BLDC Auger Speed Control for Nugget Ice Clog Removal

The patent applies dynamics by transitioning from a fixed-speed motor to a variable-speed BLDC motor that can adjust its rotational speed dynamically. The controller modulates the motor speed based on different operational modes (ice making, unclogging, etc.), enabling the auger to operate at optimal speeds for different ice production requirements. This dynamic speed adjustment directly improves ice production versatility while managing system complexity through electronic control.

The patent implements periodic action through a multi-stage unclogging process. When ice clogs are detected, the BLDC motor executes a specific sequence: first rotating at high speed to fracture the clog, then reversing direction to expel debris, and finally rotating in the normal direction to clear remaining obstructions. This periodic, multi-phase action pattern significantly improves clog removal reliability compared to continuous single-speed operation.

The patent applies dynamics by implementing variable speed control of the BLDC motor based on the ice production phase and desired ice quality. The controller adjusts motor speed dynamically during operation, using higher speeds for efficient ice production when quality constraints are less critical, and lower speeds when precise control of ice consistency and hardness is required. This dynamic adjustment resolves the contradiction between productivity and manufacturing precision.

The patent replaces traditional mechanical speed control mechanisms (such as mechanical governors, belt drives, or multi-gear systems) with electronic control of a BLDC motor. The controller uses electronic commutation and pulse-width modulation (PWM) techniques to achieve precise speed control without mechanical complexity. This substitution maintains ice production versatility while significantly reducing mechanical device complexity.