scholarly journals FEM Analysis of a New Electromechanical Converter with Rolling Rotor and Axial Air-Gap

2015 ◽  
Vol 15 (4) ◽  
pp. 69-74 ◽  
Author(s):  
C. UNGUREANU ◽  
A. GRAUR
Keyword(s):  
Fem Analysis ◽  
Air Gap ◽  
Rolling Rotor ◽  
Electromechanical Converter

scholarly journals ELECTROMAGNETIC DESIGN AND FEM ANALYSIS OF A NOVEL DUAL-AIR-GAP RELUCTANCE MACHINE

2013 ◽  
Vol 140 ◽  
pp. 523-544 ◽  
Author(s):  
Chockalingam Aravind Vaithilingam ◽  
Norhisam Bin Misron ◽  
Ishak Aris ◽  
Mohammad Hamiruce Marhaban ◽  
Masami Nirei
Keyword(s):  
Fem Analysis ◽  
Air Gap ◽  
Electromagnetic Design ◽  
Reluctance Machine

Special air-gap element for 2-D FEM analysis of electrical Machines accounting for rotor skew

2005 ◽  
Vol 41 (5) ◽  
pp. 2020-2023 ◽  
Author(s):  
G.D. Kalokiris ◽  
T.D. Kefalas ◽  
A.G. Kladas ◽  
J.A. Tegopoulos
Keyword(s):  
Fem Analysis ◽  
Air Gap ◽  
Electrical Machines ◽  
Gap Element

scholarly journals Permanently split capacitor motor-study of the design parameters

2017 ◽  
Vol 68 (5) ◽  
pp. 339-348
Author(s):  
Vasilija Sarac ◽  
Goce Stefanov
Keyword(s):  
Flux Density ◽  
Analytical Model ◽  
Fem Analysis ◽  
Optimization Method ◽  
Air Gap ◽  
Analytical Models ◽  
Design Parameters ◽  
Magnetic Flux Density ◽  
Split Capacitor ◽  
Motor Model

Abstract Paper analyzes the influence of various design parameters on torque of permanently split capacitor motor. Motor analytical model is derived and it is used for calculating the performance characteristics of basic motor model. The acquired analytical model is applied in optimization software that uses genetic algorithms (GA) as an optimization method. Optimized motor model with increased torque is derived by varying three motor parameters in GA program: winding turns ratio, average air gap flux density and motor stack length. Increase of torque has been achieved for nominal operation but also at motor starting. Accuracy of the derived models is verified by Simulink. The acquired values of several motor parameters from transient characteristics of Simulink models are compared with the corresponding values obtained from analytical models of both motors, basic and optimized. Numerical analysis, based on finite element method (FEM), is also performed for both motor models. As a result of the FEM analysis, magnetic flux density in motor cross-section is calculated and adequate conclusions are derived in relation to core saturation and air gap flux density in both motor models.

Modeling and Simulation of Moving Iron Linear Generator (MILG)

2011 ◽  
Vol 110-116 ◽  
pp. 2464-2468 ◽  
Author(s):  
Imran Fazal ◽  
Mohd Noh Karsiti ◽  
K.S. Rama Rao ◽  
Saiful Azrin Zulkifli
Keyword(s):  
Modeling And Simulation ◽  
Permanent Magnet ◽  
Flux Density ◽  
Impact Force ◽  
Control Strategies ◽  
Fem Analysis ◽  
Air Gap ◽  
Direct Impact ◽  
Linear Generator ◽  
Peak Value

Moving permanent magnet linear generator has some limitations such as thermal and impact force demagnetization, and complex control strategies. To overcome these limitations one of the solution is moving iron linear generators. This paper presents the analysis of flux using FEM for moving iron linear generator. The flux density varies with peak value of 0.85 for 6/1, 0.98 for 6/2 and 1.27 for 6/4 MILGs with the movement of translator. The effect of air gap on different MILGs is studied. The FEM analysis indicates that air gap have direct impact on output of the generator. The analysis is performed to replace the moving permanent magnet by moving iron in a different applications.

