Excitation Current on the Influence of Radial Electromagnetic Waves of Tangential Magnetizing Parallel Structure Hybrid Excitation Synchronous Motor

To study the effect of different excitation current on the radial electromagnetic wave of tangential magnetizing parallel structure hybrid excitation synchronous motor (TMPS-HESM) under no-load and the armature reaction conditions, this paper introduces the basic structure of the motor and the rotor magnetic circuit model by means of the finite element analysis method according to the principle of electrical machinery. The analytical model of the amplitude, frequency and order of the radial electromagnetic force wave of the motor is derived by using the Maxwell stress tensor method considering the change of the excitation current, and the force wave component which has great influence on the electromagnetic vibration of the motor is qualitatively selected as the focus of analysis. The variation rule of radial electromagnetic force wave under different excitation current and no-load is calculated. The radial electromagnetic force wave component which is greatly affected by the excitation current change is discussed and the reason is analyzed, which provides a theoretical basis for further suppressing the electromagnetic vibration of this kind of hybrid excitation motor.