Radial magnetic field modulating brushless double-rotor motor

The invention discloses an axial magnetic field modulated brushless double rotor motor, belonging to the motor field and solving the problems that the operating efficiency is lowered and the reliability is reduced because the winding rotation in a double rotor motor introduces the current through an electric brush and a slip ring, and the components, such as electric brushes and the like need to be maintained. The two stators of the invention are fixed the left end and the right end of a shell; a modulated ring rotor is positioned between the two stators and outside a permanent magnet rotor; a prime motor drives the permanent magnet rotor to rotate to form a 2n pole magnetic field; the stator is electrified to form a 2p pole magnetic field; the 2n pole magnetic field and the 2p pole magnetic field are modulated by the modulated ring rotor; q magnetic-conducting pieces and q insulated pieces are arranged on the end surface at the two sides of a stator frame of the modulated ring rotor along the peripheral direction in an interlacing manner; the relational expression that p is equal to the absolute value of the sum of hn and kq is satisfied, which is given to the load by the output shaft of the modulated ring rotor in different rotating speed; and the axial magnetic field modulated brushless double rotor motor of the motor of the invention has two structures, one structure is in axial symmetrical type, and the other structure is in axial unilateral type. The motor of the invention is used for the occasions of electric automobiles, wind power generation and torpedo drive.