Coaxial birotor permanent magnet DC motor

The utility model discloses a coaxial birotor permanent magnet DC motor belonging to the technical field of motors. The motor comprises a housing 6, a left end cover 14, a right end cover 4, a left end bearing 13, a right end bearing 5 and a motor shaft 2, wherein more than two pairs of permanent magnets 10 arranged in a polarity staggered way are fixed on the outer cylindrical surface of the motor shaft 2; a squirrel cage auxiliary rotor formed by a squirrel cage frame 11 and squirrel cage bars 8 is sleeved on the outer cylindrical surfaces of the permanent magnets 10; and a stator assembly formed by a stator core 12 and a stator winding 7 arranged on the stator core is fixedly mounted on the inner wall of the housing 6. The motor provided by the utility model has high energy conversion efficiency, can improve motor power under the condition that the volumes are identical, and can be widely applied in high power electric appliances as electric cars, electro-tricycles and the like.