mwkeefer
1 MW
gameofbikes said:mwkeefer said:Hello,
I read your thread and just wanted to make you aware of something...
I have and run a BBS02 with external controller but did about 3K with internal and on a calibrated CA peak for a second or less was 25A but it quickly dropped down to about 20A continuous. I successfully ran a simple 48v 13AH All Cell pack with Zero issues on flats or massive hills like I have up my road.
So continuous needs to be around 20A rated and peak somewhere between 25A and 30A for 1-3 seconds maximum.
Hope this helps!
-Mike
What's the benefit of using an external controller? I didn't know that was possible with the bbs02.
An external 6 or 9 FET Lyen is basically an infineon clone. Advantages include:
1.) Reduces heat build up in the motor assembly (takes all activity outboard).
2.) Properly specked out controller (IRFB3077 for <= 48v pack, IRFB4110 above that) will increase efficiency of the BBS-02.
3.) Programming controller becomes simple and well documented.
4.) Adjust current limits to set your needs, i use 25A/40A right now which kicks me in the ass in 1 - 3rd gear.
Mine was initially replaced out of necessity not to enhance performance as my 48v 750w BBS02 controller shorted out in the process of folding the bike one day and I didn't want to waste a new 750w BBS02 controller on this bike.
In the end... external controller is simple, I've posted a thread here about color combinations for Bafang and all you need do is run a bundle of 5 wires for hall sensors (20-24 G) and 3 phase wires at 12G. The bottom has a nice grommet you can feed these wires through and then bring them up and behind seat tube where you mount the controller between tube and rear tire. It's a 30-45 minute operation if your good with a soldering iron.
So that's my .02, its not for some but after riding both for extended lengths of time (months each) I find the external far outperforms the stock.
Regards,
Mike