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  1. circuit

    EVSE with local API for automations? Do they exist?

    So I have multiple EVSEs at home, and I also have solar plant with 22kWh battery, and a smart home system with various automations. And I would like to automate when I charge, at what power level and which car, so I could also automate battery charging/discharging and lowering my electricity...
  2. circuit

    STSPIN devboard

    Did not find any references on the forums. Anyone tried ST's STSPIN3201 devboard? It has a cheap hardware, fully capable of sensorless startup and torque control for traction applications. I am now playing with their motor control workbench, and got the motor spinning, but just barely. It stops...
  3. circuit

    E-bike computer for lights etc

    I want to make my bike more or less road-worthy, so will add all usual lights: turn signals front and back, daylight lights front and back, brake light, low/high beam main headlight. Also horn, 12V DC-DC, charging indication, power switch, etc. All of this is bit of nasty job, lots of wiring...
  4. circuit

    *PICS* Weird winding on MXUS v1

    OK, so I took this toast "3000W" v1 motor apart. Wanted to figure out how it is wound, with intention to rewind for mid drive and with better copper fill. Basically I like these motors very much due to low cogging torque. So here it goes (pictures attached). Notice that stator has 51 teeth...
  5. circuit

    Pulley system for belt drive

    I am looking in to belt drive systems. Of course I would like it light... Looked in to Gates polychain and centertack systems, but they are quite expensive. And where does one buy the CenterTrack kit in europe? Also saw this post somewhere on the forums: Could not really find this anywhere...
  6. circuit

    Choosing middrive motor, max 200x100mm

    Hello, So I'm through with hub motors and moving to move to mid-drive. Requirements: 1. BLDC, inrunner or outrunner 2. Max power 10kW, at least 3kW long-term. 3. Water cooled 4. Dimensions: max length = 100mm, diameter 200mm. 5. Max 2500 rpm at 48 V. What are my options? So far I have only...
  7. circuit

    TranzX motor

    On Eurobike I saw this motor... Outrunner, steel helical planetary gear, oil-cooled, 50 Nm or torque. Representative said "no-no, will not sell, buy a whole bike for €€€€€". A quick search gave only one result...
  8. circuit

    My ebike and 3.4kWh 18650 battery

    So I got myself a nice frame... That was last summer, so things are very slow here. However! I finished my battery build yesterday, which is a big step forward. Incredibly I might hit the road this year (sad irony). So about the battery. I decided to stick with "industrial" and certifiable...
  9. circuit

    ultra-fast charging cells

    I am looking for cells that could accept a "normal" charge rate of at least 4C and peaks up to 10C. Has anyone seen such cells, that are available to to purchase in low quantities? I know A123 accepts 4C as "fast charge", but these are harder and harder to get, especially quality ones. Are there...
  10. circuit

    Golden motor compact FOC controller VEC200

    http://www.alibaba.com/product-detail/48V-72V-VEC200A-controller-for-3KW_60112407298.html Has anyone tried it already? It is compact enough to actually fit on ebike. And power level is just on sweet spot, for my needs anyway. No info yet on: * variable regen * PWM frequency * max eRPM * min...
  11. circuit

    iCharger's control via MODBUS

    I have an iCharger, which is great by the way. Recently I saw this document: http://www.jun-si.com/UploadFiles/iCharger_MODBUS_Protocol.pdf which is describing MODBUS protocol for reading and writing data. Now, from given tables, It looks like it is possible to run full control from PC side. I...
  12. circuit

    Balancing charger LifePO4 battery resistance measurement

    powerlab does have this feature. Also iCharger 3010 dual might.
  13. circuit

    Help on helical gear design

    I am working on a hub motor design with internal RC outrunner. It is going well, however I don't have much practice with gears. I would like to use helical gear to minimize noise. Problem is that helical gears have relatively large axial forces and simple bearing on planet gears seems to be not...
  14. circuit

    Tesla BMS

    Anyone seen it? Zero info on the internetz... As if it does not exist.
  15. circuit

    8s BMS with CAN bus?

    Was looking for smart BMS solutions around the web... And guess what. These are hard to find. Currently the only solution, that looks viable, is: http://www.lithiumbalance.com/battery-management-systems/s-bms-compact Still waiting for pricing... Also there is Tritium, manzanita, REAP systems...
  16. circuit

    OPRUN: strange DD hub motor with ZERO cogging!

    Came across this strange motor: Interesting thing is that it has absolutely no noticeable cogging. It is direct-drive, so no gears or clutch. And it is not like it has weak magnets or anything - was quite a task to get the stator out. That strange thing on one side is just an 'optional' drum...
  17. circuit

    A new miniature sine-wave 8fun Z02 controller

    It goes for $120 as a whole kit with brakes, throttle and display at greenbikekit.com. There is not much info on it. Aaand then I saw this website: http://www.accelerated-systems.com/node/42 Dimensions are almost exactly the same, specifications are very similar as well. Also 8fun is listed as...
  18. circuit

    Battery assembly kit for 18650 cells - first prototype

    >> SELL THREAD << I am looking into using 18650 cells for some time now: link 1, link 2, link 3, link 4 (please use google translate for these). Results are stunning: 18650 cells, even with air gaps between them, offer TWICE higher capacity for volume and weight, compared to A123 20Ah pouch...
  19. circuit

    Elebike android-display

    Anyone tried this? http://www.elebike.com.tw/smartcontroller Bluetooth connectrion with Android device. Shows speed, SOC, ODO, etc. Pd4TP2GTmWE
  20. circuit

    Steel-geared hub motor?

    Anyone seen those anywhere? I am planning a 2kW+ build with 12" wheels. Apparently nylon gears will not work. My desire is to find something similar to MAC motor, but with steel helical gears and oil-filled. * steel means strength and reliability * helical means silence * oil means good...
  21. circuit

    12" front suspension ideas (linear bearing?)

    So obviously 12" wheels are not the ones that are usually mounted on fast and well built bikes and so there are no suspension forks around. I was going through various ideas and had this "new" one. Or at least I think it is new, because I did some research and could not find anything on the...
  22. circuit

    Made in china. Avoid.

    Had to brake harder than usual today. Here is the outcome: Happened in middle of traffic, at around 20-30 km/h. Could have been messy, blood and body parts everywhere, etc. You get the picture. I'm fine, not a scratch. But I will send them this photo anyway (not me), as this is only one month...
  23. circuit

    Tutorial for doubling the speed of motor

    Well OK, it's not a real tutorial, you will actually need to do some thinking on your own. However it is an idea/example of how to proceed. So I have this foldable ebike with 12" wheels, 36V battery. Top speed on flat road was 22km/h, which is quite slow. So I doubled that. Here is the idea...
  24. circuit

    18650 cell test: Panasonic vs. LG

    did some cycling on these two cells... Purchased from same supplier. More info on my blog (Lithuanian), translated to English (part 1 to part 4): http://translate.google.com/translate?hl=en&sl=lt&tl=en&u=http%3A%2F%2Fe-motion.lt%2F2013%2F04%2F07%2Flicio-celiu-pasirinkimas%2F...
  25. circuit

    Lithium in forklifts

    Hello. I am wondering if Lithium is worth it to be used in industrial forklifts. These have a large lead acid battery, usually in range of 20-53 kWh. I do have a lot of practice with lithium, however none with forklifts. Can someone lighten me up on these questions? 1. What is typical traction...
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