Search results

Date Relevance Most replies

  1. E

    BBS01B - pushing the limits

    Today I went for a longer ride involving some hills. I kept temperatures below 43°C (just over 20°C above ambient) which meant keeping power under 600W once it hit 40°C. The most I have put through it is just over 1200W (25A at around 48V) which it tolerates and is pretty rapid.. But you can see...
  2. E

    Odd BBS02B programming quirk

    I ran into an odd issue earlier today. Changed some basic parameters, appeared to write ok, on reading back it had changed several fields to completely different values. Culprit field was Assist 8 Current set to 17%; setting to 16% everything worked fine. Repeated over many attempts. When set to...
  3. E

    BBS01B - pushing the limits

    I have my keep current set to 100% because it feels more natural to me not to lose power when I try to put the power down but I am mindful I am therefore running higher actual current than many, even at lower PAS settings. Another reason to keep cadence up!
  4. E

    BBS01B - pushing the limits

    Thanks pomah. I am happy with my gearing (46T front, 11-34T 10-sp rear) as I am mostly flat terrain and never even need the 34T to get up anything with good cadence. I am just about to look at temperature again with increasing current but don't expect there to be an issue, probably even up to...
  5. E

    BBS01B - pushing the limits

    If the BBS01B motor gives up the ghost being used with a BBS02B controller at 48V, I likely will replace with the BBS02B system. The BBS01B in stock form has plenty of power, my main gripe is the slow cadence - topping out at 75-80rpm is just too slow IMO. Glad you are enjoying yours...
  6. E

    BBS01B - pushing the limits

    Ah! I presume you are using stock settings and haven't gone into the programming specifics? Is your temperature probe on the outside?
  7. E

    BBS01B - pushing the limits

    Excellent! What current are you running (including keep current), and what temperatures are you reaching? I had thought briefly about adding a heat sink but thought it might attract a bit too much attention. I will keep it in mind! Although fewer sprockets worked well for the lower voltage...
  8. E

    BBS01B - pushing the limits

    That makes sense. That also makes sense. I notice for my bike at 36V at a maximum speed of ~40kph (based on max gearing and battery state of charge) it is no longer possible (necessary) to sustain power output over 10A on the flat, since I only need approximately 360-400W to maintain this...
  9. E

    BBS01B - pushing the limits

    Thanks for the explanation! What I am currently unsure about is whether increasing the voltage shifts the point at which significant energy is wasted at heat (increases the minimum acceptable pedal cadence), or simply extends the top end - i.e. if supplying 250W at 36V at a pedal cadence of...
  10. E

    BBS01 Controller Upgrade 36V to 48V

    What settings are you guys running (Keep Current, speed limit)? I will be making the same conversion soon. Hoping to assess temperature and slowly go up on current depending on temperature. Currently running 36V at 9A which until I get used to it is already awesome (but wanting the top end...
  11. E

    BBS01B - pushing the limits

    What kills motors/controllers? Current or power? I have a BBS01B controller/motor package (not sure what the motor code is). The cadence is a bit slow and I will be fitting a 48V BBS02B controller/battery hopefully within a couple of weeks while using the BBS01B motor. (Yes I could upgrade the...
Back
Top