Oily Posted December 9, 2015 Share Posted December 9, 2015 Just found this.....http://www.alibaba.com/product-detail/Electric-Scooter-controller-Self-balance-unicycle_60401798426.html?spm=a2700.7724838.30.204.S1n2e5 30km/h with a 350w motor seems a little optimistic to me - or am I missing something ? Olly Link to comment Share on other sites More sharing options...
Jez_Fila Posted December 9, 2015 Share Posted December 9, 2015 Current ones are limited by the firmware. Might be possible... Seems a bit of a stretch though. Link to comment Share on other sites More sharing options...
Colestien Posted December 10, 2015 Share Posted December 10, 2015 I do like standardize connections. That controller looks like it would "jack into" my son's Monorover with out changing anything. I don't believe that Monorover could do 20kph no matter what controller it has. Thanks for sharing Oily. Link to comment Share on other sites More sharing options...
SlowMo Posted December 10, 2015 Share Posted December 10, 2015 Somebody should give this a try. Quite interesting. If it works then it would be a fine upgrade. Link to comment Share on other sites More sharing options...
Oily Posted December 10, 2015 Author Share Posted December 10, 2015 Gotta admit, now I'm almost running twin batteries giving me 264, I'm hovering over the buy button ! I top out at 14 km/h at the moment, and that feels really awkward as the pedals rise, so I'm cruising at about 9-10km/h which is starting to feel pedestrian ! Time to make contact on shipping...... Link to comment Share on other sites More sharing options...
SlowMo Posted December 10, 2015 Share Posted December 10, 2015 11 minutes ago, Oily said: Gotta admit, now I'm almost running twin batteries giving me 264, I'm hovering over the buy button ! I top out at 14 km/h at the moment, and that feels really awkward as the pedals rise, so I'm cruising at about 9-10km/h which is starting to feel pedestrian ! Time to make contact on shipping...... We will be watching you! Link to comment Share on other sites More sharing options...
electric_vehicle_lover Posted December 10, 2015 Share Posted December 10, 2015 Looking at the pictures, that controller board is just equal to the ones that say that work for the max of 16km/h. We are developing our own OpenSource firmware (https://github.com/generic-electric-unicycle/documentation/wiki) for that boards and then we will implement the max speed possible ;-) Link to comment Share on other sites More sharing options...
SlowMo Posted December 10, 2015 Share Posted December 10, 2015 Lily, the sales person seems to be very accommodating and talks fluent english. She wants to make sure and asked me to provide a photo of my mainboard for compatibility. Link to comment Share on other sites More sharing options...
zlymex Posted December 10, 2015 Share Posted December 10, 2015 The board looks very much similar to the photo I saved last Aug(16 months ago). which often regarded the 1st generation board. Also, the board and the motor should be matched, meaning the motor should be high speed type for high speed board. Link to comment Share on other sites More sharing options...
SlowMo Posted December 10, 2015 Share Posted December 10, 2015 Yes, I was talking to her and it seems they mixed up the product information. So apparently, there is no quick upgrade unless we also change the motor. Link to comment Share on other sites More sharing options...
electric_vehicle_lover Posted December 10, 2015 Share Posted December 10, 2015 @zlymex do you know how we can visually identify the high and low speed motors? any link with more information? thanks. Link to comment Share on other sites More sharing options...
zlymex Posted December 10, 2015 Share Posted December 10, 2015 2 minutes ago, electric_vehicle_lover said: @zlymex do you know how we can visually identify the high and low speed motors? any link with more information? thanks. It's very difficult (if not impossible) to tell the type of motors from appearance. Take MSuper2 for example, motors of HS and MS are the same size, same thickness and the same style. Only the ID numbers are different which make no sense for common users like us. Link to comment Share on other sites More sharing options...
SlowMo Posted December 10, 2015 Share Posted December 10, 2015 21 minutes ago, zlymex said: It's very difficult (if not impossible) to tell the type of motors from appearance. Take MSuper2 for example, motors of HS and MS are the same size, same thickness and the same style. Only the ID numbers are different which make no sense for common users like us. Gotway is releasing a HS version of their MCM4. Would it mean a different motherboard and a faster motor? Link to comment Share on other sites More sharing options...
zlymex Posted December 10, 2015 Share Posted December 10, 2015 12 minutes ago, SlowMo said: Gotway is releasing a HS version of their MCM4. Would it mean a different motherboard and a faster motor? Sure. For large motor, more room to stretch. Link to comment Share on other sites More sharing options...
SlowMo Posted December 10, 2015 Share Posted December 10, 2015 Maybe that is what they did with the Ninebot P. Higher speed, lower torque. Link to comment Share on other sites More sharing options...
