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Permanent Magnet Assisted Synchronous Reluctance Motor with asymmetric rotor for High Torque Performance

CES Transactions on Electrical Machines and Systems 2023年第2期7卷 179-186页

作者： Chengwu Diao Wenliang Zhao Yan Liu Xiuhe Wang the School of Electrical Engineering Shandong UniversityJinan250061China IEEE the China Aviation Control System Research Institute Wuxi214000China

Permanent magnet assisted synchronous reluctance motor(PMA-SynRM)is a kind of high torque density energy conversion device widely used in modern *** this paper,based on the basic topology of PMA-SynRM,a novel PMA-SynRM of asymmetric rotor with position-biased magnet is *** asymmetric rotor design with position-biased magnet realizes the concentration of magnetic field lines in the motor air gap to obtain higher electromagnetic torque,and makes both of magnetic and reluctance torque obtain the peak value at the same current phase *** asymmetric rotor configuration is theoretically illustrated by space vector diagram,and the feasibility of high torque performance of the motor is *** the finite element simulation,the effect of the side barrier on output torque and the Mises stress under the rotor asymmetrical design are *** the motor characteristics including airgap flux density,back EMF,magnetic torque,reluctance torque,torque ripple,losses,and efficiency are calculated for both the basic and proposed *** results show that the proposed PMA-SynRM has higher torque and efficiency than the basic ***,the torque ripple of the proposed PMA-SynRM is reduced by the method with harmonic current injection,and the torque characteristics in the whole current cycle are ***,the endurance to avoid PM demagnetization is confirmed based on the PM remanence calculation.

关键词： Permanent magnet assisted synchronous reluctance motor asymmetric rotor Magnetic torque Reluctance torque Torque ripple

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Dynamic Behavior of a Brushless in Runner Motor

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World Journal of Mechanics 2023年第4期13卷 93-105页

作者： Tièba Ouattara Moussa Magara Traoré Département de Génie Mécanique Energétique et Mines Ecole Normale d’Enseignement Technique et Professionnel (ENETP) Bamako République du Mali

In this article, a model of a rotor with an asymmetric disk is presented in order to represent Campbell’s diagrams and instability maps as a function of the rotations of the support which can significantly change the dynamic behavior of the rotor. Critical rotating speeds can also lead to unacceptable levels of vibration. Indeed, the critical speeds are a function of the dynamic rigidity of the rotating systems and the presence of the gyroscopic forces creates a dependence between the rotating speed of rotation and the natural frequencies to such structures (the CAMPBELL diagrams): this implies that the correct determination of the critical speeds is one of the essential elements when sizing such dynamic systems.

关键词： rotor Dynamics asymmetric rotor Parametric Excitation Finite Element Method Unbalance Response

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