Brushless Power Tool Output Tuning Through Field Weakening Modes

The patent implements dynamic motor parameter adjustment by allowing the electronic processor to modify motor parameters (such as commutation timing, current waveform, or field weakening levels) in real-time based on selected operational modes. This enables the motor to adapt its characteristics dynamically, providing versatile output adjustment while maintaining a relatively simple overall structure through software-based control rather than additional hardware components.

The patent employs parameter changes by providing multiple predefined operational modes (e.g., high torque mode, high speed mode, variable mode) that correspond to different sets of motor parameters. The electronic processor selects and applies the appropriate parameter set based on user input, enabling task-specific performance optimization without requiring complex real-time calculations or additional hardware. This approach balances productivity enhancement with controlled system complexity.

The patent applies segmentation by dividing the speed control range into distinct operational zones or modes, each with predefined field weakening characteristics. Instead of implementing a continuous complex control algorithm, the system segments the control space into manageable discrete modes (e.g., base speed mode, field weakening mode 1, field weakening mode 2), making the control algorithm simpler while still achieving broad speed control range through the electronic processor's ability to switch between these segmented modes.