Sine-wave drive and square-wave drive are two common motor control strategies.This study constructs a mathematical model capable of predicting the distribution of electromagnetic force waves in synchronous reluctance ...Sine-wave drive and square-wave drive are two common motor control strategies.This study constructs a mathematical model capable of predicting the distribution of electromagnetic force waves in synchronous reluctance motors(SynRMs)under these two drive methods,and comparatively analyzes the vibration phenomena induced by electromagnetic forces under different drive methods.It aims to provide an effective tool for predicting the distribution of electromagnetic force waves in SynRMs,while exploring the influence of drive modes on their vibration characteristics.The study focuses on a 4-pole,36-slot 5.5 kW SynRM.Based on the magnetomotive force(MMF)-permeance method,incorporating the special rotor structure and the characteristics of current harmonics under square-wave drive,an air-gap flux distribution function is established.Meanwhile,Maxwell’s stress tensor method is adopted to analyze how the air-gap flux density relates to electromagnetic excitation force waves.Subsequently,this analysis is applied to forecast the spatiotemporal distribution features of radial electromagnetic force waves.Finite element simulations are conducted to compute the modal and vibration responses of the SynRM,followed by a comparative analysis of the vibration characteristics under the two drive methods.Additionally,a 6-pole,36-slot SynRM is used for additional comparative verification.Ultimately,the effectiveness of the simulation results is verified through experiments.展开更多
In recent years the synchronous reluctance machines(SynRMs)have received much attention.They have some good features such as high torque density,high reliability and low cost.This paper aims to give an overview of Syn...In recent years the synchronous reluctance machines(SynRMs)have received much attention.They have some good features such as high torque density,high reliability and low cost.This paper aims to give an overview of SynRMs with particular emphasis on the history,research status and industrial application.Besides,concept and basic operating principles of such machines are also described.Moreover,some hot spots of the research on the SynRMs are introduced.Several methods to improve the average torque and reduce torque ripple of the SynRMs in the past literatures are presented including topology design and control strategies.An overview of the methods from different aspects to realize high efficiency for the SynRMs is given which contain rotor optimization,winding configuration,material improvement,control schemes and so on.Some approaches suitable for high speed application are also introduced.It can be seen that the SynRMs have broad development prospects and great potential in industrial application.展开更多
基金supported by the Science and Technology Project of State Grid Corporation of China Headquarters under Grant 5500-202416156A-1-1-ZN.
文摘Sine-wave drive and square-wave drive are two common motor control strategies.This study constructs a mathematical model capable of predicting the distribution of electromagnetic force waves in synchronous reluctance motors(SynRMs)under these two drive methods,and comparatively analyzes the vibration phenomena induced by electromagnetic forces under different drive methods.It aims to provide an effective tool for predicting the distribution of electromagnetic force waves in SynRMs,while exploring the influence of drive modes on their vibration characteristics.The study focuses on a 4-pole,36-slot 5.5 kW SynRM.Based on the magnetomotive force(MMF)-permeance method,incorporating the special rotor structure and the characteristics of current harmonics under square-wave drive,an air-gap flux distribution function is established.Meanwhile,Maxwell’s stress tensor method is adopted to analyze how the air-gap flux density relates to electromagnetic excitation force waves.Subsequently,this analysis is applied to forecast the spatiotemporal distribution features of radial electromagnetic force waves.Finite element simulations are conducted to compute the modal and vibration responses of the SynRM,followed by a comparative analysis of the vibration characteristics under the two drive methods.Additionally,a 6-pole,36-slot SynRM is used for additional comparative verification.Ultimately,the effectiveness of the simulation results is verified through experiments.
基金in part by the National Natural Science Foundation of China (NSFC) under Grant 52107046in part by the Fundamental Research Funds for the Central Universities,HUST (2021XXJS009)
文摘In recent years the synchronous reluctance machines(SynRMs)have received much attention.They have some good features such as high torque density,high reliability and low cost.This paper aims to give an overview of SynRMs with particular emphasis on the history,research status and industrial application.Besides,concept and basic operating principles of such machines are also described.Moreover,some hot spots of the research on the SynRMs are introduced.Several methods to improve the average torque and reduce torque ripple of the SynRMs in the past literatures are presented including topology design and control strategies.An overview of the methods from different aspects to realize high efficiency for the SynRMs is given which contain rotor optimization,winding configuration,material improvement,control schemes and so on.Some approaches suitable for high speed application are also introduced.It can be seen that the SynRMs have broad development prospects and great potential in industrial application.
