What is the difference between the inner and outer rotor of brushless DC motor?
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The rotor of a brushless DC motor (BLDC motor) is usually divided into two types: inner rotor and outer rotor.
The rotor of the inner rotor type BLDC motor is located inside the motor and consists of a magnet and a rotor core. The stator contains several electromagnetic coils, and when current passes through these coils, they generate a rotating magnetic field, which interacts with the magnetic field of the rotor magnets to rotate the rotor.
The rotor of an external rotor type brushless DC motor is located outside the motor and consists of a magnet and a rotor core. The stator contains a number of electromagnetic coils which, when current is passed through them, produce a rotating magnetic field which interacts with the magnetic field of the rotor magnet to rotate the rotor.
Because the rotor of an external rotor type brushless DC motor is located outside the motor, it can withstand higher speeds and loads, while the rotor of an internal rotor type brushless DC motor is located inside the motor, making it relatively more compact and lightweight for smaller applications.
In short, the choice between inner and outer rotor depends on the specific application scenario and needs. For more information, please stay tuned to Vshida Micromotors!
