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

Brushless motor rotor can be divided into inner rotor and outer rotor, although they are rotor, but there are still some differences, so what are the advantages and disadvantages of each?Vacuz briefly introduce to you!

In fact, the brushless motor outer rotor and inner rotor have advantages and disadvantages.

The outer rotor has a higher power density, good heat dissipation, and a simpler structure, winding and racking are simpler than the inner rotor.

1. In a compact space, the outer rotor can be centered, the design is more convenient.

2. Uniform impeller air inlet, better cooling effect.

3. No additional tensioning or other devices are needed.

The disadvantages are insufficient sealing, high rotor inertia, and the rotor can only be made into a table-mounted type.

The rotor structure of internal rotor is various, and the rotor inertia is small, and the sealing is good. However, the heat dissipation performance is poor and the power density is low.

What is the difference between the outer rotor and inner rotor of brushless motor? The above is a simple explanation, I hope you can understand, in the design, according to their own requirements, design the rotor structure in line.

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