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  1. Laerson

    Votol EM-100 & EM-150 controllers

    Well, for this price you can't really complain, can you? :wink:
  2. Laerson

    Votol EM-100 & EM-150 controllers

    I connected a variable power supply to my EM150 and simulated an almost empty 11S battery at 33V (11S * 3,0V), it works fine. Also tested the ''speed limit'' setting at 50%. At full throttle the RPM declines when I decrease the voltage. So when you plug in your battery half charged, you get 50%...
  3. Laerson

    Votol EM-100 & EM-150 controllers

    Hi all, Lovely thread you've got going here, it's been really helpful so far! Unfortunately I can't say the same for the VOTOL manual :roll: I recently started testing an EM100 to replace the VESC on my electric minibike. This is my experience so far, I hope it might be useful to others...
  4. Laerson

    Electric Track Racer

    Thanks for the feedback! I will put some insulation in between the tabs and the battery.
  5. Laerson

    Electric Track Racer

    Hi guys, I finally finished the battery, needles to say it wasn’t as easy as I hoped for. After some research I ordered all the parts I needed, battery spot welder included. After a couple weeks of waiting patiently for the parts to arrive, I started thinking about how to go about building...
  6. Laerson

    Electric Track Racer

    I'm sorry it took this long people. My proffesional life took over for a while and I had absolutely no time to spare. Also, my workshop is 3 hours from where I live.. Progress so far - Last week I ordered parts for the battery pack and a battery spot welder, an update will follow soon!
  7. Laerson

    Electric Track Racer

    Hey peoples, I've been preoccupied with a career change so I didn't have much time lately. So for now, it's just a small update. I installed the brake caliper bracket, fitted the hub motor and did some more finishing on the frame (pickling and brushing). Next up is the front fork tube and...
  8. Laerson

    Electric Track Racer

    That's good to know, thanks! Since I'm not building a drag racer where the heat can dissipate after a short burst, I think running a 130A controller might be overkill anyway, not just for the battery, but also the motor. I gave it some more thought and found a nice 110A controller which I could...
  9. Laerson

    Electric Track Racer

    SlowCo, thanks for the source! I decided to use the stock controller of 65A for now and build a 150A battery to leave some headroom. Once everything works I will buy a more powerful controller of around 130A and do some test runs were I keep increasing the current and check the temperature of...
  10. Laerson

    Electric Track Racer

    It's a 10 inch QS Motor with the following specs: Rated voltage: 48-72V Continuous current: 45A Maximum current: 65A Max. phase current: 180A RPM without load: 650~750
  11. Laerson

    Electric Track Racer

    At the moment I'm doing some research on the battery pack. The controller I have is rated at 72V, 65A (battery current), 180A (phase current), but in the future, I might want to switch it for a higher current controller. I guess my question is: is it safe to do so, and what would be an...
  12. Laerson

    Electric Track Racer

    Yesterday was another lovely day in the workshop. I completed the frame (I had to do some more welding, calibrating and finishing) and started working on the bearing cups which will be pressed into the head tube of the frame. I bought a big aluminium rod at the location hardware store and...
  13. Laerson

    Electric Track Racer

    Yes, I heard that soldering should be really really bad for the cells, so spot welding it is. But I will save this for last. My knowledge about batteries limited, I only build some RC battery packs back in the day. Tell me more master?! :lol: 16kW, that's insane, what kind of controller did...
  14. Laerson

    Electric Track Racer

    Thank you SlowCo, I'm happy to hear you like it! I will probably have an update by the end of next week. You are absolutely right, this model will be naked without any bodywork. There should be more than enough room to remove the battery from underneath the frame. But I wanted to test the hinge...
  15. Laerson

    Electric Track Racer

    As a self-study project, to learn about electric transport, I decided to build a small 10-inch track racer. I thought it might be fun to share this with the community. Specs: Propulsion: Hub motor, 4kW, BLDC Battery: Custom lithium-ion, 72v 1kWh, 18650 cells Wheelbase: 1000mm Seat height: 600mm...
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