Study on Line-Start Permanent Magnet Assistance Synchronous Reluctance Motor for Improving Efficiency and Power Factor

Abstract

In order to improve the efficiency, a line-start synchronous reluctance motor (LS-SynRM) is studied as an alternative to an induction motor (IM). However, because of the saliency characteristic of SynRM, LS-SynRM have a limited power factor. Therefore, to improve the efficiency and power factor of electric motors, we propose a line-start permanent magnet assistance synchronous reluctance motor (LS-PMA-SynRM) with permanent magnets inserted into LS-SynRM. IM and LS-SynRM are selected as reference models, whose performances are analyzed and compared with that of LS-PMA-SynRM using a finite element analysis. The performance of LS-PMA-SynRM is analyzed considering the position and length of its permanent magnet, as well as its manufacture. The final model of LS-PMA-SynRM is designed for improving the efficiency and power factor of electric motors compared with LS-SynRM. To verify the finite element analysis (FEA) result, the final model is manufactured, experiments are conducted, and the performance of LS-PMA-SynRM is verified.

Design of PMaSynRM for Flywheel Energy Storage System in Smart Grids

“…Another type of IM is the squirrel-cage induction motor (SCIM). When the SCIM compared with PMaSynRM, it is seen that PMaSynRM has less losses and higher efficiency [23][24][25]. In a study, PMSM and PMaSynRM were compared.…”

Critical Aspects of Electric Motor Drive Controllers and Mitigation of Torque Ripple—Review

“…Mitigate this problem, lowcost ferrite is suitable, but it has low energy and coercivity. In [19,20] new topology PM assisted, spoke, axial and Inwheel motors are proposed as the performance. This review discusses low-cost PMSM material and PM topology.…”

Voltage Harmonic Impacts on Electric Motors: A Comparison between IE2, IE3 and IE4 Induction Motor Classes

“…Induction motors comparison [2,3,16,[18][19][20]22,25,34,35,37,38] Harmonics impacts on induction motors [5,6,22,[34][35][36]39-44] Harmonics presence and diagnosis in power systems [11,12,44] Fault diagnosis in induction motors [10,13,14] Economic substitution studies [16,23] Line start permanent magnet motor (LSPMM) [5,17,18,21,22,[24][25][26][27][28]31,32,43,[45][46][47][48][49][50][51] Temperature increase due to harmonics [3,5,[34]…”

“…An analysis of the technical and economic benefits of substitution between these technologies has been presented in [2,3,[16][17][18][19][20][21][22][23]. In addition, the studies in [17,18,21,22,[24][25][26][27][28][29][30][31][32] include the main constructive characteristics, weaknesses and strengths related to the LSPMM. In [16], an in-field replacement example of a squirrel-cage induction motor by a line start permanent magnet motor (LSPMM) is presented.…”