Physics and Circuitry of Brushless Motors and Drivers

This Habr article provides a detailed technical overview of brushless DC (BLDC) motors, which are widely used in modern technology—from electric vehicles to high-precision camera stabilization systems. The author aims to deeply analyze the physical processes underlying the operation of these motors and examine the circuit design solutions used in their drivers. The material covers the principles of three-phase control necessary for the efficient operation of BLDC motors. The article is useful for engineers and enthusiasts who want to understand the internal structure of these components at the level of circuitry and electrodynamics, rather than treating them as 'black boxes.' The author consistently reveals the relationship between physical phenomena and practical control methods, providing a better understanding of the complexity and efficiency of this technology in various engineering tasks.