February 5, 201313 yr It was just a quick test to see if it would talk to me.. http://smileys.on-my-web.com/repository/Others/others-062.gif I'll do some sensible settings if the repair goes ok Don't know if you know but you can't pull settings from a controller, you can only load settings to a controller.
February 5, 201313 yr Yep.. I knew that Is there any default 'stock' settings ? Sent from my iPhone using Tapatalk
February 5, 201313 yr OK understood O_D.....I've got the default 7/15amp 250w settings somewhere, I'll dig them out... When programming be mindful that the battery current control is not very accurate it can be +5amps over, so a 15amp setting works out at 20amps and given the multiplication factor, say, from your screen shot above (3.6) your phase could hit 72amps...which would blow the standard FETs and probably many good ones as well as the heatsinking is not that stellar... Edited February 5, 201313 yr by NRG
February 9, 201313 yr MOSFET now removed [ATTACH]5083.vB[/ATTACH] New one and 7 spares on the way.... At the cheap as chips price of £3.82 Sent from my iPhone using Tapatalk
February 10, 201313 yr Author Nice one, Dave... Let's hope you don't need the spares any time soon. I've been using mine @15a for the past week and it seems pretty good so far. It holds a comfortable 22-23mph on the flat with peddalling but seems a bit slow when it drops to 16mph up hill... How they ever came up with a 15mph speed limit is beyond me???
February 10, 201313 yr Let's hope you don't need the spares any time soon. Lol I hope that as well.. The good news is that in the event of anyone else doing the naked wires juggling trick and suffering the same accident, then I'll have a spare for them. P.S its the wires that were naked not me. Edited February 10, 201313 yr by Old_Dave
February 10, 201313 yr How they ever came up with a 15mph speed limit is beyond me??? It was decided on by people who haven't been anywhere near a normal bike, let alone an ebike
February 13, 201313 yr The mosfets arrived today... They came much quicker than I expected[ATTACH]5102.vB[/ATTACH] Sent from my iPhone using Tapatalk
March 12, 201313 yr Update.. Fitted mosfet, fitted controller on to bike and bang.. another mosfet killed it self, replaced 2nd mosfet and zilch, nothing.. dead as a Norwegian blue Ordered a new controller / swapped plugs and worked out colors for halls and phases... funny thing is that this time the best was different (maybe I hadn't found the best'ist best before it went bang) Halls & Phases B - B Y - G G - Y Now using xpd rather than Lyens software as xpd is better, lol Done a few road tests with various settings... all I can say at this stage is that 120% is interesting, if only I was about 6 stone lighter it would go like a rocket [ATTACH]5281.vB[/ATTACH] Edited March 12, 201313 yr by Old_Dave
March 12, 201313 yr My Q100 show the same no load speed at 110% and 120% - try it and see what you get.
March 12, 201313 yr I didn't note any no load difference between 100 & 110, but 120 was quite a jump, will connect the laptop and test again..... This time I'll write the results down, lol Sent from my iPhone using Tapatalk
March 12, 201313 yr You might find this info useful OD.... http://www.pedelecs.co.uk/forum/electric-bicycles/13606-overvolting-easy-sounds-3.html#post164906
March 12, 201313 yr Ooooops, my bad, armed this time with pen and paper, the no load speeds are 100% = 26 mph 110 and 120% = 33.1 Sent from my iPhone using Tapatalk
March 12, 201313 yr Author Interesting... My no load speed at 100% is 45mph so in theory it could be more like 57mph at 110%. I wonder how that'll affect my real world speed...
March 12, 201313 yr Interesting... My no load speed at 100% is 45mph so in theory it could be more like 57mph at 110%. I wonder how that'll affect my real world speed... In the real world.... Not a lot, lol There are at least 10000000 reasons why, air resistance as speed increases being the main one, a stream lined and enclosed bike ridden by a 5 stone rider with a tail wind however would see a good gain at those speeds. Sent from my iPhone using Tapatalk
March 12, 201313 yr With a decent tail wind you don't want streamlining - You wants a Kite! Speaking of which - Haven't heard from Cwah lately: Hope his brolly didn't drag him under a bus Edited March 12, 201313 yr by jackhandy
March 13, 201313 yr Author I tried 120% this morning and it cuts in like a turbo boost without load. But when I got out on it... nothing! Being mounted as a crank drive, my motor doesn't build up enough speed to activate the turbo. I'd either need to fit a smaller drive cog to the motor or pedal at 150rpm.
March 13, 201313 yr Being mounted as a crank drive, my motor doesn't build up enough speed to activate the turbo. I'd either need to fit a smaller drive cog to the motor or pedal at 150rpm. Could we see some photos?
March 23, 201313 yr It looks pretty to me! Where did you get those frame clamps? You should have done a build thread on it. Other people might want to copy it. Is it the 201 rpm motor and what size sprockets have you got on the motor and the crank? I can see what you mean about the 120%. It only gives more crank speed, not more torque, so you can't realise its advantage
March 23, 201313 yr Author Cheers Dave. For the clamps, search 'truss clamp' on ebay. I'm lucky with this frame as the downtube is 50mm. I did order the 201rpm motor but it spins way faster than that unloaded. Being new to this game I wouldn't know if that's normal or not. The chainwheel is 48t, the drive (motor) cog is 18t and the freewheel is 7spd, 11t-30t. I matched all the numbers to give me a comfortable peddal speed @30mph... not that I spend much time at 30. lol. I may do more of a post-build thread when I get a bit further with it.
March 23, 201313 yr The motor will run faster than 201 rpm because, you voltage is higher than 36v (42v off the charger), so I'd expect 42/36 x 201 rpm = 234 rpm. I used a Bafang 201 rpm for mine with 14T on the motor sprocket and 42T on the crank, which felt about the right cadence. Using average 39v, cadence would be 201 x 14/42 x 39/36 = 72 max with good power at 60. Yours is 201 x 18/48 x 39/36 = 82 max Changing the motor sprocket to a smaller one will reduce the cadence without changing the power or the gearing on the bike; however, peak power is made at about 2/3 maximum rpm, which would be about 55, which is right where you can add most to it, so looks like you got it right, but it'll out-pedal you in the lower gears.
March 23, 201313 yr Author Without load my wheel hits a topspeed of ~45mph. This would suggest a motor speed of ~380rpm if my math is right. It may also suggest that I was sent a high speed motor. Pedal speed works quite well in the real world. With a slow cadence, the motor is working hard so I change down. With a fast cadence I have enough speed to change up into a comfortable cadence. I'll normally cruise at 20-25mph pedalling at ~75ish. That's about where the motor sounds/feels at it's best. Of course, I have a 3 speed switch for cruising at slower speeds.
March 23, 201313 yr I take it the 45mph is with the high position on the three-speed switch. My calculation says that a cadence of 82 is about 27 mph, but maybe your motor isn't 201 rpm at 36v. I had a 350w Bafang CST as a normal hub-motor that span with no load at 18mph without the switch and 33mph with the switch in the high position! It didn't feel any different on the road though.
Join the conversation
You are posting as a guest. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.