Brushless motors and brushed motors, motor types and their differences

Brushless motors and brushed motors are two common types of motors. They are very different in structure and working principle, so they have their own advantages and disadvantages in different application scenarios. In this article, we will introduce the characteristics, advantages and disadvantages, and application scenarios of brushless motors and brushed motors in detail, and analyze their differences.
1. Characteristics of brushless motors
The brushless motor is also called BLDC motor. Its main feature is that it does not have traditional brushes and collector rings. It uses an electronic controller to control the direction and size of the current through an electronic switch to achieve forward and reverse rotation and speed regulation of the motor. Compared with brushed motors, brushless motors have the following characteristics:
1. Brushless motors have a longer life
Since brushless motors do not have brushes and collector rings, friction and wear are greatly reduced, thereby increasing the life of the motor. In addition, the controller of the brushless motor can automatically adjust the current and voltage according to the actual load of the motor, thereby further extending the life of the motor.
2. Brushless motors are more efficient
The electronic controller of the brushless motor can automatically adjust the current and voltage according to the actual load of the motor, thereby achieving higher efficiency. In contrast, brushed motors are less efficient because they require frequent replacement of brushes and collector rings, which results in energy waste.
3. Brushless motors are quieter
Because brushless motors have no brushes and collector rings, they are quieter. This makes brushless motors widely used in applications that require low noise, such as medical equipment, office equipment, etc.
2. Characteristics of brushed motors
Brushed motors are also called DC motors. Their main features are brushes and collector rings. They use brushes and collector rings to achieve forward and reverse current and speed regulation. Compared with brushless motors, brushed motors have the following characteristics:
1. Brushed motors are cheaper
Because the structure of brushed motors is simpler, their cost is lower. In addition, the controller of brushed motors is also simpler, so maintenance and debugging are also easier.
2. Brushed motors are smoother to start and adjust speed
Because the controller of brushed motors is simpler, their start and speed regulation are smoother. This makes brushed motors widely used in applications that require higher precision, such as machine tools, precision instruments, etc.
3. Brushed motors have better torque performance
Due to the simpler structure of brushed motors, their torque performance is better. This makes brushed motors widely used in applications that require larger torque, such as power tools, car air conditioners, etc.
3. The difference between brushless motors and brushed motors
From the above introduction, it can be seen that brushless motors and brushed motors are very different in structure, working principle, characteristics, etc. Below we will summarize their differences:
1. Different structures
Brushless motors use electronic controllers and do not have traditional brushes and collector rings; while brushed motors have brushes and collector rings.
2. Different working principles
Brushless motors use electronic controllers to control the direction and size of current, thereby achieving forward and reverse rotation and speed regulation of the motor; while brushed motors use brushes and collector rings to achieve forward and reverse rotation and speed regulation of current.
3. Different characteristics
Brushless motors have longer life, higher efficiency, and lower noise; while brushed motors have lower costs, smoother starting and speed regulation, and better torque performance.
4. Application scenarios of brushless motors and brushed motors
Since brushless motors and brushed motors have very different characteristics, their application scenarios are also very different. Below we will summarize their application scenarios:
1. Application scenarios of brushless motors
Brushless motors are widely used in application scenarios that require long life, high efficiency, and low noise, such as:
(1) Medical equipment: such as operating tables, chairs, ventilators, etc.
(2) Office equipment: such as printers, scanners, copiers, etc.
(3) Household appliances: such as vacuum cleaners, washing machines, ovens, etc.
2. Application scenarios of brushed motors
Brushed motors are widely used in application scenarios that require low cost, smooth starting and speed regulation, and good torque performance, such as:
(1) Power tools: such as drilling machines, grinders, hammers, etc.
(2) Automotive air conditioners: such as compressors, fans, etc.
(3) Machine tools: such as lathes, milling machines, drilling machines, etc.
Brushless motors and brushed motors are two common types of motors. They are very different in structure and working principle, so they have their own advantages and disadvantages in different application scenarios. The characteristics of brushless motors are longer life, higher efficiency, and lower noise; the characteristics of brushed motors are lower cost, smoother starting and speed regulation, and better torque performance. According to their characteristics, we can choose the appropriate motor type in different application scenarios.