What is the difference between an Inrunner and outrunner motor?
“ The permanent magnets on the outrunner are placed on the rotor and the rotor spins on the outside case. On the inside of the motor are the stator windings which do not rotate, they are fixed in position. On the inrunner motor the complete opposite true for how it is built. On the outer side of the motor is the case. The case in this situation does not rotate and is fixed. The difference of course being that they are now at the center of the motor. For most, this would be the more conventional type of electric motor, especially if you are familiar with large AC motors or even old brushed DC motors. “