BLDC Mobility Assist Control for Smooth Speed Switching

The patent implements dynamic speed adjustment by dividing the speed transition into multiple intermediate steps rather than a direct switch. The control system dynamically calculates intermediate speed values between low and medium speeds, and transitions through these steps sequentially, allowing the motor to adapt gradually to speed changes and avoiding sudden torque variations that cause vibration.

The patent employs periodic speed adjustment actions by implementing a stepwise transition process. The motor speed is adjusted in discrete time intervals through multiple intermediate steps, creating a periodic control pattern that smooths the transition and prevents harmful vibrations while still achieving the required speed change.

The patent implements self-service control by using the motor's own back-EMF signals and current measurements to infer speed and position information. The control system processes these inherently available signals through algorithms to achieve accurate speed detection and control without requiring additional expensive sensors, making the system self-sufficient and cost-effective.

The patent replaces mechanical sensing systems (such as encoders or Hall sensors) with an electronic control system that uses electrical measurements and mathematical algorithms to achieve speed detection. This substitution of mechanical sensing with electronic control reduces hardware complexity and cost while maintaining or improving measurement precision.