When we delve into the innovation and development of modern motor technology, we have to mention the two epoch-making motor types, electronically commutated motors and brushless DC motors. Although they are slightly different in naming, in essence, electronically commutated motors and brushless DC motors refer to the same type of motors, that is, they both use advanced electronic commutation technology to completely replace the mechanical commutator and brush structure in traditional DC motors. This revolutionary change not only marks a major leap in motor technology, but also injects new vitality and possibilities into the development of the motor industry.
- Definition and characteristics of electronically commutated motors
1) Definition:
Electronic commutated motors, also known as brushless DC motors (BLDC) or electronic rectifier motors, are a type of motor that uses an electronic controller to control the direction of the current inside the motor.
2) Features:
The direction of the current is precisely controlled by the electronic controller to achieve the rotation of the motor.
The mechanical commutator and brushes are eliminated, the structure is simpler, and the failure points and wear are reduced.
It has the advantages of high efficiency, high reliability, low noise and low maintenance cost.
- Definition and characteristics of brushless DC motor
1) Definition:
Brushless DC motor (BLDC) is essentially a permanent magnet synchronous motor with position feedback that uses DC power input and uses an inverter to convert it into a three-phase AC power supply.
2) Characteristics:
Like the electronic commutation motor, it also uses electronic commutation technology.
The rotor is equipped with permanent magnets, and the stator has windings. The power-on sequence and current direction of the windings are controlled by an electronic controller to drive the motor to rotate.
It has the advantages of high efficiency, energy saving, low noise, and long life.
- Relationship between electronic commutation motor and brushless DC motor
1) Same in nature:
Electronic commutation motors and brushless DC motors are essentially motors that use electronic commutation technology to replace the mechanical commutator and brushes of traditional DC motors.
2) Naming differences:
The two are slightly different in naming, but they are actually the same type of motor. Electronic commutation motors focus more on describing their working principles, that is, controlling the direction of current through electronic controllers; while brushless DC motors focus more on describing their structural characteristics, that is, there are no mechanical commutators and brushes.
- Application fields
Electronic commutation motors (brushless DC motors) are widely used in various fields due to their high efficiency, energy saving, low noise, and long life, such as:
1) Household appliances: such as fans, air conditioners, washing machines, etc.
2) Automobile industry: such as electric power steering, electric power braking, etc.
3) Industrial automation: such as machine tools, printing presses, etc.
4) Aerospace: such as drones, satellites, etc.
As can be seen from the above, there is no essential difference between electronic commutation motors and brushless DC motors. They are all motors that use electronic commutation technology to replace the mechanical commutator and brushes of traditional DC motors. They have the same advantages and a wide range of applications, and are gradually becoming an important force in promoting industrial upgrading and green development.
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