The structural differences between inner rotor fans and outer rotor fans

Nowadays, the fans available on the market are mainly divided into two types: inner rotor fans and outer rotor fans. So, what are the differences between these two? Let's take a look at what the relevant people have to say. Inner rotor fan: The motor stator is fixed, and the rotor drives the impeller to rotate. The motor protection grade is usually IP44 and requires additional heat dissipation design. External rotor fan: The motor is external, the impeller and rotor are integrated, the protection level can reach IP56, and the high-temperature resistance performance is better.