Hi everyone, I’m an aerospace engineering student building a 1U Cubli that balances on 1 and 3 axes using reaction wheels. I need help choosing the right motor driver.
My components:
Motor: Sunnysky 4008 380KV BLDC (x3 for 3-axis)
Battery: Tattu 1300mAh 75C 4S LiPo (~16.8V)
MCU: ESP32
Encoder: AS5600 (connected to ESP32 over I2C for LQR state feedback, not as FOC commutation sensor)
IMU: MPU6050
Application: Reaction wheel torque control, LQR controller running on ESP32
Key constraints:
Must fit 3 drivers inside a 100mm × 100mm × 100mm cube alongside battery and electronics
Needs reliable current/torque control mode
ESP32 will send torque setpoints over UART
Drivers I’m considering:
B-G431B-ESC1, but im concerned about reported overheating issues
Flipsky FSESC 6.7 Mini
SimpleFOC Mini, but worried about current headroom
Which would you recommend for this specific application? Size is a critical constraint. Has anyone built a Cubli or reaction wheel system with any of these? any suggestions would be appreciated, thank you