Understanding the stepper motor and servo motor
A stepper motor can be referred to as a type of brushless DC motor that divides its full rotation into a number of equal steps and rotates in steps. They have multiple coils organized in phases. The motor will rotate each step at a time as each phase are being energized in sequence.
Basically, stepper motor are of two types:
- Unipolar
- Bipolar
Let’s check them in detail in the following sections.
Unipolar stepper motor
This usually has 6 wires or sometimes 5 wires as shown in following diagram. It has one winding with a center tap per phase:
Let’s have a look at Bipolar stepper motor.
Bipolar stepper motor
This usually have 4 wires. It also has one winding per phase but does not have a center tap. They have more torque and are more efficient than unipolar stepper motor:
Let’s now learn how to drive a stepper motor.