Working Principle and Characteristics of Bipolar Stepper Motors

Bipolar stepper motor is a common type of stepper motor, and its working principle is to use the rotation of the magnetic field to control the rotation angle and speed of the motor. The motor is characterized by the need for four control lines, which can achieve forward and backward, left and right rotation, and the rotation angle and speed can be precisely adjusted according to the size and frequency of the control voltage signal.

The advantages of the bipolar stepping motor are sensitive dynamic response, high control accuracy, small error, and stable rotation performance. Therefore, bipolar stepper motors are widely used in printers, scanners, medical equipment and other fields.

The working principle and characteristics of unipolar stepper motor

The advantages of unipolar stepper motor are simple structure, less control circuit, low cost, high reliability and low noise. Therefore, unipolar stepper motors are suitable for occasions with small size, low power requirement and low control difficulty, such as smart home, smart wearable devices and other fields.

Difference between bipolar stepper motor and unipolar stepper motor

From the above introduction, it can be seen that the main difference between bipolar stepper motors and unipolar stepper motors lies in the number of control wires and the rotation mode. A bipolar stepper motor needs four control lines, and its speed and angle can be adjusted according to the size and frequency of the control signal; while a unipolar stepper motor needs only two control lines, and its speed and angle can be adjusted by the pulse frequency of the control signal.

In addition, bipolar stepper motors usually have higher rotational accuracy and stability, and are suitable for demanding applications. While unipolar stepping motors have the advantages of low cost, simple structure, high reliability, etc. They are suitable for low requirement occasions, but the rotational speed is relatively slow.

In summary, bipolar stepper motor and unipolar stepper motor have their unique advantages and scope of application in practical applications, you can choose the right stepper motor according to the specific needs.