Control method of synchronous motor applied to dragging

The invention discloses a control method of a synchronous motor applied to dragging, the number of stator magnetic poles of a motor body is equal to that of rotor magnetic poles, and all the stator magnetic poles drive the corresponding rotor magnetic poles to do work in the operation process; each stator magnetic pole comprises at least two stator teeth; the magnetic flux of each stator magnetic pole is jointly formed by at least two phases of exciting current, and the position of the stator magnetic pole on the inner side face of the stator and the magnetic induction intensity of the stator magnetic pole are jointly determined by the phase and instantaneous amplitude of each phase of exciting current. In the operation process of the synchronous motor, all the stator inner side faces and all the rotor magnetic poles work at the same time, the stator magnetic poles and the rotor magnetic poles keep the maximum torque power angle all the time, the torque density and the power density of the synchronous motor c