Optimized skew in interior permanent magnet synchronous motors

An electric motor comprising:

• a rotor;
• a first pole of the rotor;
• and
• a first magnet stack associated with the first pole comprising a set of magnets disposed proximate the rotor arranged according to a skewed arrangement and including at least a first magnet having a first length, a second magnet having a second length, and a third magnet having a third length, wherein the first length is the same as the third length.

A method for controlling cogging torque of an electric motor, the method comprising:

• providing, at a first magnet stack of a first pole of a rotor associated with the electric motor, a first set of magnets;
• and
• arranging magnets of the first set of magnets according to a six-step V-skewed arrangement, wherein:
• the first set of magnets includes a first magnet having a first axial length, a second magnet having a second axial length, a third magnet having a third axial length, a fourth magnet having a fourth axial length, a fifth magnet having a fifth axial length, and a sixth magnet having a sixth axial length,
• the first axial length is the same as the third axial length, the fourth axial length, and the sixth axial length,
• the second axial length is one of the same as the first axial length and less than the first axial length, and
• the fifth axial length is one of the same as the fourth axial length and less than the fourth axial length.