What types of motors are there? I understand now

Release Time：

2025-05-09

Electric motors are a type of driving component commonly used in consumer electronics, household appliances, automation equipment, and other fields, characterized by small

What types of motors are there? I understand now
Electric motors are a type of driving component commonly used in consumer electronics, household appliances, automation equipment, and other fields, characterized by small size, moderate power, and low noise. According to their different working principles, structures, and application scenarios, motors can be divided into several common types: DC brushed motors, brushless DC motors (BLDC), stepper motors, AC motors, vibration motors, and servo motors. Each type of motor has its unique working principle, structural composition

DC brushed motor

Working principle

A DC motor generates a magnetic field and rotates the motor by continuously changing the direction of current through the coordination of brushes and commutators. The magnitude of the applied voltage determines the rotational speed, while direction control is achieved by changing the direction of the current.

Structural composition
Stator: Contains electromagnets or permanent magnets that provide a static magnetic field.

Rotor (armature): The rotating part of a motor, usually composed of coils.

Electric brush and commutator: The electric brush contacts the commutator to switch the current and ensure the continuous rotation of the motor.

application
Electric tool

Small fan

Robot driven

toy

advantages and disadvantages
Advantages: Simple structure, easy control, good speed regulation performance, and low cost.

Disadvantages: Regular replacement of brushes is required, resulting in high operating noise and low efficiency.

model selection
Suitable for products that require control of speed, minimal load changes, and low cost.

stepping motor

Working principle
The stepper motor rotates at a certain angle through the input electrical pulse signal. Every time a pulse signal is received, the motor rotates at a predetermined angle (step angle). Stepper motors have no slip rings or brushes, resulting in high control accuracy.

Structural composition
Stator: composed of electromagnets, used to generate a rotating magnetic field.

Rotor: usually composed of permanent magnets, used to respond to changes in the stator magnetic field.

Driver: Provides precise pulse signals for controlling the rotation of the motor.

application
printer

precision machinery

automation equipment

3D printer

advantages and disadvantages
Advantages: High positioning accuracy, simple control, brushless motor without wear.

Disadvantages: Low speed, insufficient torque, may cause vibration or noise.

model selection
Suitable for situations that require precise position control and do not require high speeds, such as 3D printing and automation equipment.

Suitable for equipment that requires stable operation and does not have precise speed requirements.