Rare-earth-free permanent magnet motor

A permanent magnet motor, comprising:

• a rotor core;
• one or more permanent magnets, each of the one or more permanent magnets being free of rare-earth materials and having a respective magnet depth, wherein the respective magnet depth of a respective magnet of the one or more permanent magnets is measured from a first end of the respective permanent magnet adjacent to the rotor core to a second end of the respective permanent magnet opposite of the first end;
• and
• a stator comprising a stator core and a plurality of stator teeth extending from the stator core toward the one or more permanent magnets and the rotor core, wherein adjacent teeth of the plurality of stator teeth are separated from one another by respective slots having respective slot width, and wherein the plurality of stator teeth each have a respective tooth width ratio, wherein the respective tooth width ratio is a normalized ratio of a tooth width of a respective tooth of the plurality of stator teeth to the slot width, wherein the respective magnet depth and the respective tooth width ratio are selected to achieve a demagnetization ratio of less than 0.1% for the permanent magnet motor.