Motor rotor and motor

A motor, comprising:

• a stator;
• and
• a motor rotor, comprising:
• a rotor iron core;
• and
• a plurality of permanent magnets disposed on the rotor iron core, wherein at least some permanent magnets of the plurality of permanent magnets comprise concentrations of rare earth metallic elements continuously gradiently distributed or gradiently distributed in a multi-stage manner from a middle to both ends in a first trend along at least one direction perpendicular to a magnetization direction;
• wherein the concentrations of rare earth metallic elements result in coercive forces of the at least some permanent magnets of the plurality of permanent magnets in a second trend along the at least one direction perpendicular to the magnetization direction, wherein the second trend proportionally corresponds to the first trend;
• and
• wherein the concentrations of rare earth metallic elements result in magnetic forces of the at least some permanent magnets of the plurality of permanent magnets in a third trend along the at least one direction perpendicular to the magnetization direction, wherein the third trend proportionally corresponds to the first trend.