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  1. wanders

    Revonte ONE drive system

    I've been chatting with the CEO of Revonte regarding their drive. A few notes from our conversation: Yup, they are slow to market, and seem to be unconcerned about it. It looks like a very lean, small Finnish team with a very low burn rate to me. Their focus is getting into the Euro market in...
  2. wanders

    XPD: open-source keywin e-bike lab replacement

    Thanks for the reply, Anapaza. Whether or not my XC846 is counterfeit / clone of an earlier Infineon uC, they were available widely circa 2009. And the EB812 board was supported in a (early?) version of Parameter Designer. I think they all come from Xie-Chang. And Knuckles had an extensive...
  3. wanders

    XPD: open-source keywin e-bike lab replacement

    I sincerely appreciate the effort it took to reverse engineer the protocol and address map for XPD. Kudos to the OP and all who have contributed. I have an ecrazyman / Keywin controller (12 FET, XC846 controller, EB806XC-A-8 PCB) that I'm trying to get to work with my Cutler MAC hub motor. It...
  4. wanders

    Schwinn/32 10 Build Conclusions

    So, where do you source this conveyor belt material, anyhow? wanders BTW - really nice build you got going on, here. You are making faster progress on it than I am on mine :|
  5. wanders

    New Brushless motor for airplane 60kW

    I'm really impressed with the Yuneec e430 (see here). Targeted as a light sport plane, designed to sell for under $100K. Very impressive tech. wanders
  6. wanders

    Doing the Math

    Maybe. It certainly would make the motor operation quieter. I read an interesting white paper from PMD (who makes motor controller chips and other things). They have a technique called field-oriented control that looks interesting. PMD claim that it has all the advantages of sinusoidal control...
  7. wanders

    Doing the Math

    KF, you never cease to amaze! Thanks for the extensive FEMM tutorial. I had figured out most of this stuff (FEMM excels in neither step-by-step documentation nor user-interface niceties), but it is really useful to have this vast tutorial in a single place. BTW, if the copper depicted in your...
  8. wanders

    Doing the Math

    OK, I've been working on FEMM 4.2 models for a Halbach array, and I'm having very little luck. In particular, for N40 Neo material that is 1/4" thick, with an air gap of 1/4", with a left-right-up-down magnet sequence and square magnet cross-section, I'm not seeing the field magnitude that I...
  9. wanders

    Doing the Math

    Great find! The paper is probably in here, somewhere. wanders
  10. wanders

    Doing the Math

    Just saw this thread last night for the first time. I've been working on an axial-flux motor design for quite a while. AFAIK, the best book on the subject is by Jacek Gieras et al. Here's a link to an on-line lecture of his that really is useful...
  11. wanders

    Video of "Lead Free since 2003" VEVA Talk

    Justin: Excellent historical perspective on multi-cell battery packs. Any chance you could post the presentation in PDF form? Wanders
  12. wanders

    Even Newer 4 to 24-cell Battery Management System (BMS)

    Yup, isolated supplies are the key. I gave up (magic) smoking 20 years ago. :wink: The laptop supplies (which are dirt cheap in the surplus market) are isolated. Each is about 60W (typically 16V @ 4A) and these would match up well with the HK ECO6 50W charger ($19 plus S&H). Should be able to...
  13. wanders

    Even Newer 4 to 24-cell Battery Management System (BMS)

    Hmmm, well I've rethought this statement. Now, there is no doubt that the work that Gary and Richard have done will yield a more optimal (e.g. faster charging and balancing) solution. But for off-the-shelf stuff sourced from Hobby King / Hong Kong, as well as the LVC boards from TTPacks.com, how...
  14. wanders

    Even Newer 4 to 24-cell Battery Management System (BMS)

    I've been following Gary's design evolution (like the rest of us) with interest. It seems clear to me that, at least for the short term, LiPo packs developed for R/C application deliver the most "bang per buck" for e-bike use. The convenience factor in handling these packs also is important, as...
  15. wanders

    MAC 350w (front) and Infineon 20A compatibility

    Typical for MAC (Shanghai) hub motor and so-called Infineon controller, swap yellow and green on the phase wires and on the sensor wires, leave blue connected to blue, and you should have success. I know, because I have the same setup. wanders....
  16. wanders

    Idea for simple leaning Delta Trike

    There is a Yahoo discussion group dedicated to tilting vehicles that is 7 years old. I recommend joining and reading it. I will say that I looked seriously at a tilting tadpole design a couple of years ago. There is at least one excellent design that is simple and has only one flaw that is...
  17. wanders

    Instant Start 18 fet Infineon Boards are here...

    Knuckles: Does the new "Keywin Lab" app support the older true Infineon controllers (e.g. EB812XC-A-B board)? PS - great to have you back...h
  18. wanders

    Bar end shifter and twist throttle

    Too early to panic, otherDoc. Since you are on a trike/tadpole, you presumably don't put the stress on your bars that a DF rider does. So, you could theoretically run the shift cables inside the bar (drill very near the barcon, and then as soon as possible after the twist grip) and use a...
  19. wanders

    Infineon transistor modification

    Guys, I'm missing something. If the very original linear regulator design (see first post in this thread) by Fechter worked, overkill or not, it was far and away the simplest and even cheapest solution. I'm not a circuit designer, but the question is, does it work? If so, why shouldn't I use it...
  20. wanders

    Instant Start 18 fet Infineon Boards are here...

    So, there are two version of this software at the XC website, one for the Xie-Chang EB8xxXC Infineon-based controllers, and one for the EB2xxXC proprietary-MCU-based (XCKJ8B116A) controllers. This release supports the latter, because the proprietary MCU is in this 18FET version. Will Keywin get...
  21. wanders

    New Ecrazyman Controller I think?!?

    This is the Xie-Chang EB212XC-A-1. It uses a different microcontroller from the Infineon X846 chip - it uses an as-yet-unidentified chip called XCKJ8B116A. See here for documentation in Chinese.
  22. wanders

    ecrazyman software

    I feel your pain - I'm working through getting a EB812XC-A-B (aka Keywin's 72V/45A Infineon controller) working with a Puma. It's not plug and play. If you got your Parameter Designer SW working, fine. If not, I did a mini walk-through and included some necessary files here.
  23. wanders

    DIY custom frames, home carbon-fiber method simplified

    This is from the (in)famous R.Q.Riley website, which has been selling DIY vehicle plans for years. In fact, they DO have an enclosed 3-wheeler kit or plans.
  24. wanders

    new regen whats this controller?

    This is almost certainly a version of the Xie-Chang EB215-A-x board. It's name will be plated on the lower left corner of the board. See the attached diagram.
  25. wanders

    Xie-Chang controller documents

    Lyen, what I think is, "This is great work! Thanks!" This is an excellent walk-through on how to install the Chinese language parameter designer software on a non-Chinese PC. I will follow it to install the Infineon variant of the software (hopefully it will be similar).
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