Cyclomania
10 kW
I am thinking about inserting the cables where the old cables, from the old controller, went out of the controller kind of. But you mean a totally new rectangle-hole correct? Not where the old wires went out?
Overvolting BBS02
- Thread starter Cyclomania
- Start date
Cyclomania
10 kW
Yeah mine is bigger. So I will have to have that one on the outside. It is a KT controller of 30amp. So I want to push more watts into the motor basically. Making it stronger. Seems like a fun project since I only have a 500 watt controller in this BBs-motor. So plan to switch it up.
Last edited:
Cyclomania
10 kW
hmm interesting. Do you guys think it is possible to up it to 52olt as well? So 52v*33amp
Remember Chalo writing something about volts not giving more heat so might not be a problem(?) But someone else also wrote that the capacitators might get fried?
The controller electronics is the limitation of the battery voltage so if you change the controller. That controller voltage will define your max voltage.
You can run some motors with only the thick phase wires connected if the controller can work in sensorless mode. Or virtual hall-sensor modulation* you could say with other words.
The protection from where the cables comes out is not the most important. Rather everything else and when all is finished you but some glue, melt glue or silicon in there so no water gets in.
You can run some motors with only the thick phase wires connected if the controller can work in sensorless mode. Or virtual hall-sensor modulation* you could say with other words.
The protection from where the cables comes out is not the most important. Rather everything else and when all is finished you but some glue, melt glue or silicon in there so no water gets in.
ScooterMan101
1 MW
I run my BBS02 with a 52 volt pack , I think I asked the seller to limit the amps to 24 it was a year ago , I think I saw 25 amps once briefly on a steep hill , road not dirt . I will be experimenting with different front chainrings . You can buy a few chainring adaptors with 104 BCD from many different places for the BBS02 and 130 BCD for larger chainrings on the BBSHD . the cheap ones from Aliexpress don't give a very good chain line , so with those you lose the lowest 2 or 3 cogs on the back . You can buy chainrings from different places that have some dish to them for both motors . I have a BBSHD on a different bike and run it on 12 lipo's ( 2 6s packs in series ) since they are the only packs that will fit on my full suspension frame with very little space in the middle of it . I prefer the BBSHD for all riding ( Flat and up steep mountains ) it is better and faster on 12s than the BBS02 on 14s . You can buy just the BBSHD motor and plug into it all the other sensors and display from your existing BBS02 , That is what I want to do in the future . From my experience with both motors you would be happier doing that . The BBS02 is a good little motor for people who live in flat areas though . I find that I don't feel like over volting either motor the BBS02 with a 48 chainring and the 52 volt battery is plenty . If you don't find trying different chainrings is good enough for you a couple of years ago I saw a thread and youtube videos from someone in Canada , one of the middle provences that overvolted a Befang mid-drive using a controller from Grin Technolgies , I looked into it more and found the price to be so much money that just buying a CYC Cyclone 3000 watt ( really 1500 watts continuous ) or the at the time CYC X1 pro , would be about the same price as putting a higher power controller on the BBSxx motor. And allot less work than over volting a Befang . At the present time I am quite happy with the BBSHD and stock controller , It powers up some very steep 5+mile long mountain roads .
Last edited:
ScooterMan101
1 MW
Where is this open source firmware ? Please make a youtube video on how to use it .
Cyclomania
10 kW
Yeah, I want to get a bbshd on another bike in the future. But this one is going to be an experiment with the bbs02. Right now I don't have money for the bbshd and I have this one bbs02 at home.
I think it will be interesting. I am also thiking about upgrading the chainrings as you talk about. Probably with some linkglide chains and stuff.
ScooterMan101
1 MW
Are you living in a more Flat part of Northern Europe , or with steep mountains?
When you do try different chainrings buy the ( Narrow/Wide ) ones. In the US they can be bought cheaply through
Aliexperess once you have a good adaptor. There are some ones with dish as well sold on the same site , made just for the Befang's . the ones that work on the BBS02 will not work on the BBSHD , a different bolt pattern . keep that in mind.
Cyclomania
10 kW
Interesting stuff. How does it work?
Cyclomania
10 kW
Lots of mountains
ScooterMan101
1 MW
Then from my own personal experience if you can't have a very high watt and amp hub motor set up,
( People who are under the many draconian EU Rules ) then a Mid-Drive system is best.
Next thing is for you to experiment with different front chainrings .
If you do get the cheap chainring adaptors from AliExpress , be sure to several chainring spacers for the BBSxx series motors
Different bolt pattern for the BBS02 from the BBSHD .
The cheap chainring adaptors were designed in such a way that when you bolt your chainring to it the bolts rub on
the Housing of the BBS02/HD making a awfull sound and scraping up the Housing . The Chainring adaptor spacers
will avoid that by spacing the adaptor out a little . However that also puts your chain line out more .
If you have the money better to get the $ 30- $ 40 Machined Chainring adaptors , I have both that is how I found out the
hard way about the cheep ones.
It is always helpful to have some adaptor/chainring spacers around just in case you need them .
Cyclomania
10 kW
Do you have a picture of how this looks? Is that an external controller you installed or how does it work? How do I access open source firmware? A picture, or even better a video, would be much appreciated.
Mongo
100 W
The (a?) version of the open source firmware & related tuning software is BBS-FW, available here, and the author of it posts about in on the forum, here.
Is there a video specifically on installing and using BBS-FW? Not that I've seen, but there is this video that goes over using loading and using alternative BBS firmware.
Going/messing with the firmware alternatives is somewhat risky (potential of bricking the controller), only works with particular revisions of the controllers (see near bottom of this page), requires Mickysoft Windows (and a technical comfort level with same), and being realistic about what this firmware can provide (more features mostly, not an "ultimate power" releaser).
There's little more untapped power potential in the BBS02 - it is what it is. and has served many owners well. I've loaded the BBS-FW firmware on two BBS02 builds (here and here), and am happy with the motor behavior.
Last edited:
Cyclomania
10 kW
I have tried hooking it up to my KT controller today but it did not work with only the phase wires, throttle and battery. When I checked my Sine wave controller it says "only suitable for motors with Hall sensors" so I guess I have to hook up those cables as well to make it work?
I thought sine wave controllers could turn the motor regardless of whether they had these hooked up or not ?
Anyway, I am trying to figure out which is yellow and green from the old bafang controller so I can cut that off and solder on that connector to my KT cables. To make it fit the hole in the Bafang motor there next to the phase wires.
In one of the pictures(to the left) you see a regular KT controller. They have green and yellow cables. While the bafang controller has white and grey. Anyone knows if green is the same as grey? Or if green is the same as white on that one?
I thought sine wave controllers could turn the motor regardless of whether they had these hooked up or not ?
Anyway, I am trying to figure out which is yellow and green from the old bafang controller so I can cut that off and solder on that connector to my KT cables. To make it fit the hole in the Bafang motor there next to the phase wires.
In one of the pictures(to the left) you see a regular KT controller. They have green and yellow cables. While the bafang controller has white and grey. Anyone knows if green is the same as grey? Or if green is the same as white on that one?
Attachments
yantra yatra
100 mW
Can amps be increased on BBS02b by fitting a BBSHD controller - will a HD controller fit the 02? The blot holes seem to line up. Considering using a Luna Ludi modded HD controller and firmware with 50a-60a capability.
Edit: apparently it can be done. The HD controller can fit the 02.
Edit: apparently it can be done. The HD controller can fit the 02.
Do you know how to get 35a firmware for the HD controller?
Last edited:
Similar threads
- Question
