What is the External Rotor Brushless Motor?

External rotor DC brushless motor is a modern motor technology, it is the main material of permanent magnet material motor. Compared with the traditional brushed motor, it has higher efficiency and longer service life. The main feature is that the rotor of the whole motor is made of permanent magnet material, and it rotates on the outside of the motor. Compared with the traditional brushed motor, the electronic control system is more advanced and can achieve higher control accuracy and lower energy consumption.

The outer and inner rotors are two common types of brushless motors. They differ in the position and structure of the rotor. The outer rotor places the rotor outside the stator, the stator is internal; the inner rotor places the rotor inside the stator, the stator is external. The outer rotor is a cylindrical shell covered with core, coil and magnetic steel; the inner rotor is a circular core with coil and magnetic steel. The difference of these two motor structures will affect their performance and application range. The outer rotor usually has high output power and rotation speed, which is suitable for industrial automation, robot and other fields. The inner rotor usually has high torque and low speed output performance, suitable for home appliances, aviation model, remote control and other fields. No matter what type of brushless motor is chosen to use, it needs to choose according to the specific requirements. At the same time, attention should be paid to the reasonable selection of the motor controller and driver to ensure that the motor has better performance and stability.

It is widely used in unmanned drones. They can provide high-speed, efficient power, while still maintaining a lightweight and modular design. This advantage makes it a hot choice in the drone market. It can provide high speed and high torque for power tools, and better working efficiency can be achieved by controlling the speed and direction of the motor. These features become the preferred choice for power tool manufacturers. It is a key component for home appliance manufacturers because of its low noise and high efficiency. For example, they are used in air purifiers, range hoods, fans, vacuum cleaners and other household appliances. It is widely used in hybrid electric vehicles, electric vehicles, and some auxiliary driving functions, such as brakes, cruise control, etc. In industrial automation production lines, is used as drive spare parts. They can control the speed and direction of the motor through an electronic governor, making the machine run more efficiently.

Used brushless motor friends mostly have this feeling, at the same level of the brushmotor, the rotor and the rotor power comparison, will find the rotor motor torque, to "hard", the rotor motor torque slightly smaller, to "soft", a look at the motor parameters, the rotor motor KV value more than 800, the rotor motor more than 1000 to more than 2000. Look at the speed, the speed of the inner rotor motor is significantly higher than the outer rotor motor. In fact, these characteristics are related to the KV value. According to the definition of KV value, the idling speed of the brushless motor is the KV value multiplied by the input voltage, which also explains why the speed of the inner rotor motor is higher than that of the outer rotor motor.

Inner rotation = motor working rotation design inside static part design outside outer rotation = motor rotation design outside use DC permanent magnet brush iron motor energy saving, high efficiency especially high speed (several times than iron) 30,000-50,000 are not special weight reduction 1 / 3-2 / 5 should be said to be the best. There is no difference between the internal and external principle surface of the electromagnetic structure surface with the surface of the turbine fan surface are compared with convenient products in the inner period of accessories supply conditions in addition to the advantages of the high speed surface.

First, connect the motor to the power supply. At this time, the motor is not working, but you can feel that the rotor has a certain rotational resistance, which is due to the interaction of the internal magnetic field. Next, a power supply signal is applied to the motor. The controller inside the motor generates different current output according to the signal frequency, which generates different magnetic fields to drive the external rotor to rotate. During operation, the rotation of the outer rotor creates a potential, which generates a feedback signal on the sensors inside the motor. The controller will adjust the output current according to the feedback signal to rotate the rotor steadily. When the motor speed needs to be adjusted or stop, only need to change the signal input to the motor, the controller will adjust the current output accordingly, thus change the rotation speed of the rotor or stop the rotation. It should be noted that, when using, attention should be paid to maintain the compatibility of the motor and the power supply, to avoid the motor overload or the power supply overvoltage. At the same time, attention should be paid to the motor heat dissipation, to avoid overheating and damage to the motor.

The above is our VSD motor to share with you about the expertise of mini external rotor brushless DC motor. For more information, please contact our professional customer service personnel to answer. Thank you for clicking and watching.