I'd like to able to alter the regen load dependent on several factors, and the only option appears to be via CAN, which implies i need to go to CAN throttle also, which i don't want to do as i like the fact the motor and inverter just operate without any external Arduino etc on their own.
Is it possible to either use a digital pot controlled by my arduino, or simpler still feed the output of an Arduino adc to the regen input on the inverter ?
Altering regen on the fly
-
- Posts: 321
- Joined: Mon Jul 25, 2022 7:59 pm
- Location: Bicester, Oxfordshire
- Has thanked: 8 times
- Been thanked: 46 times
Altering regen on the fly
E46 touring
Phev rear motor, OEM inverter cabin heater and charger
BMW 9kwh & 12kwh packs
Phev rear motor, OEM inverter cabin heater and charger
BMW 9kwh & 12kwh packs
- Bratitude
- Posts: 784
- Joined: Thu Jan 02, 2020 7:35 pm
- Location: Canada
- Has thanked: 58 times
- Been thanked: 176 times
- Contact:
Re: Altering regen on the fly
you can alter regen on the fly with a pot directly. can is not your only option.
parameter: brknompedal / brakeregen
if your wanting to have the Arduino control regen can is the safest
parameter: brknompedal / brakeregen
if your wanting to have the Arduino control regen can is the safest
https://bratindustries.net/ leaf motor couplers, adapter plates, custom drive train components
- muehlpower
- Posts: 575
- Joined: Fri Oct 11, 2019 10:51 am
- Location: Germany Fürstenfeldbruck
- Has thanked: 12 times
- Been thanked: 103 times
Re: Altering regen on the fly
Here is the input circuit for the LDU. I think it's the same with you. You can, for example, pull the signal externally with a 10kOhm pull-up resistor at 10V to 5V and lower it with an arduino with a mosfet to ground and PWM as you wish.
-
- Posts: 3265
- Joined: Mon Dec 24, 2018 1:37 pm
- Location: Slovenia
- Has thanked: 80 times
- Been thanked: 234 times
- Contact:
Re: Altering regen on the fly
I use a 5K linear pot to open or close power of regen while throttle is released. This is also handy in winter if ice forms on the road. I simply change pot to minimum so regen is near zero.FFMan wrote: ↑Fri Aug 25, 2023 1:52 pm I'd like to able to alter the regen load dependent on several factors, and the only option appears to be via CAN, which implies i need to go to CAN throttle also, which i don't want to do as i like the fact the motor and inverter just operate without any external Arduino etc on their own.
Is it possible to either use a digital pot controlled by my arduino, or simpler still feed the output of an Arduino adc to the regen input on the inverter ?
-
- Posts: 321
- Joined: Mon Jul 25, 2022 7:59 pm
- Location: Bicester, Oxfordshire
- Has thanked: 8 times
- Been thanked: 46 times
Re: Altering regen on the fly
> I use a 5K linear pot to open or close power of regen while throttle is released
you do this with your hand or is it connected to the brake pedal ?
you do this with your hand or is it connected to the brake pedal ?
E46 touring
Phev rear motor, OEM inverter cabin heater and charger
BMW 9kwh & 12kwh packs
Phev rear motor, OEM inverter cabin heater and charger
BMW 9kwh & 12kwh packs
-
- Posts: 3265
- Joined: Mon Dec 24, 2018 1:37 pm
- Location: Slovenia
- Has thanked: 80 times
- Been thanked: 234 times
- Contact:
Re: Altering regen on the fly
I do this by feel. I use 3/4 turn pot with a small threaded rod inside pot plastic. So i can feel where the zero and final position are. And in between...
I did use the colvern 5k linear pot under the brake. But it seems it soon developed irregular reading in the 30% area, just where it matters...