scholarly journals Cogging force reduction in linear tubular flux switching permanent-magnet machines

Open Physics ◽  
2018 ◽  
Vol 16 (1) ◽  
pp. 243-248
Author(s):  
Doudou Sarr Lo ◽  
Yacine Amara ◽  
Georges Barakat ◽  
Ferhat Chabour
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Energy Conversion ◽  
Permanent Magnet ◽  
Permanent Magnet Machines ◽  
Free Piston ◽  
Force Reduction ◽  
Element Method

Abstract The aim of this paper is to explore the possibility of using linear tubular flux switching permanent magnet machines in a free piston energy conversion (FPEC) system. In FPEC systems, acceleration and therefore speed are often relatively high, which impose to have a reduced number of poles, meanwhile the cogging force will be relatively high. In order to reduce the cogging force two techniques are combined. The analysis is done using finite element method.

A New Method for Minimizing Cogging Torque in Permanent Magnet Machines Using Genetic Algorithm

2013 ◽  
Vol 690-693 ◽  
pp. 2693-2698
Author(s):  
Jing Shi Shangguan ◽  
Cheng Zhi Fan
Keyword(s):  
Genetic Algorithm ◽  
Finite Element Method ◽  
Finite Element ◽  
Permanent Magnet ◽  
New Method ◽  
Permanent Magnet Machines ◽  
Cogging Torque ◽  
Element Method

Cogging torque is one of the main reasons which cause ripple in motor's speed and torque. So the reduction of cogging torque must be considered in the design of permanent magnet machines. This paper presents a new method for cogging torque minimization by optimizing pole-arcs combined with varying the thickness in magnets. With the combination of different pole-arcs of each PM slice to achieve the minimum cogging torque while without being harmful to the average torque. Thus, optimize the offset value which varies the thickness of magnets to further reduce the amplitude of cogging torque. In this paper, it used genetic algorithm (GA) to optimize pole-arcs and magnet offset on the basis of Finite Element Method (FEM).

Modeling and Analysis of Linear Permanent Magnet Generator for Wave Energy Conversion Using Finite Element Method

2015 ◽  
Vol 785 ◽  
pp. 258-262 ◽  
Author(s):  
Aamir Hussain Memon ◽  
Taib bin Ibrahim ◽  
Perumal Nallagownden
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Energy Conversion ◽  
Permanent Magnet ◽  
Wave Energy ◽  
Wave Energy Conversion ◽  
Modeling And Analysis ◽  
Copper Loss ◽  
Element Method ◽  
Permanent Magnet Generator

This paper presents the design modeling and analysis of linear permanent magnet generator for wave energy conversion using finite element method. The time-stepping finite element technique is used to determine electromagnetic characteristics and analyze the efficiency. The main parts such as; copper loss is analyzed on the different variation of winding input excitation and the core loss is determined based on various specific loss curves data in order to analyze its effect on frequency. The influence of main dimension of stator is analyzed on electromagnetic characteristic and copper loss.

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