Search results

  1. T

    Figuring out the wiring for a hall sensor

    Hi all, We got this hooked up and it is running but it is very low power. We tried a different motor on it and got the same result. It is running at far less than half the speed we expect and that is on the rack so not under load. Do you think this could this still be the result of the phase...
  2. T

    Figuring out the wiring for a hall sensor

    Ah, I see, your colours are going from right to left in the photo is that correct? You are referring to the far right pin as pin 1, is that correct?
  3. T

    Figuring out the wiring for a hall sensor

    Sorry about the photo. I couldn't get the wires pulled any further out. Going from left to right it is: Pin 1=Green, Pin 2 = Black, Pin 3= Orange, Pin 4 = Grey, Pin 5 = White and Pin 6 = Brown.
  4. T

    Figuring out the wiring for a hall sensor

    Ah, the phase wires are brown/white and grey but not sure how to interpret that.
  5. T

    Figuring out the wiring for a hall sensor

    The old controller isn't working. I've disassembled the motor to see if we can identify the wiring plan I've attached a couple of photos of the hall sensor board. Remembering that the Green wire is not connected to anything on the bike and that it also is connected to a terminal on the board...
  6. T

    Figuring out the wiring for a hall sensor

    There are a few numbers on the PCB such as C37 but I imagine they are not informative.
  7. T

    Figuring out the wiring for a hall sensor

    They all have independent locations on the PCB with no traceable common path.
  8. T

    Figuring out the wiring for a hall sensor

    I've opened the old unit and there is no helpful markings on the PCB where the 5 wires are attached. They are all grouped into 4mm space.
  9. T

    Figuring out the wiring for a hall sensor

    If we assume that black and brown are positive and negative is there a way to determine for the other 3 wires?
  10. T

    Figuring out the wiring for a hall sensor

    Is there a resistance or continuity measurement that can be done on the 3 wires to determine their wiring series?
  11. T

    Figuring out the wiring for a hall sensor

    Hi Pete, The wires on the old controller are the same colours as the ones coming from the motor. The speed sensor is an old style magnet job on the rear wheel. Good point about the white wire from the motor however. It made me look at the loom going from the motor to the control unit. So the...
  12. T

    Figuring out the wiring for a hall sensor

    Hi, We have a Giant Twist on which we are replacing the control unit. We have a problem with wiring the hall sensor. The hall sensor wires from the bike are Black/Brown/White/Grey/Orange/Green. The wires on the control unit are the standard stuff Black/Red/Blue/Green/Yellow. I'm trying to...
  13. T

    What shuts down the electrical system when it has not been used for a bit?

    Most electric bikes will turn themselves off if they are not used for a number of minutes. What component manages this? I always assumed it was the control unit box but I have a battery here that you can turn on with the key but if you leave it for about 30 minutes, it shuts down to no output...
  14. T

    Extra wires on BMS

    Ah, so the Lifepo4 Max out at 3.2V rather than 4.2 so it requires more cell groups to reach the desired voltage. That makes sense.
  15. T

    Extra wires on BMS

    Ah, okay there there are no BMS boards with extra S wires. They are just mislabled.
  16. T

    Extra wires on BMS

    Yea, that's what I think as well but here it is...
  17. T

    Extra wires on BMS

    I've noticed that some BMS boards have more red wires than is necessary for the number of cell packs for that voltage. For instance, a 48V 16s board when you only need 13s to get to a 48V battery. What are these extra wires for and what can you do with them if you have more than is needed? I...
  18. T

    Battery Issue

    Yes, that explains it. It was cell group 10 and it was reading .5V so it was dropping out other cell groups. The other groups were reading between 3.1V and 3.5V. Part of my confusion came from the assumption that the charger would only indicate a full charge when the battery reached a certain...
  19. T

    Battery Issue

    Thanks, Yes, one of the cell groups was just about flat. If you don't mind me asking another question. How do you check a BMS to see if it is okay? This battery was still measuring 50V on the battery but only 38V on the output line of the BMS.
  20. T

    Battery Issue

    Hi all, One of my customers has a 48V 20Ah battery. When he plugs it in to the bike nothing happens at all. He assumed this was the BMS so he asked me to put a new one in which I did the old one was in wrong anyway. It had the B- going to the charger/power out and the P- going to the negative on...