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    Nanjing far driver controllers

    Nanjing Far Driver controller ND72850 limits the output power to the motor at 0 RPM. I am suspecting integrating RC circuit inside built-in. Anyone has had an experience fixing this issue?
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    Small sine-wave FOC controller with linear throttle

    Did you use any documentation or just trial and error method :) ?
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    Small sine-wave FOC controller with linear throttle

    I am looking for a FOC controller, (field-oriented control), which would be lightweight and trivial to set up. Something lighter weight than Adaptto MINI-E is what I am after (mini-e which is too powerful for my needs which are: 36V, 15A-20A, linear throttle). I am looking at Accelerated...
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    Lightweight sine wave hall brushless controller for Q100H?

    Thanks motomech, One short question, after looking at the specs of C3620-NC (shown at ebikes.ca) i seems that the torque is not linear with the throttle voltage? It seems that it is sharp rise at specific voltage, which might mean that in real life the throttle is just a on/off switch and NOT an...
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    Battery assembly kit for 18650 cells - first prototype

    Ha, you last statements: lead to my initial question:
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    Lightweight sine wave hall brushless controller for Q100H?

    Is this one square or sine wave? Hows the noise, smoothness and efficiency?
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    Reduction ratio, front hub motor

    Another question I have is about RPM. Say Q100H can be bought with 201 or 260 RPM (presumably these figures given at 36V). So the larger the diameter of a wheel, the higher will be the driving speed, right? But how about the torque? Is there anything more to it than just simply lower RPM, more...
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    Reduction ratio, front hub motor

    Hi motomech, good point. However, the other day I tried solarbike.com.au electric fixie, 17kg. Absolute fun, easy to ride on flat, climb the hill like superman, hehe. Mine will be even more lightweight (around 12 kg), carbon fiber assembly 7 kg + 5 kg electric conversion (2.2 kg motor + 2 kg...
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    Lightweight sine wave hall brushless controller for Q100H?

    Could you please recommend a controller for 18-20A at 36V (10s3p Li-Ion battery pack)? I would like the power be controlled with a throttle only, no control LCDs, no torque simulations, just plain simple lever throttle. It seems that controllers on ebay are old, not sine wave, right...
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    Battery assembly kit for 18650 cells - first prototype

    Would you share more info with links? Dekui ;)
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    Battery assembly kit for 18650 cells - first prototype

    yes. I suppose standard BMS (those sold on ebay) do not have this function? Have you been able to find a BMS for this task, have you build your own custom BMS?
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    Battery assembly kit for 18650 cells - first prototype

    Labas ;) I was just wondering how would you know when one batt shorts and fuse blows off? The pack will still be operational, albeit with one less battery cell in parallel :)
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    Nickel strips with fuse pattern

    Oh G, found exactly what I need :D http://endless-sphere.com/forums/viewtopic.php?f=14&t=55870&start=50#p857130 Only if these were available for sale ...
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    Nickel strips with fuse pattern

    Anyone knows where to buy nickel strips with a pattern which would act as a fuse for every single battery? Need it for Li-Ion 18650 battery, spot welding.
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    Front hub motors - the latest and the greatest

    Hi, I was just wondering if anyone knows the latest electric motor releases, new models? Q100H seems to the lightest in 350W range, it has high torque (reduction ratio 12.6), but it is few years old already. So, I thought maybe there has been some progress in the motor technology and development?
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    Reduction ratio, front hub motor

    motomech, d8veh, Guys thanks for keeping conversation going. My plan is the following: 1. Fit 30 batteries into a bottle. Done. 2. Choose voltage and parallel config to maximize efficiency and battery longevity. I am thinking which config is better 7s4p or 10s3p? Here is what I estimate: 10s3p...
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    Overpowering 250W electric motor to 500W for 3 minutes

    All clear, thanks for the good news guys, Cheers, A.
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    Reduction ratio, front hub motor

    motomech, Thank you for the info. May I ask you why 24 V is pointless? Is it because their efficiency is low? The reason I am asking is that it wouldn't be easy for me to assemble 36V batt pack in a small water bottle. Regarding controllers, I am not there yet with my research and learning :)...
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    Overpowering 250W electric motor to 500W for 3 minutes

    Can those typical Chinese (Bafang or cute etc.) motors specified as 250W sustain 500W power for roughly 3 minutes without damage? If yes, would the damage be caused simply by overheating or anything else? I plan t use 7s4p top-notch Li-Ion battery pack which could easily output 20A in total (5A...
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    Reduction ratio, front hub motor

    True, I missed that point :) So, what do you reckon, from the range of small motors, for how long can they be pumped at 500 W before the damage occurs? I would need about 3 minutes of 24V*20A = 480W delivered for climbing two hills on my commute ;) Is that too long?
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    Reduction ratio, front hub motor

    Is that true? Hmm, I haven't looked at purchasing yet, so why the coding names are different them? Yes, I do, Internal hub at rear :)
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    10s vs 9s vs 8s vs 7s Li-ion battery configuration

    Hi Dan, No need to go far :) I only got 2 hills in my commute, each somewhat average steepness, 200 meter long or so. I drive them up myself in 3-5 minutes by pedaling. So half an hour battery juice is what I need at most because most of the time I use my own bioenergy, hehe. For a weekend rides...
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    10s vs 9s vs 8s vs 7s Li-ion battery configuration

    6s? how about the BMS adn controller for 6s? there are not very common, are they? Yes, I agree. More specifically, with 7s4p config I can push it to 5A per cell easily and still have 9.5Wh per cell capacity (266 Wh total per battery pack total capacity) at those nice 24V*20A = 480W powers. So...
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    10s vs 9s vs 8s vs 7s Li-ion battery configuration

    Could you please give a link where I can buy AN ACTUAL water bottle battery pack or the whole kit? I was not able to find it :( Those widely available Chinese water-bottle-supposed-to-be-looking-like-ridiculous-designs are no good for me, mate. I haven't chosen a motor and controller yet...
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    10s vs 9s vs 8s vs 7s Li-ion battery configuration

    Hi all, I am designing a battery pack for an electric bike. It would be "concealed" in a water bottle. The goal is to estimate what is required number of battery cells (18650) for the optimal pack? Typically, one can fit roughly 30 batteries inside the water bottle. Then 7s4p or 10s3p...
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