop(s)... These days power conversion can easily reach 85 %, so why not begin with a "Phase #1" during which this relatively low voltage can be doubled, if not trippled, hence removing electrical stresses associated to elevated currents! In retrospective i'm sure the average IH-driven DV VC user happens to waste battery energy in vain once in a while (...), because long delays just pave the way to operator errors. What if it pays more dividends to start by wasting 15 % of a pack's charge to recover from it a bit later, in Phase-2 exactly... But this time less heavy currents will circulate around (outside the resonant tank itself) and perhaps the heat-up period may diminish as a bonus, making the whole contraption more reliable. At least this type of segmented sequencial procedure would allow batteries to use *ALL* the time these require to charge some modest "HV" storage capacitor, near 48 Volts i guess or even below. That ain't no big deal for standard circuit boards, in reward the future hypothetical users employing such strategy can always expect a uniformized "Energy Injection" cycle of invariable quality, independant of battery state until no extended "initialization" delays can compensate anymore. ... Oh well, this intuition about a 15 % step-up conversion loss might be wrong. Who cares anyway?... Good day, have fun!! Edited November 10, 2020 by lildaveham Offsite pics Link to comment Share on other sites More sharing options...
Egzoset Posted August 18, 2020 Author Share Posted August 18, 2020 Still about AC Decoupling... If this intuition could be shown to work then that could lead to some mini-revolution in the portable IH-driven Mazzilli-based world as it may translate into a weight reduction near 80 ~ 100 g or so, i bet, which is about removing the mass of 1 single toroïd ferrite core (e.g. without its copper "choke" inductor wound around since the 2nd coil simply gets transfered to the remaining unit)... Good day, have fun!! Link to comment Share on other sites More sharing options...
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