Search results

Date Relevance Most replies

  1. D

    13s charger for low SOC charging

    Luna sells their "advanced" chargers with a 3 position selector for 80, 90 and 100% charge points. https://lunacycle.com/luna-charger-48v-advanced-300w-ebike-charger/ There are probably other sellers of a similar (or identical minus the logo) charger but that's the one that came to mind. Many...
  2. D

    Blown 2 KT controllers in a row

    Yeah I'd also be looking for intermittent phase shorts, either in the wiring harness or possibly inside the motor. Either that or you have very bad luck with controllers. But good luck with AliExpress refunds.
  3. D

    36v DC to 240v AC(uk)

    Whatever inverter you end up with, you'll probably need to install your own XT-60 connector on it. Not likely to get a truly plug and play solution here.
  4. D

    is this post correct?

    Just incorrect data. If you want that motor to actually make it's rated 22HP, you'd need to give it enough work to require that 22HP. If it's not loaded enough, and can just spin up to operating speed, the current will taper off to only what is required to maintain that speed. A forklift...
  5. D

    Source for bidirectional DC power meter?

    I used one of these and a little DPDT switch to reverse the shunt sense wires. Not automatic but as long as I remember to flip the switch it does the job. https://www.ebay.ca/itm/Voltage-Current-Power-Energy-Combo-Meter-Car-Battery-Monitor-DC-6-5V-100V-0-100A/113145508572
  6. D

    Dozens of Bicycles Recovered!

    Canmore has a courthouse?
  7. D

    DIY Motor Dyno/load?

    It's pretty easy to size an alternator as a load. A 10Kw one will be able to convert 10Kw of mechanical energy to electrical energy, it's literally what they're made to do. If you can't get it to do that, you either need to turn it faster or put a more appropriate electrical load. An ebike...
  8. D

    DIY Motor Dyno/load?

    Whatever you do is going to turn mechanical energy into heat at some point, you need to consider where that heat goes. The way you're suggesting seems like all the heat is going to need to be rejected through the windings of the alternator/motor, and I don't see that working well for long...
  9. D

    DIY Motor Dyno/load?

    This is probably the easiest, cheapest and least messy method available to the average person. As long as the water is kept below boiling point you can do this all day, with a pretty decent level of accuracy. You can even just buy bulk nichrome wire and cut it to length to get the desired...
  10. D

    Portable 5-8 amp charger

    Yes many people here have stacked HLGs in series and parallel to charge batteries. They're fully isolated afaik.
  11. D

    Bicycle Speakers

    Exactly, which is why you need to rely on your eyes. We're not good enough as humans at directionalizing sounds to depend on that as a defense mechanism. You need to be looking all around you, all the time. Mirrors just allow you to cover the area behind you without requiring you to look over...
  12. D

    High power ebike means none of the rules apply to me

    Yeah I don't see anything especially dangerous to the public at large there. He's even using a deadman strap!
  13. D

    Bicycle Speakers

    Get some mirrors, and a decent set of headphones. You shouldn't be depending on hearing things coming toward you to save your ass from getting hit, or you will eventually be run over by an electric car with high efficiency tires. It's like that old "loud pipes save lives" bullshit. They don't.
  14. D

    Epic fail- tried to pull out a tree stump, dug it out in 45 min- pulse 144

    Lol just don't die. If you die the tree wins. Well. I guess it would be a tie at that point.
  15. D

    How to charge this battery?

    It can detect the direction of current flow, it can shut off the battery from discharge and then when it detects voltage at the port it will reconnect the port to the battery for charging. Fairly common design, replaces a few big expensive parts with some brains. SIgn of the times man....
  16. D

    Connecting ebike charger correct way round

    You can't assume anything based on wire colors, especially when it comes from China. Check with your multimeter, then check again. Connecting reverse polarity could have results ranging from: The charger simply not working because it's smart enough to know what you did Blowing a fuse on the...
  17. D

    Front suspension or steel frame

    I wouldn't be afraid to try no suspension, if the roads you're riding on are half decent. I've been commuting 30+km a day on a 1974 Nishiki touring bike with no suspension (but a bendy road fork) and 38mm tires, for several years now. I've hit a couple potholes that concerned me, one that...
  18. D

    How to limit current of controller?

    The shunt will run at about the same temperature it does now, because as you increase it's resistance the controller lowers the amount of current running through it accordingly.
  19. D

    How to charge this battery?

    Those 3 wires could be for a few things: -A remote power switch connection to the BMS, possibly with an extra wire for an LED voltage indicator. You might need to connect two of them together to "turn on" the battery. -Output from a USB power converter inside the battery, to be connected to...
  20. D

    What are some good 3000 Watt hub motors for 26inch rims?

    The Cyclone (4th one you listed) is not a hub motor. I think OP was looking for recommendations not the results of a Google search.
  21. D

    BTW, I parallel two identical chargers for a fast charge while attended

    I see no reason for it not to work, connecting two chargers in series would present a few potential issues but in parallel there's no need for isolation, etc.
  22. D

    How to limit current of controller?

    A CA is gonna cost at least as much as a controller. The only practical way you're going to be able to limit current with a non programmable controller is by modifying it's shunt, very carefully cutting a bit of it away to make it thinner. It's not the most scientific process but it will do...
  23. D

    How to limit current of controller?

    Yeah easiest and cheapest is most likely upgrading the phase wiring if it's getting warm for it's entire length. If it's just getting warm in a certain spot then it's probably a bad connection or damaged wire. Even if you can't replace the entire length all the way through the axle inside...
  24. D

    what do i need ? a better controller ?

    Your battery is probably hitting it's low voltage cutoff, which can happen even if it's not "empty", if you're drawing far more current than it's rated to provide. A battery being overdrawn will lower it's voltage output as it struggles to output enough amperage, low enough and the controller...
  25. D

    Stronger connector than MT60?

    Mostly because phase amps aren't continuous, so the conductor will have time to cool between peaks. Current ratings for conductors are subject to a great number of conditions.
Back
Top