scholarly journals Analysis and Verification of a Cogging Torque Reduction Method for Variable Flux Memory Permanent Magnet Machine

Electronics ◽  
2021 ◽  
Vol 10 (16) ◽  
pp. 1913
Author(s):  
Yingjie Cui ◽  
Fei Zhang ◽  
Lei Huang ◽  
Zhongxian Chen
Keyword(s):  
Simulation Model ◽  
Permanent Magnet ◽  
Analytical Method ◽  
Reduction Method ◽  
Experimental Results ◽  
Load Force ◽  
Theory Analysis ◽  
Cogging Torque ◽  
Variable Flux ◽  
Slot Structure

In this paper, an analytical method based on the series transform and skewed slot structure of rotor is adopted to reduce the cogging torque of the variable flux memory permanent magnet (VFMPM) machine. Firstly, the theory analysis of the cogging torque of the VFMPM machine was completed. Secondly, a simulation model of the VFMPM machine was established, aiming at calculating the cogging torque of the VFMPM machine and verifying the correctness of the above analytical method. Thirdly, a prototype of 14 rotor slots and 12 stator slots of the VFMPM machine was manufactured, and the experimental results of the cogging torque of the VFMPM machine further verified the effectiveness of the above mentioned theory analysis. Besides, the load force of the VFMPM machine including the cogging torque was also tested and analyzed in this paper.

A Novel Cogging Torque Reduction Method for Interior-Type Permanent-Magnet Motor

2009 ◽  
Vol 45 (1) ◽  
pp. 161-167 ◽  
Author(s):  
Gyu-Hong Kang ◽  
Young-Dae Son ◽  
Gyu-Tak Kim ◽  
Jin Hur
Keyword(s):  
Permanent Magnet ◽  
Reduction Method ◽  
Permanent Magnet Motor ◽  
Cogging Torque

scholarly journals Design and fault tolerant analysis of five-phase permanent magnet synchronous motor

2019 ◽  
Vol 16 (3) ◽  
pp. 1115
Author(s):  
Ahmad Sofian Saari Saari ◽  
Dahaman Ishak
Keyword(s):  
Permanent Magnet ◽  
Analytical Method ◽  
Electric Propulsion ◽  
Fault Tolerant ◽  
Permanent Magnet Synchronous Motor ◽  
Synchronous Motor ◽  
Magnetic Flux Density ◽  
Element Analysis ◽  
Acceptable Error ◽  
Cogging Torque

<span lang="EN-IN">This paper presents a design of 15-slot/12-pole, five-phase, surface-mounted permanent magnet synchronous motor (PMSM).  The five-phase PMSM can be an attractive solution to few applications that demand fault tolerant capability such as in aerospace engineering and electric propulsion. The motor model is first investigated based on the implementation of analytical method. The analytical method derived from the subdomain model of the permanent magnet machine is initially applied to estimate the magnetic flux density distributions for the radial component <em>B</em><sub>r</sub> and the tangential component <em>B</em><sub>t</sub> in the machine air gap. Other important motor characteristics such as phase back-EMF, line back-EMF, cogging torque and electromagnetic torque are also calculated. The analytically calculated results are then compared with the numerical method in a 2D finite element analysis. Additionally, the capability of this PMSM model against faulty conditions are further investigated. The results show that the analytical model of the 15-slot/12-pole, five-phase PMSM provides very accurate motor performance within acceptable error margin. For instance, the average electromagnetic torques, inclusive of the cogging torque, as computed by the analytical and numerical methods are 5.53Nm and 5.33Nm respectively, yielding an error of 3.6%. During faulty conditions, the PMSM can possibly continue to operate with lower output torque, about 60% to 80% of its rated torque, when one-phase or two phase windings are out of service.</span>

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