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A compact, single-board controller for a brushless DC (BLDC) reaction wheel.
| MCU | STM32G431CBUx (Cortex-M4F, QFN-48) |
| Gate driver | DRV8311H three-phase BLDC driver |
| Communication | CAN (SN65HVD231) + USB 2.0 (USB-C) |
| Power input | USB-C 5 V and screw-terminal motor supply |
| Layers | 2-layer copper (F.Cu / B.Cu) |
| Outline | ~49 × 49 mm, four corner mounting holes (H1–H4) |
| Designed with | KiCad 10 |
| Reference | Part | Function |
|---|---|---|
| U2 | STM32G431CBUx | Cortex-M4 motor-control MCU (QFN-48) |
| U4 | DRV8311H | Three-phase BLDC gate driver / motor driver |
| U3 | AS5047D | Magnetic rotary position (angle) sensor |
| U5 | SN65HVD231 | CAN transceiver |
| U6 | TPS562200 | Step-down (buck) converter |
| U1 | USBLC6-2SC6 | USB ESD protection |
| D3 | NUP2105L | CAN bus ESD protection |
| Y1 | 16 MHz crystal | MCU clock source |
| J4 | USB-C receptacle |
| Power + USB 2.0 data |
| MT1 | Phoenix screw terminal | Motor power input |
A full bill of materials can be regenerated from the schematic with:
kicad-cli sch export bom reaction-wheel-bldc-motor-control-pcb.kicad_sch -o bom.csv
reaction-wheel-bldc-motor-control-pcb.kicad_sch — schematicreaction-wheel-bldc-motor-control-pcb.kicad_pcb — PCB layoutreaction-wheel-bldc-motor-control-pcb.kicad_pro — KiCad projectDesigned with KiCad 10.
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