With the continuous development of science and technology, the market of motor industry is getting bigger and bigger, and the application of brushless motor is gradually replacing the brushed motor and occupying the market. Brushless motor mainly consists of main body and driver, self-controlled operation, is a typical mechatronics product, favored by the majority of customers.

Many friends often ask to the brushless motor inner rotor and outer rotor, not quite understand the difference between the two and different, has been more confused, Vacuz briefly give you an analysis of it! Hope it can help you!

Brushless motor rotor structure composition of the situation.

Brushless motor rotor structure: the rotor has two permanent magnets inside, one N pole, one S pole. Outer rotor brushless motor, that is, the motor’s rotor outside, the stator inside.

Brushless motor inner rotor and outer rotor difference.

First, the reference is different

1. Internal rotor:A rotating body supported by internal bearings. Use rigid connection or additional shaft.

2.Outer rotor:Rotating body supported by outer bearing. Adopt rigid connection or additional shaft.

Second, the principle is different

1. Inner rotor: The rotor of induction motor consists of a rotating iron core and a closed conductor embedded in the core, driven by the rotating magnetic field generated by the stator winding to produce high-speed rotational motion. The rotor is driven by the rotating magnetic field generated by the stator winding to produce high speed rotational motion.

2. Outer rotor:In the center of the motor, maintaining magnetic balance. However, in the case of force instability, any slight displacement can cause the rotor to deviate from its original position and may even lose contact with the stator completely. Radial position suspension control is used to eliminate the eccentric displacement of the motor rotor.

Third, different uses

1.Inner rotor:The main part of high speed rotation in power machinery or working machinery such as electric motor, generator, gas turbine, turbo compressor, etc.

2. Outer rotor: space-saving, compact and beautiful design. Suitable for installation inside the impeller with the best cooling effect. No need for v-belt, extra tension belt or other equipment.

The above is the difference between the brushless motor inner rotor and outer rotor and different, for friends who are learning, grasp the relevant knowledge or necessary, I hope there is help to everyone!

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