Hi,
I build my own electric paramotor, similar to SP140. I bought the Motor and ESC (MAD M50 and MAD AMPX 300X controller V3 with PPG box). I want to build also the battery pack and the throttle.
For the battery pack, i will use 21700 cells, 24S12P, but I have some difficulty to find the reliable BMS. The new model S Daly BMS is limited to 20S with Lithium-ion cells (250A). Someone could help me to find a convenient reference (24S/250A, with if possible bluetooth app)?
For the throttle, have you some electric scheme and code to share based on Pico Pi microcontroller? if the RP2040 throttle is open source, is it possible to have PCB scheme and micropython code?
Also, by link between throttle and BMS, I want to check the voltage cells and automatically limit the power if needed to avoid the cut off of the motor when low voltage threshold is reached. Have you some idea to implement this function?
Thanks a lot!
Hi, I’m doing the same thing, bought that bms from ali, hope it is ok https://aliexpress.ru/item/1005007199907796.html?spm=a2g2w.orderdetail.0.0.4c694aa6ryRKgD&sku_id=12000039783790682
Looking forward to seeing your build
Also looking forward to seeing your build – Link didnt work
So many BMS’s out there – need to find some one that has done proven work with them for sure.
BMS
Hi, where did You buy this ESC?
I bought the esc on the mad component website . The last version (v3) seems very interesting because the firmaware is adapted for paramotor application. The ppg box provided with the esc manage all parameters of the esc and the motor.
Thanks a lot, the ANT BMS seems to be perfect for around 100$.
Regarding the throttle, Does anyone have a electronic diagram and code to share?
Did you looked into github code? Throttle is a potentiometer, connected to analog pin on rp2040, here it is in config eppg-controller/inc/sp140/m0-config.h at master · openppg/eppg-controller · GitHub.
But this potentiometer is rare and sold only in America, as my parts arrive I want to use that thumb throttle from electric scooter
If you’re interested, I’ve almost sold all but still have batteries on sell.
Let me know.
Thanks a lot Alex to share the gitHub link. But, after having a look on, I realized that it’s a Raspberry Pico Pi RP2040 microcontroller, with a arduino code. I thought Pico Pi RP2040 can only work with micropython or C code. Is it correct?
The electric diagram associated with the code on Github, is it this one?
RP2040MainBoard.pdf (38.9 KB)
I am a little bite lost…
no, you can use either their python library or arduino code. This project use rtos, scheduling tasks (see main .ino file). If I correct, there is one affinity for esc-related more important task (which use one core) and another for another core
Thanks again Alex. The combination of the use of a dual core microcontroller and freertos library on Arduino seems a smart choice, which can give priority to ESC communication, in parallel of other tasks. I have now to take time to learn more and decipher the arduino code, but more clear for me. Have you electric scheme and associated component list of your throttle to share?
I have already ordered the ANT BMS you suggest. I wait for the delivery of my motor and ESC in March.
No, I don’t, only config file. I received barometer board, wait for display, vbibration board and will try to make controller from them instead of pcb, 3d printing support for these components.
Components on pictures is what used in project, you can see these in dependencies and used libraries
Power is supplied by 5v line from esc.
I ordered these parts. Original controller has components soldered to pcb, I want to place these boards within in two levels and hard-wire them
to make sure everything works I’ll play with display in a separate project first and then try to launch ppg project with everything else but display commented, etc. for other boards
Thanks. Now, I need to go deeper this following weeks on this throttle topic. Don’t hesitate to share your progress on your project. I am doing the same, when I have something to share.
I think already saw around DIY builds someone using this one 24S-220A
Hi jmgd, I have built a custom throttle to control MAD AMPX ESCs via CAN bus and also reading telemetry data like rpm, voltage, etc back to the throttle. Let me know if you need any code or infos
Hi Felix, of course, I am very interesting. Which version have you for MAD AMPX ESC? V1, 2 or 3? because I bought the last version 3, with specific ppg box. I hope, that not change a lot vs V1 or V2. More the drawback of this V3, is the fact there is no more Ubec 5v to supply throttle. How do you supply the voltage to your throttle?