1、 Working principle of brushless DC motor

A brushless DC motor is a synchronous motor whose rotor is composed of magnets and rotates by controlling the current on the stator. BLDC motors do not have brushes or brush rings, and the magnets on the rotor are controlled by electronic components. Therefore, BLDC motors have the advantages of high efficiency, high reliability, and low noise.

Brushless DC motors are typically composed of electronic components (such as power MOSFETs, IGBTs, integrated circuits, etc.), rotors, stators, and sensors. During operation, the controller energizes the stator of the motor and adjusts the current to a specific waveform. Sensors are used to monitor the position and speed of the motor and provide feedback to the controller, so that the controller can adjust the phase and magnitude of the current to control the speed and direction of the motor.

2、 Characteristics of Brushless DC Motors

1. High efficiency: BLDC motors do not have brush friction and can achieve efficient conversion, making them more energy-efficient than traditional brushless DC motors.

2. High precision: The BLDC motor adopts digital control technology, which can accurately control the speed and direction of the motor, so it can be used in high-precision applications.

3. High reliability: BLDC motors have high reliability and long lifespan due to the lack of brushes and brush rings, which will not cause faults due to brush wear.

4. Low noise: BLDC motors do not have brush friction and commutation current noise, so the noise level is very low.

5. Easy to maintain: BLDC motors do not require regular replacement of brushes and brush rings, resulting in low maintenance costs.

3、 Application Fields of Brushless DC Motors

BLDC motors are widely used in many fields, including:

1. Medical equipment: BLDC motors can be used for medical equipment, such as surgical robots, drug delivery pumps, ventilators, etc.

2. Industrial automation: BLDC motors can be used in industrial automation equipment, such as machine tools, printing machines, food processing machinery, etc.

3. Household appliances: BLDC motors can be used for household appliances such as washing machines, dishwashers, vacuum cleaners, etc.

4. Automotive industry: BLDC motors can be used in electric vehicles, hybrid vehicles, electric bicycles, etc.

5. Aerospace: BLDC motors can be used in the aerospace field, such as navigation equipment, drones, etc.

6. New energy field: BLDC motors can be used for wind turbines, solar generators, hydroelectric generators, etc.