Power tool including a machine learning block for controlling field weakening of a permanent magnet motor

A method of operating a power tool to control field weakening, the method comprising:

• generating, by a sensor of the power tool, sensor data indicative of an operational parameter of the power tool;
• receiving, by an electronic controller of the power tool, the sensor data, the controller including an electronic processor and a memory, wherein the memory includes a machine learning control program for execution by the electronic processor;
• processing the sensor data using a machine learning control program of the machine learning controller;
• generating, using the machine learning control program, an output based on the sensor data, wherein the output includes one or more field weakening parameters, the one or more field weakening parameters including a conduction angle value that modifies a conduction angle of the motor;
• and
• controlling, by the electronic controller, a motor of the power tool based on the output to achieve the target speed.

A power tool comprising:

• a housing;
• a motor supported by the housing;
• a battery pack supported by the housing and configured to provide electrical power to the power tool;
• a user input configured to provide an input signal corresponding to a target speed of the motor;
• a plurality of sensors supported by the housing and configured to generate sensor data indicative of an operational parameter of the power tool;
• an electronic controller, the 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 target speed,
• receive the sensor data,
• process the sensor data using the machine learning control program,
• generate, using the machine learning control program, one or more priority parameters based on the received target speed and the received sensor data,
• generate an output based on the one or more priority parameters and the received sensor data, the output including one or more field weakening parameters, and
• control the motor based on the generated output.