Power tool stall detection

A method of operating a power tool comprising:

• generating, by a plurality of sensors, sensor data indicative of an operational state of the power tool, the plurality of sensors including a temperature sensor configured to sense a temperature associated with an inverter of the power tool;
• receiving, by an electronic controller of the power tool, the sensor data indicative of the operational state of the power tool;
• processing, by the electronic controller of the power tool, the sensor data using a machine learning control program to determine whether the power tool is experiencing a stall condition;
• processing, by the electronic controller of the power tool, the sensor data using the machine learning control program to distinguish between the stall condition and a cold startup operation;
• and
• disabling a motor of the power tool when the power tool is determined to be experiencing the stall condition.

A power tool comprising:

• a housing;
• a motor supported by the housing;
• an inverter;
• a battery pack interface configured to receive a battery pack;
• a plurality of sensors configured to generate sensor data indicative of an operational state of the power tool, the plurality of sensors including a temperature sensor configured to sense a temperature associated with the inverter, a current sensor, a speed sensor, and a motion sensor;
• and
• an electronic controller including an electronic processor and a memory, the memory including a machine learning control program for execution by the electronic processor, the electronic controller configured to:
• receive the sensor data indicative of the operational state of the power tool,
• process the sensor data using the machine learning control program to determine whether the motor is experiencing a stall condition,
• process the sensor data using the machine learning control program to distinguish between the stall condition and a cold startup operation, and
• disable the motor when the motor is determined to be experiencing the stall condition.