To address the fixed air-gap magnetic field of permanent magnet synchronous motors and the inefficiencies of traditional electrically excited motors

a novel parallel dual-rotor hybrid self-excited motor is introduced. Firstly

the proposed motor utilizing the harmonic excitation principle

it allows for flexible control of excitation current by adjusting harmonic voltage

which enhances speed control in medium and high-speed ranges. Secondly

under the premise of ensuring that the power remains unchanged

the proportion of each of the two parts is analyzed

and then the excitation source parameters are optimized and designed. Finally

the performance of the proposed motor is verified by adjusting the magnitude and direction of the excitation current and using the two-dimensional finite element model. The simulation results show that the proposed motor has a good ability to adjust the magnetism

and in the case of weak field

the amplitude of the back electromotive force is close to 0

which can effectively realize the speed adjustment.