<p>➀ The article discusses a reference design for drone electronic speed controllers (ESCs), focusing on the STEVAL-ESC001V1 by ST Microelectronics, designed specifically for entry-level commercial drones.</p><p>➁ The design supports three-phase brushless (BLDC) and permanent magnet synchronous motors (PMSM), with a peak current handling capacity of up to 30A, powered by 6S LiPo batteries or similar DC sources.</p><p>➂ Key features include an advanced sensorless field-oriented control (FOC) algorithm, support for motor parameter optimization via the ST Motor Profiler, and integrated safety features like overcurrent and overvoltage protection, making it suitable for small UAVs and RC vehicles.</p>