Tedvin

I see, thank you for the explanation, my vision gets clearer for every day passing . Yes there is definitely more to it than one initially thinks. Unfortunately I simply don't have room for a bigger controller than S06S or KU63/65 without making major modifications. I don't want my bike looking too much like a DIY-project either. However, from reading in the S-LCD3 manual I see that there is a feature for reducing the maximum current which the controller lets the motor draw. At highest setting it reduces current by 5 amps from the controllers maximum, which for the S06S would be 14-5=9A. With 36V system this makes for a power slightly above the controllers rated 250W. So my questions here are: Does this current-reducing feature of the S-LCD3 work with S06S controller? If it indeed does, this slight "overpower" shouldn't be impossible to handle over-heat wise, right? Perhaps with minor modifications like changing the thermal paste to something better (got loads of qualitative stuff of this since I'm building PC's). I've been trying out the simulator you linked, really nice tool. From the drop down menus I chose the Bafang BPM motor, 36V 14Ah eZee LiMn (the battery i use is actually a 36V 13,5 Ah Li-ion). As for the controller I chose a custom 9 A 0.1 Ohm. (As for the resistance, I have no idea, is this a reasonable approximate value?) The resulting graphs are quite interesting. It presents 30 kph with electric power alone. My interpretation is that after reaching the vertical line, the difference between red and black presents how much power I must add from physically pedaling to reach that speed, assuming the motor doesn't generate more volts than the battery outputs in that specific speed/rpm. Considering my speed without e-bike help is about 22 kph I probably usually add about 120W by pedaling. Adding this to the electric performance makes my real life speed approximately 35 kph with this setup. If these figures were to be even somewhat close to reality, I'd be more than happy with the performance. So as I see it this all comes down to the following question: Are there any major down sides of limiting the current to only 9 amps to the BPM2 motor which really could handle a lot more? (Other than the obvious that the torque gets limited by limiting the current). Does it somehow damage the motor to not let it "stretch its legs"? If there are any weird assumptions I've made or maybe something else I haven't though of, please point them out, I'm happy to learn more about this

Hello again d8veh. I'm afraid I didn't think this through enough, and I'm hoping you can help out. The main purpose of getting new equipment is to increase the speed of which I will be able to cruise with moderate pedaling. As of now my motor stops assisting at 25 kph, which means my speed is about 24-27 kph with the motor pulsing on and off when pedaling moderatly. So far an S06S along with S-LCD3 has been determined. However, I think my motor might also be a limiting factor for the speed, but want to figure out for sure. I've read that if the no-load speed differs (about 10%) with fully charged/uncharged battery then the motors rpm is limiting the top speed. I've also read that if the system doesn't "pulse" (kick in and out) when lifting the tyre and holding the gas, the motor is doing as many rpm's as it can with that voltage. On my bike the speed isn't lower when my battery level is low, it just get's less torque which suggest it could be spinning faster before reaching maximum rpm for that voltage. Although, when I lift the tyre and give full gas it doesn't pulse but rather keeps a stable 25 kph which suggest it does as many rpm's as it possibly can with that voltage. Obviously one of the facts aren't true since its contradictory. Could you help me straightening out the facts here? Do I need a different motor along with my S06S to increase the top speed? If I in fact should get a new motor, I've been looking at the BPM2 36V350W with 328 rpm. My wheel size is 28x1,75. I'm riding mostly a more or less flat surface although sometimes quite windy since its open fields and along coastline. Also I'm quite lightweight, me + bike + battery weighs in around 90 kg. Would the BPM2 36V350W work well together with the S06S although that controller is rated at 250W? Does this seem like a good option to drastically increase my speed with moderate pedaling? Sorry for long post, thank you for taking the time.

I added a PAS and have placed my order. What a project this turned into, can't keep my hands away from tinkering Cheers d8veh!

Thanks for all of your help. So right now I'm thinking of getting a S06S along with S-LCD3 from BMSBattery. My lights run off 36V so I'll just connect them to the wires coming from the battery and add a separate on/off-switch for them. Does all of this seem like a good solution?

Yes, at a closer look there is just like you say also the red and black wire. Ok, so the S06S seems to be a nice controller with the "torque imitation". However, I'm wondering how that controller will work together with my display/control panel. My present one looks like this http://store.ecoride.se/cykeltillbehor/182-kontrollenhet-activedrive.html. Will I still be able to use the same panel? Does the controller have the possibility to connect my lights aswell or do I have to come up with some other solution for the lights? And just to be clear, neither of S06S or KU65 has a speed limiter? It's tempting to buy one and try it out, as soon as I get your reply regarding the control panel

Well, it's quite tight, but the measurements of both KU 63/65 (http://www.bmsbattery.com/controller/692-hall-sensorsensorless-250watts-brushless-hub-motor-controller.html) and the S06P (http://www.bmsbattery.com/controller/545-s06-250w-imitation-torque-square-wave-controller.html) should be able to fit. As to whether my motor is sensorless or not: Does this refer to if there are hall sensors or not? On my present controller I have 3 thin wires (blue green yellow) labeled H1, H2 and H3, which run from the controller to the motor along with 3 thicker wires. Does this mean my motor is in fact sensored? I'm sorry that my knowledge in this area is a bit thin. However, thank you for taking the time and helping out d8veh, it's much appreciated

Thank you for the reply. Yep, that's the trouble. I measured my box to 95x50x30mm. It's really tiny. It also has different connectors than other more common controllers i've seen on here and endless-sphere. Do you know of any good places to look for controllers?

Interesting about the 2013 model controller. That sounds exactly like how I want it to work. I've got the Urban8 from 2014. I'm sorry about the stolen bike, though I wonder, did it's controller have the same connectors and functions? I'm thinking ecocide possibly keep spares from older models, so perhaps one of the older controllers could be bought from them. If not, maybe they could point us in the right direction towards the seller of those controllers

Hello there! I just signed up on pedelec solely för the purpose of this thread. I, just like brugospals, have än ecoride and än identical controller. This 25 kmh pulsing drives me crazy on my Daily 42 km bike ridning. I read through the thread with excitement, only to find that a solution wasnt in Place yet. I tried shorting Every suspicious connector like suggested. Unfortunately None of them gave the desired effect . Is there anything else you or someone else with more experience than me can think of? I can add that ecoride use the same controller för all their bikes regardless of wheel size, so the limit shouldnt be because of rpm. Any help apreciated, thanks in advance.