bipolar stepper motor

A bipolar stepper motor (also called a two-phase stepper motor) is a motor that can convert electrical pulse signals into precise angular displacement or linear displacement. The bipolar stepper motor contains two independent coils inside, each with two wires, for a total of four wires. This design allows the motor to reverse by changing the direction of the current in the coil during operation, thereby reversing the motor without changing the motor structure.