1 kW Automotive BLDC Drive System
A compact three phase drive built to move an automotive BLDC motor at 48 V and 21 A continuous, peaking at 1 kW, without ever giving up the feedback or safety an automotive environment demands. A TI DRV8350 gate driver feeds the power stage under closed loop control from encoder, Hall, and three phase current sensing, with CAN and UART for command and telemetry and a hard emergency stop path.
Safety and thermal integrity defined the work. Emergency stop, gate driver fault feedback, overcurrent sensing, and thermal monitoring combine into a layered protection scheme, while carrying 21 A in a compact outline made the power stage layout central: heavy copper, careful thermal dissipation, clean gate drive, and strict separation between the high current path and the sensitive feedback and control circuitry.
Year
04.2025
Scope
Power Electronics, Motor Control, BLDC/PMSM, High Current Layout, Thermal Design, Current Sensing, CAN Bus, Functional Safety, Mixed Signal Design, Altium Designer
Timeline
4 Months
A 48V automotive BLDC controller and driver, 21A continuous and 1 kW peak, with full closed loop feedback and layered safety.
A complete three phase BLDC and PMSM drive rated 48 V at 21 A continuous with 1 kW peak, pairing a TI DRV8350 gate driver and power stage with encoder, Hall, and phase current feedback, CAN and UART control, and built in safety.
