What is a brushless motor inner rotor and outer rotor? What is the difference between the two?

Many friends curious about the brushless motor inner rotor and outer rotor, do not know exactly how to distinguish, Vacuz to give you an analysis! I hope it can help you!

Brushless motor rotor has two permanent magnets inside, one is the N pole, one is the S pole.

Brushless motor rotor outside, the stator inside, this is called the outer rotor. On the contrary, it is called the inner rotor.

Brushless motor inside rotor and outside rotor difference.

First, the reference is different, the inner rotor by the inner bearing support of the rotating body; outer rotor: by the outer bearing support of the rotating body, both use the use of rigid connection or additional shaft.

Second, the principle is different

1, inner rotor: the rotor 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, high-speed rotary motion, the rotor ends with rolling bearings, installed and fixed in the motor housing end caps.

2, the outer rotor: in the center of the motor, to maintain magnetic balance. However, in the case of unstable force, any slight displacement will cause the rotor to deviate from its original position, and it may even lose contact with the stator completely. The suspension control of radial position is used to eliminate the eccentric displacement of the motor rotor.

Three, 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 design, beautiful appearance, suitable for installation in the impeller to obtain better cooling effect.

What is brushless motor inner rotor and outer rotor? What is the difference between the two, Vacuz has made a simple explanation above, I hope it can help you!

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