BLDC Motor Controller V2
A second BLDC motor controller design aiming to fix some of the issues with my last design with more conservative specs and a more thorough design process. Using a similar DRV8320, NTTFSSCH1D3N04XL FETs, INA241 for inline current sensing, and a STM32G474 MCU. Aiming for operation at up to 24V 30A.
Specifications & Design Targets:
- Up to 24V operation
- 30A continuous current at stall, 50A+ peak phase current (transiently)
- Three-phase inline current sensing
- Phase voltage sensing for sensorless commutation
- On board encoder (MA702) to enable sensored FOC operation without any external components
- RS485 interface for sensor communication (capable of SSI over RS485 for external absolute encoder)
- CAN and serial interfaces for control
- 5V tolerant GPIO for interfacing with hall effect sensors
- Convenient form factor for mounting into a compact BLDC actuator design
- FETs located specifically for ease of cooling
- XT60 for power and MR60 for phase connections
- Specifically tuned for low ripple at a switching frequency of 24kHz
Development
Gallery
