External stator magnetic pole parallel type hybrid excitation composite motor

The invention provides an external stator magnetic pole parallel type hybrid excitation composite motor which relates to the technical field of hybrid excitation composite motors, with the object of solving the problem of small output torque of conventional hybrid excitation motors. In the motor, excitation windings are wound onto the iron core of an excitation external stator to make the motor free of brushes. The excitation windings are in a certain form of series connection to ensure that during direct current charging, the right hand rule is obeyed. The direction of the excitation flux linkage is corresponding to a permanent magnet magnetizing direction; by changing the direction of excitation current, the motor is made to work in a magnetism increased or a magnetism weakened state. By changing the direct current in excitation coils, the magnetic field of the motor can be widely adjusted. In addition to that, the motor enables the armature winding induction potential to be adjusted by adjusting the excitation current and can offset the magnetic field produced by a permanent magnet part through the adjustment of excitation current when the armature winding malfunctions for short circuit, therefore realizing high efficient demagnetization when the armature winding of a motor breaks down for short circuit.