Imported from GitHub: vatsalbansal123/reaction-wheel-controller-pcb · commit 26d5782
Description
Open-source FOC motor controller PCB for a reaction wheel — STM32G431 + DRV8311H driving a BLDC motor, with AS5047D magnetic encoder feedback and a CAN bus interface. Designed in KiCad.
README
Reaction Wheel BLDC Motor Control PCB
A compact, single-board controller for a brushless DC (BLDC) reaction wheel.
Board at a glance
| 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 |
Schematic
PCB
Key Components
| 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 |
Connectors & I/O
- J4 — USB-C (USB 2.0 + power)
- MT1 — 2-pin screw terminal (motor phases / power)
- J1, J2, J5 — 1x4 pin headers
- J3 — 1x3 pin header
- J6 — 1x6 pin header
- SW1 — SPST tactile button
Passives & Discretes
- Capacitors: 10n, 10p, 100n, 0.1u, 1u, 4.7u, 10u, 22u (0402 / 0603 SMD)
- Inductors: 2.2u (0402), 120R ferrite bead (FB1)
- Resistors: 5k1, 10k, 30.1k, 100k (0402 / 0603 SMD)
- Diodes: SS34 Schottky (D1, D2)
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
Design Files
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 project
Designed with KiCad 10.