The constant power speed regulation interval of the traditional induction motor (IM) is limited, the outside rated point efficiency is reduced, and the use of the traditional motor is constrained by the use scene. In order to broaden the speed regulation and highefficiency working range and adapt to the operation requirements of various environments, a stator squirrel cage twelvephase IM is used to replace the traditional distributed winding three-phase IM. Through the rotor fieldoriented vector control, the harmonic currents of different planes are decoupled to drive the motor to rotate, the harmonic currents of all planes are regulated through the control function, which can easily and quickly switch the number of pole pairs of the motor. The proposed method of the controlling the vector decoupling plane of the control function to achieve pole pair switching is simulated and verified. The simulation results show that the proposed pole pair switching technology can realize the pole pair switching of twelvephase IM at different speeds. The speed adjustment range is widened to meet the highefficiency operation under different working conditions.