Motor Control Circuit for Electronic Watch Voltage Fluctuation

The patent applies dynamics by making the current threshold variable rather than fixed. The threshold value dynamically adapts to voltage fluctuations, allowing the system to maintain stable motor control under varying voltage conditions. This is achieved through continuous monitoring of voltage and adjusting the threshold proportionally, transforming a static parameter into a dynamic one that responds to environmental changes.

The patent changes the parameter of current threshold from a constant value to a voltage-dependent variable. When voltage fluctuates, the threshold is adjusted proportionally to maintain the correct control ratio. This parameter change allows the system to adapt to voltage variations without increasing overall system complexity, resolving the contradiction between simplicity and stability.

The patent implements feedback by continuously monitoring the voltage and using this information to adjust the current threshold. The system measures the actual voltage condition and feeds this information back to the control logic, which then modifies the threshold proportionally. This feedback mechanism ensures that rotor position estimation remains accurate even when voltage fluctuates, as the threshold adjustment compensates for voltage-induced timing variations.

The patent applies preliminary anti-action by proactively adjusting the current threshold before voltage fluctuations cause measurement errors. By anticipating the effect of voltage changes on ON/OFF timing and pre-adjusting the threshold accordingly, the system prevents rotor position estimation errors from occurring in the first place, rather than attempting to correct them afterward.

The patent extracts the voltage stabilization function from the power supply circuit and relocates it to the control logic. Instead of requiring a complex constant voltage power supply, the system takes out the voltage regulation task and implements it through software-based threshold adjustment. This extraction simplifies the hardware power supply requirements while maintaining stable motor operation through intelligent control.

The patent substitutes a mechanical/electrical solution (constant voltage power supply circuit) with a logical/software solution (voltage-dependent threshold adjustment). By replacing the need for complex voltage regulation hardware with a simple proportional threshold calculation based on measured voltage, the system achieves the same stability effect with significantly reduced circuit complexity.