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  1. J

    Active pre-charge/inrush control

    What if you used a momentary switch to temporarily ground the FET gate and reset the controller? Hold it down until the motor shuts off and then release
  2. J

    Active pre-charge/inrush control

    Hi Richard, I am using this schematic and am looking into adding a secondary killswitch. I recently experienced a failure in which the motor was continuously fed full power. The SPDT switch already installed is too large and not accessible while riding. Therefore I modified the schematic to...
  3. J

    Active pre-charge/inrush control

    Wow, thank you! Based on these charts, I see no reason not to use the 7537. Not only is it cheaper, but it outperforms the others (except for the 7530, but I am avoiding surface mounts). My BMS maxes out at 60A, so it looks like 3 parallel 7537's would work, but 4 would be ideal.
  4. J

    Active pre-charge/inrush control

    Thank you for all your help guys! I searched around for other MOSFET options and found some suitable alternatives. 7730 has identical specs to the 4110, but lower Rds and lower price, in exchange for 75V max instead of 100V. I'll probably go with this since I don't need over 60V. However...
  5. J

    Active pre-charge/inrush control

    Does the wattage of the 12V Zener diode matter? Mouser has them from 500mW up to 5W. Also, which would be a better MOSFET to use for a 12S (50.4V) 60A application? In the early pages of the thread, the MOSFET specified was IRFB4110. However, in Vedder's implementation of Richard Fechter's...
  6. J

    Active pre-charge/inrush control

    What's the advantage of the switch configuration in the Automatic Precharge 3b compared to this way? On-On toggle switch vs On-Off? Vedder switch: https://github.com/vedderb/SparkSwitch
  7. J

    Active pre-charge/inrush control

    So in this version, the switch is open for ON, and closed for OFF. Do you know if it's possible to wire an ON/OFF switch like this (https://www.amazon.com/dp/B01D2S6LDQ) such that LED turns on when the switch is open? Alternatively, could you use Transistor-Transistor Logic to switch on the...
  8. J

    Active pre-charge/inrush control

    Is this schematic the latest version? I am looking to build this circuit to switch on my 12S system (50.2V max) which pulls 70A max. Thanks!
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