The highest torque diesel engines ever made have turned up in everything from small commercial vehicles to powerful locomotives to mining equipment and more.

(Credit: Cookie Robotics) The choice for a PM rotor in this particular stepper motor is likely due to simplicity, while also providing decent torque when moving as well as when unpowered.

Like other PCB motors it produces very little torque, roughly 2% of a typical NEMA17 stepper motor. Even so, the engineering behind this project remains impressive.

Integrate the motor to a machine, based on analysis of motor equations for voltage, current, torque and speed. Implement the motor and accompanying rotary sensor into a motor control circuit in both ...