Recent content by MalcolmG

I'm not sure on the exact model of the motor, it may be stamped on it but I'll need to have a good look. I'm not worried about it overheating, I don't tend to use a lot of assistance, the controller has a scale of 1-5 and I usually have it on 1 or 2. Probably the worst case would be going up a...

Hi Pajtaz I bought this kit: https://www.aliexpress.com/item/32841242481.html (500W, 48V option) and combined it with a 48V 10Ah LiFePO4 battery that I found second-hand locally. The motor was already built into a wheel, the wheel is OK but a bit narrower than the original bakfiets one. I also...

I'm not sure I'd agree with this. Electric braking may be inherently anti-lock but that is because it's just not generally as good. With a front-loader cargo bike you'll often have more weight on the front wheel, especially when braking due to longitudinal weight transfer. With a decent disk...

Well I've been using it quite a bit now and pretty happy with everything. I don't have many photos but I'll attach the few I have got. Main thoughts so far: - The 500W motor has more than enough power. The controller has 5 settings and I mostly use it on 1 or 2 unless I don't feel like doing any...

I'll post a bit more detail of what I've done later, but I'm nearly finished with the conversion. I got a 500W 48V Bafang geared hub motor; unfortunately all my trials have been pretty brief as the 2nd hand battery I purchased isn't behaving very well at the moment.

That's a good point, I definitely like the idea of regen so I've broadened my search to include DD motors. Unfortunately the shengyi motor appears to be rear drive only, and all of the front hub motors they have are smaller geared ones. Given my requirements are relatively low speeds but high...

Thanks for the link, unfortunately that kit is for a trike and mine is a 2 wheeler; also I'm hoping to put the motor into the front wheel rather than the rear. I did read some of that thread you linked, far more ambitious than what I'm up to! Good on him though, looks like fun.

My forks are steel and as they currently have roller brakes I think the torque loading is probably much greater than what the motor will generate (admitted in the opposite direction). There is already a mounting location for a torque arm for the brake so I suspect I can probably fabricate...

That's a bit part of why I was hoping to avoid a DD (plus the better torque vs weight from a geared motor). It would be nice to have less noise and regen braking though. I figure that if I start with the battery size I can make from existing parts then I can always make it larger later...

Yeah you're probably right, I should have a look at some of the hills that I currently struggle with and try to get some approx gradient values for them and run them through the simulator to get an idea of how well the different motors will perform.

Thanks for the link, some useful info in there. I guess my expectation (which may be wrong), is that because I'm doing OK with pedal power, the amount of assistance I need for what I'm doing isn't that much - hence looking at smaller motors (for the reasons you outlined in your thread around...

I'm not sure if what you're saying is true regarding the effect of motor winding type on torque and speed. A quick check through the Grin tech motor simulator shows that the higher speed windings have a lower torque at stall but continue to provide useful torque up to a higher speed. My main...

The basic reason for getting from different places was simply that I like the look of the G311 motor from Grin, but their international shipping rates are pretty steep (about $200US to get a kit from them to NZ), whereas the EM3ev rates are much better. I will look more closely at the MAC motors...

Hi all, We've had a Bakfiets long cargo bike for a few years now, and use it for carting some kids around (1 and 3) and the odd bit of grocery shopping. My wife and I are fairly fit and manage well without any e-assistance, but I think we'd use the bike more if it were electric. In a 5km radius...