Hello everyone,
I am having trouble finding the correct motor parameters for a generic 36V 350W hoverboard BLDC motor using the characteriseMotor() function from the SimpleFOC library.
I have tried running the characteriseMotor() example several times, but the results seem inconsistent/unrealistic.
My motor:
Rated voltage: 36V
Rated power: 350W
It’s the typical hoverboard wheel motor
My questions:
Has anyone successfully characterized this specific type of motor (hoverboard 36V 350W) using characteriseMotor()? If yes, what values did you get for phase resistance (R), phase inductance (L), KV rating, and pole pairs?
If you couldn’t get characteriseMotor() to work, what manual values did you use that worked reliably?
My setup:
MCU: STM32 NUCLEO-64 F445RE
Driver: DRV8302 https://www.aliexpress.com/item/4000126430773.html?spm=a2g0o.productlist.main.14.5fdd65f9ujhoDD&algo_pvid=87d01ebc-4cf8-4ed0-9962-d4f4c98bc243&algo_exp_id=87d01ebc-4cf8-4ed0-9962-d4f4c98bc243-13&pdp_ext_f={“order”%3A"114"%2C"eval"%3A"1"%2C"fromPage"%3A"search"}&pdp_npi=6%40dis!IDR!44782.00!33632.00!!!2.45!1.84!%402101062a17814466248583449e7d5c!12000055943758074!sea!MY!6436098973!ABX!1!0!n_tag%3A-29910%3Bd%3A341f459b%3Bm03_new_user%3A-29895&curPageLogUid=1BrGsTRE7OJj&utparam-url=scene%3Asearch|query_from%3A|x_object_id%3A4000126430773|_p_origin_prod%3A
Thank you for your help!
I digged deep in my code-vault and found some 10" hoverboard specs. (might be the same as 6.5" or 8.5" hoverboard motors)
BLDCMotor motor = BLDCMotor(15, 0.75, 19.0, 0.00119); // 0.00036858);
I used to use the original controller with only a DC-current shunt. But an external amp-meter showed the same current.
The inductivity value is negotiable. IIRC, I used it to add some field weakening.
I also used driver.dead_zone = 0.1f; // default 0.05f and motor.voltage_sensor_align = 6;
to initialize motorFOC