Oily Posted December 10, 2015 Author Share Posted December 10, 2015 Well I'm now in contact with Lilly as well, and have messaged her pics of my current setup.... Link to comment Share on other sites More sharing options...
electric_vehicle_lover Posted December 10, 2015 Share Posted December 10, 2015 Try to ask her for a pair of motor + controller board, for 14 inchs, that goes up to 25 or 30kms. Also ask for the firmware file. Link to comment Share on other sites More sharing options...
Oily Posted December 10, 2015 Author Share Posted December 10, 2015 Thats pretty much what I've said. Am interested in converting to a 30km/h 14" (ideally with Bluetooth). Its getting late in China, so not sure if I'll now get a reply today. Link to comment Share on other sites More sharing options...
SlowMo Posted December 10, 2015 Share Posted December 10, 2015 Actually, it has been done here already. Check out this thread. http://forum.electricunicycle.org/topic/2035-tg-f-5-500w-motor-upgrade/ Link to comment Share on other sites More sharing options...
Oily Posted December 10, 2015 Author Share Posted December 10, 2015 Oh I know - that thread is what got me into thinking about mod'ing my 14" rather than saving for an 18" gotway..... I'm wondering if it can be done with a 350W motor though - makes it staggeringly cheap ! Link to comment Share on other sites More sharing options...
SlowMo Posted December 10, 2015 Share Posted December 10, 2015 It seems there is no 350w motor powerful enough for a speed of around 25kph and you would still need to upgrade to 500w motor. Link to comment Share on other sites More sharing options...
Oily Posted December 12, 2015 Author Share Posted December 12, 2015 Ok, well still no definitive answer from Lilly, other than that 30km/h is not achievable with a 350W motor - so it's unrealistic advertising.... She is speaking to her tech guys to see what the top speed will be, but no real surprise that it's not a cheap high speed upgrade. More news when I have it..... Link to comment Share on other sites More sharing options...
Jez_Fila Posted December 15, 2015 Share Posted December 15, 2015 They updated the description in alibaba. Seems pedal tilt is at 16k and limit at 18k. There is also a big disclaimer saying that its your responsibility to make sure that controller is compatible with your device. Link to comment Share on other sites More sharing options...
Jimicycle Posted December 15, 2015 Share Posted December 15, 2015 On 12/9/2015 at 5:37 PM, Oily said: Just found this.....http://www.alibaba.com/product-detail/Electric-Scooter-controller-Self-balance-unicycle_60401798426.html?spm=a2700.7724838.30.204.S1n2e5 30km/h with a 350w motor seems a little optimistic to me - or am I missing something ? Olly I will explain this with physics. 1 hp = 746w, means to left a 75kg weight one meter per second. The slowest speed A EU can move stably is about 3.6km/h, or 1m/s. When a EU climb a slope, the rising speed (up speed) is tan(Angle) * speed. For a 45 degree slope, the ratio is 1 to 1, i.e., moving forward a meter also rise up a meter. For a 15 degree slope, moving 1 meter would rise 0.268 meters. For easy estimate, we assume that the rider plus the EU is 75kg, the efficiency of an EU is 80%. Unlike other vehicles, a EU always needs to reserve extra power to keep us balance. Usually, it needs at least 30% reserved power. Then for one house power, a EU needs about 746/0.8/0.7 = 1332W power. At the slowest speed of 3.6km/h, or 1m/s, the power needed to climb a 15 degrees slope is tan(15)*1332 = 357W. That is, a 350W EU can barely keep moving on a 15 degrees slope. In order to move at a speed of 10 km/h on the 15 degrees slope, the motor power needed is 357W * 10 /3.6 = 991W. If we really want to push a 350W EU to 30km/h, the max angle it can keep move is arctan(350/1332*3.6/30) = 1.8 degree. That is, at 30km/h, a 350w EU can have just enough power to move on flat road, without the consideration of road and wind resistance. In practice, if we want a super EU that can climb a 20 degrees slope at speed of 15km/h, we need 1332* tan(20) * 15 /3.6 = 2020W Link to comment Share on other sites More sharing options...
Oily Posted December 15, 2015 Author Share Posted December 15, 2015 6 hours ago, Jez_Fila said: They updated the description in alibaba. Seems pedal tilt is at 16k and limit at 18k. There is also a big disclaimer saying that its your responsibility to make sure that controller is compatible with your device. No real surprise - staggered me that it might even be possible ! Sooooo - onwards with my 500W motor & 30km/h board then..... 3 hours ago, Jimicyle said: I will explain this with physics. ......... Wow - a serious explanation (although it now leaves me in a bit of doubt that even a 500W EU will comfortably do 30km/h) ? Thanks for the reply. Olly Link to comment Share on other sites More sharing options...
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