Search results

Date Relevance Most replies

  1. J

    hacking into chinese bms board to get overcharge signal

    I am trying to finish up an ebike setup and the last thing that is driving me crazy is to setup a led to indicate the battery is full while the charge is hooked up. My charger is just a dumb power supply and have lifepo4 cells. I am using one of those cheap chinese bms boards that has mosfets...
  2. J

    Four wire rotor position sensor? In WheelChair motor

    I picked up a free Invacare Arrow electric wheelchair with dead batteries and a missing joystick control. I am trying to see if I can hack into the motor controller, it uses a MSP430 processor to control the two motors. I could not figure out from the circuit board what the position sensors...
  3. J

    3 phase without 6 switches

    Ok, gotta ask this question..I'm building a wheel/hub bldc motor and was thinking can I make a controller that simple cycles through three coils? So instead of delta or star, it is star with a permanent ground at the star. Thus, turn on power to A, then B, then C, then back to A. Now I...
  4. J

    One-Phase Generator Rewind to 3-Phase BLDC

    I am rewinding/modifying a generator head from 120vac single phase into a 3-phase BLDC. I think I know how to do this, but before I spend the many hours it takes to rewind, I'd like to make sure I'm doing it right. ;) This generator head stator has 30 slots. Picture below after I have removed...
  5. J

    Measuring Inductance

    I have been building a DC Motor controller, and to test it I want to create a dummy load that has the same inductance as the motor it will be controller, at least in the ballpark. So researching into how to measure inductance, I've found a few methods, and what looks like a simple way is to...
  6. J

    Pouch Packs -- Stapling Tabs

    I just finished testing over 300 pouch cells. It took weeks to do them all, but it was neccessary, as they were used and some dead, so only way was to break them down into single pouches and test each one. The good news is most of them were good to very good. Some poor and some totally dead...
  7. J

    What to do with large solar power excessive

    I'm going to have 4k watt of solar on my boat, my batteries will be full after one day. Now what? I've been trying to figure out a way to somehow store all this excess energy. I would like to convert it to ethanol or some other high density liquid fuel to run an ICE, any ideas?
  8. J

    Stepper Motor for Propulsion

    Hello, I was wondering how well a stepper motor might work for propulsion, or if it can be modified for that purpose. I have a large 1.8 degree step motor, it is rated at 1.5hp. Thanks, Jack
Back
Top