ian.mich wrote:oh crap, i forgot. i highly doubt raising the LVC will activate regen, as a 60v LVC will activate regen at 84v.
That is the equation. LVC occurs when the whole thing equals 3. the x represents the value in kohm that you replace RJ15k with.
The location of RJ15k can be found in the PDF file layout of the board, it is near the VCC. That is the 15fet board with 75v fets in the PDF. But, I cannot take credit for this. stewrobb gave me the equation.
Guys help me out here, i have that exact board. According to this equation and the LVC resistor i have on my RJ15k spot, (SMD resistor marked 393 -> 39k) the LVC is 101V - if true, i dont think the controller should work at all, atm i only cant get the regen working.. so did I calculate something wrong or.. ? (after spinning the motor up, shorting "low brake" leads do nothing, driving "voltage" into "high brake" also doesnt seem to care about the spinning motor).
I ordered 52v lvc, Leo sent me 32v - still fails on sending instructions on changing the value - but I gathered most information from here.. but now this one makes me question if the info is outdated or has mine set low from software with this heavy resistor and now should play the equation around?
I'm running 16s lipo so thats 60v nominal.
And I believe wrong LVC to be the regen not working fault because of what John said in the thread somewhere in the past.
John in CR wrote:The HVC for regen is determined by the LVC setting, so no you want to decide on a voltage and order your controller with that pack in mind, since the voltage for regen cutoff is fixed and the spread between LVC and HVC isn't great enough to cover multiple voltages. After the fact you can only change LVC via a resistor mod, not terribly difficult but it does require opening the controller.
So If it's 32v atm like Leo said it to be (like wtf application uses 72v controller with 32v lvc anyway?!) then I'm probably "over the regen ceiling" all the time.
Oh and i found from various pictures and information definitions for nr. 1 and nr. 3 on my picture,
nr.1 being just battery voltage, marked usually as "voltage" (for some panel that reads it i guess, having that plug).
nr.3 being "speed signal". Not sure if thats hz or pwm or what, didnt see being mentioned.
but Nr.2 is still the wtf wire, cant use controller when it's connected. On board runs to pads marked "E1" column. Second row is just ground it seems so yeah, E1 it is.