Motor rotor and motor having same

An electric motor, comprising:

• an electric motor stator provided with a stator bore and a plurality of stator slots surrounding the stator bore, wherein the stator slots are in communication with the stator bore, and a stator tooth is defined between adjacent stator slots;
• and
• an electric motor rotor comprising:
• a rotor body provided with a rotor bore and a plurality of magnetic steel slots surrounding the rotor bore, wherein an outer contour of the rotor body comprises a plurality of concentric arc segments in concentric with the rotor bore and a plurality of connecting line segments connecting adjacent concentric arc segments, the plurality of concentric arc segments are respectively corresponding to the plurality of magnetic steel slots in a radial direction, and the connecting line segment comprises at least one straight line segment, in which an included angle β between a central normal line of each straight line segment and a connecting line between a midpoint of the straight line segment and a center of the rotor bore satisfies 0≦β≦20;
• and
• a plurality of magnetic steel bars, wherein at least one magnetic steel bar is provided in each of the plurality of magnetic steel slots;
• wherein the electric motor rotor is rotatably disposed in the stator bore, and the rotor bore is in concentric with the stator bore.