Brushless direct current motor (BLDC) structure, application field and working principle are explained in detail

Operation diagram of BLDC motor

    BLDC motors are widely used in many fields due to their high efficiency, high power density, low maintenance and reliability, including but not limited to:

    Household appliances: such as washing machines, refrigerators, vacuum cleaners, etc.

    Cars and vehicles: such as electric cars, electric bicycles, electric scooters, etc.

    Aerospace: such as aircraft landing gear, auxiliary power systems, etc.

    Industry: such as mechanical equipment, automated production lines, etc.

    The working principle of the BLDC motor is based on the magnetic field interaction between the stator and rotor of the motor. BLDC motors are usually driven by electronic control, which works as follows:

    Stator magnetic field generation: When a current passes through the stator winding, a magnetic field is generated.

    Rotor magnetic field induction: The permanent magnet in the rotor senses the magnetic field generated by the stator, resulting in torque.

    Electronic control: Through the electronic controller, according to the rotor position and speed information fed back by the sensor, the current of the stator winding is switched timely to maintain the rotation direction and speed.

    Rotation: According to the instructions of the electronic controller, the current in the stator winding is switched according to the change of the rotor position in time, resulting in a rotating torque, so that the rotor rotates.