Brushless Circular Saw Cooling for High-Power Large Blades

The patent applies parameter changes by transitioning from conventional motor designs to a brushless electric motor with optimized electrical parameters. The motor operates at speeds greater than 15,000 RPM with a battery pack providing up to 20 volts and 100 amperes, achieving power output of at least 1,800 watts. This parameter optimization enables the motor to deliver both high speed and high torque simultaneously, resolving the contradiction between cutting capability and motor power requirements.

The patent employs pneumatic cooling by utilizing the motor's own airflow system to cool the brushless electric motor. The fan integrated with the motor creates a cooling airflow that is directed through the motor housing, effectively dissipating heat generated during high-power operations. This pneumatic cooling approach allows the motor to maintain efficient operation at high power output levels without excessive temperature rise.

The patent replaces conventional mechanical motor systems with a brushless electric motor system. This substitution eliminates mechanical brushes and commutators, reducing maintenance requirements and improving reliability while enabling higher operating speeds. The brushless motor, controlled electronically by a controller that receives input from a trigger switch, provides superior performance for powering large saw blades at high speeds while maintaining reasonable system complexity through electronic control.