Rotor structure of built-in permanent magnetic brushless motor

This invention discloses a rotor structure of a built-in permanent magnetic brushless motor including a stator composing a winding slot winded by coils on silicon-steel stacked plates, a rotor including several dead tanks having magnetite a bit smaller than the tanks to form a gap between the dead tank and the magnetite in the radial outer edge. The advantage is that the permanent magnetite is only necessary to be processed to long rectangle and the motor rotor is still in the ordinary column.