Vibration And Noise Analysis And Structural Optimization Design Of Switched Reluctance Motor

Switched Reluctance Motor(SRM or SR motor)is a speed-regulating motor with simple structure,firmness and reliability,good speed regulation performance and high control flexibility,which makes SRM have a very broad market prospect.However,the SRM structure has the characteristic of double salient poles.When the motor is running,the pulse current is passed into the stator winding,which produces a large torque ripple.At the same time,the motor relies on the magnetic pulling force to attract the rotor to rotate,which generates radial magnetic pulling force while generating tangential magnetic pulling force.The appearance of radial magnetic pull will cause obvious vibration and noise when the SRM is running,and this problem has become the fatal flaw of the SRM.Aiming at the problem of vibration and noise of switched reluctance motor,this paper takes 8/6-pole SRM as the research object,firstly analyzes the structural characteristics and operation principle of the motor,establishes a simulation model on this basis,and conducts an in-depth analysis of its vibration and noise problem Research.Firstly,the structure and operation principle of SRM are analyzed,and a switched reluctance motor with 8/6 structure is designed according to the motor design method and requirements,and the structural parameters of the motor are determined,which provides a model basis and model for the subsequent analysis of the vibration noise of the motor.theoretical basis.Secondly,the radial electromagnetic force acting on the inner surface of the stator teeth is calculated by Maxwell,and the data information of its amplitude,order and frequency is obtained after Fourier decomposition of the radial electromagnetic force.The three-dimensional model of the stator core was established by ANSYS Workbench software,and the modal simulation analysis of the motor stator structure was completed,and the modal mode shape and modal frequency characteristics of the first six main modes were obtained.The results can be used for the resonance of the motor.Make valid estimates.Finally,based on the Harmonic Response environment,the SRM vibration and noise analysis model is built,and the vibration and acoustic analysis is carried out to study its vibration and noise characteristics.At the same time,the influence of polar arc coefficient and air gap length on radial electromagnetic force is analyzed.Based on this conclusion,a parameter combination optimization method is proposed to reduce radial electromagnetic force.The results show that the method can effectively improve the vibration characteristics of the switched reluctance motor.