Hello everybody, avid reader and prospective ebike upgrade wrangler here. I am posting to get component advice and also suggestions for sourcing components.
I would like to add a hub motor to the 135 mm QR rear end of my full-suspension mountain bike, with 10-speed cassette and disc brakes:
What I am totally, totally unclear about is how to command and conquer this motor.
First of all, I want the motor to add to my power output. I am able to produce about 200 Watt (sustained) myself, but at times simply don't want to sweat from the physical exercise.
I need to have PAS (to at least create an impression of road legal operations). I am under the impression that the more magnets I get, the better, for responsiveness. What is the best Octalink / Hollowtech II-compatible PAS hardware that money can buy?
I want a kickstart / launch control feature, possibly using a small thumb lever. Traffic lights - ready, steady - launch in highest gear! There goes the torque.
I want to get up steep hills with high(er) speed - basically flatten that incline. I could imagine that, again, a small thumb lever would help: push and the motor emits power. Release, I am on my own again. Benefit: reduce pedal bob into suspension.
The whole system should be very responsive - kick in quickly, stop as soon as possible, perhaps with configurable ramping up and down? Braking is hydraulic; I would be tempted to run without any cut-out sensors?
I don't care all that much about displays - the less the better, the stealthier.
What controller do I need to get this done, enabling also silent motor operations? I read about sine wave controllers. Then about the specific S12S controller. Then about the better(?) Kunteng controllers. And the supposedly fantastic Lishui controllers with programmability via Bluetooth. And Infineon components being the Real Deal. And I am lost.
I'd rather overspend on the controller (say, USD 100 instead of the usual USD 40 from China?), because I believe that this will make the difference between getting a nicely running system, where I can tweak battery and motor performance, versus something that only just works as it is. Ideally, I could also experiment with various means to operate the system - be it through the lever or the PAS.
I am well aware that I also need a battery, but hope that I can treat it as an isolated problem? After all, that's why I go upgrade - loose the concern about being locked into a proprietary battery system. I would hope then that the controller is able to optimally discharge the battery and protect it? Then I would get "some" decent enough 48 volt battery, rather smaller than larger for weight, with a BMS that protects the battery on charge?
The battery, and most everything non-motor, I would want to stuff into a triangle bag such as the Abus Basico ST 5200 (https://www.abus.com/eng/Mobile-Security/Bike-Safety-and-Security/Bags/Basico/Basico-ST-5200), unobtrusive, easily removable. The controller I could put into a separate saddle bag?
Puh. And if you made it down here - perhaps you know about sourcing options, too? I am aware of BMSbattery, pspower, elifebike, greenbikeit, em3ev. Any other sources for the motor(s) / controller / PAS you will have suggested?
Many, many thanks for having read so far - and many thanks in advance for any input you can provide!
I would like to add a hub motor to the 135 mm QR rear end of my full-suspension mountain bike, with 10-speed cassette and disc brakes:
- motor relatively light-weight, to limit moving mass in the rear, about 2.5 kg max; I am targeting a maximum total weight of the electrical kit of 5 kg (motor, battery, controller, sundries)
- primarily for torque and performance on steep inclines (not off-road) - total powered system weight after modification will probably be around 115 kg
- low level of noise and efficiency (I don't care about rated watts, this is limited by the weight ceiling anyway)
- all sensors built-in to make it easily to control
- robust, good freewheeling
- Q128C - 201rpm @ 36 volt (sold under various other labels?), operated at (up to) 48 volt
What I am totally, totally unclear about is how to command and conquer this motor.
First of all, I want the motor to add to my power output. I am able to produce about 200 Watt (sustained) myself, but at times simply don't want to sweat from the physical exercise.
I need to have PAS (to at least create an impression of road legal operations). I am under the impression that the more magnets I get, the better, for responsiveness. What is the best Octalink / Hollowtech II-compatible PAS hardware that money can buy?
I want a kickstart / launch control feature, possibly using a small thumb lever. Traffic lights - ready, steady - launch in highest gear! There goes the torque.
I want to get up steep hills with high(er) speed - basically flatten that incline. I could imagine that, again, a small thumb lever would help: push and the motor emits power. Release, I am on my own again. Benefit: reduce pedal bob into suspension.
The whole system should be very responsive - kick in quickly, stop as soon as possible, perhaps with configurable ramping up and down? Braking is hydraulic; I would be tempted to run without any cut-out sensors?
I don't care all that much about displays - the less the better, the stealthier.
What controller do I need to get this done, enabling also silent motor operations? I read about sine wave controllers. Then about the specific S12S controller. Then about the better(?) Kunteng controllers. And the supposedly fantastic Lishui controllers with programmability via Bluetooth. And Infineon components being the Real Deal. And I am lost.
I'd rather overspend on the controller (say, USD 100 instead of the usual USD 40 from China?), because I believe that this will make the difference between getting a nicely running system, where I can tweak battery and motor performance, versus something that only just works as it is. Ideally, I could also experiment with various means to operate the system - be it through the lever or the PAS.
I am well aware that I also need a battery, but hope that I can treat it as an isolated problem? After all, that's why I go upgrade - loose the concern about being locked into a proprietary battery system. I would hope then that the controller is able to optimally discharge the battery and protect it? Then I would get "some" decent enough 48 volt battery, rather smaller than larger for weight, with a BMS that protects the battery on charge?
The battery, and most everything non-motor, I would want to stuff into a triangle bag such as the Abus Basico ST 5200 (https://www.abus.com/eng/Mobile-Security/Bike-Safety-and-Security/Bags/Basico/Basico-ST-5200), unobtrusive, easily removable. The controller I could put into a separate saddle bag?
Puh. And if you made it down here - perhaps you know about sourcing options, too? I am aware of BMSbattery, pspower, elifebike, greenbikeit, em3ev. Any other sources for the motor(s) / controller / PAS you will have suggested?
Many, many thanks for having read so far - and many thanks in advance for any input you can provide!