scholarly journals Force Characterization and Optimization of the Bottom-Driven Type and Side-Driven Type Rotary Motion Electrostatic Actuator using FEM

2019 ◽  
Vol 8 (12S2) ◽  
pp. 470-475
Keyword(s):  
Finite Element Method ◽  
Thrust Force ◽  
Fem Analysis ◽  
Air Gap ◽  
Rotary Motion ◽  
Electrostatic Actuator ◽  
Type B ◽  
Force Analysis ◽  
Linear Type ◽  
Electrostatic Actuators

Three types of rotary motion electrostatic actuator were designed and analyzed using Finite Element Method (FEM) analysis. This paper will discuss the comparisons and detailed thrust force analysis of three types of the electrostatic actuator designs which are side-driven rotary electrostatic actuators, bottom-driven rotary electrostatic actuator (linear), and bottomdriven rotary electrostatic actuator (skewed). There are several similar parameters will be constant for the three types of rotary motion electrostatic actuator such as the number of pole of electrodes of rotor and stator, thickness of the rotor and stator, and air gap between the rotor and stator. The three designs that designed by the Ansys Maxwell 3D and analyze the force generated by the designs. There are several parameters that are varying: (I) the actuator thickness ;(ii) air gap between rotor and stator. In this paper, three types of designs for the rotary electrostatic actuator are discussed; i.e. (a) Bottom-driven (linear type), (b) bottom-driven (skewed type); and (c) Side-driven. From this research it was concluded that the bottom-driven (skewed type) actuator will produce the largest force compared to other actuator which is 5.95808mN.

scholarly journals A Simple Analytical Model of Static Eccentricity for PM Brushless Motors and Validation through FEM Analysis

Energies ◽  
2020 ◽  
Vol 13 (13) ◽  
pp. 3420
Author(s):  
Andrea Del Pizzo ◽  
Luigi Pio Di Noia ◽  
Emanuele Fedele
Keyword(s):  
Analytical Model ◽  
Permanent Magnets ◽  
Fem Analysis ◽  
Approximate Expression ◽  
Air Gap ◽  
Operating Conditions ◽  
Simple Analytical Model ◽  
Element Analysis ◽  
Frequency Spectra ◽  
Static Eccentricity

The paper firstly summarizes a simple analytical model of the air gap flux-density distribution for isotropic permanent magnet (PM) synchronous machines, in the presence of static eccentricity. The model was proposed by the authors in a previous paper and is based on an efficacious analytical expression of the variable length of air gap magnetic field lines which occur in eccentric brushless machines with surface-mounted permanent magnets. The approximate expression of the air gap field makes it possible to achieve a mathematical model with concentrated parameters close to that of a PM machine without eccentricity. The expression of the armature voltages and electromagnetic torque are found, also with reference to steady-state operating conditions at fixed rotor speed and impressed currents. The differences introduced by the considered type of eccentricity are evaluated and highlighted especially with reference to the air gap inductance and to waveforms and frequency spectra of voltages and shaft torque. Numerical results in a case-study of an 8-pole, 110 kW PM motor are compared to those obtained by using finite element analysis.

A novel analytical calculation of magnetic field in the slotted air gap of spoke-type permanent-magnet machines using conformal mapping

2020 ◽  
pp. 1-15
Author(s):  
Jianqi Li ◽  
Yu Zhou ◽  
Jianying Li
Keyword(s):  
Magnetic Field ◽  
Conformal Mapping ◽  
Permanent Magnet ◽  
Flux Density ◽  
Analytical Method ◽  
Electromotive Force ◽  
Analytical Calculation ◽  
Air Gap ◽  
Permanent Magnet Machines ◽  
Peak Value

This paper presented a novel analytical method for calculating magnetic field in the slotted air gap of spoke-type permanent-magnet machines using conformal mapping. Firstly, flux density without slots and complex relative air-gap permeance of slotted air gap are derived from conformal transformation separately. Secondly, they are combined in order to obtain normalized flux density taking account into the slots effect. The finite element (FE) results confirmed the validity of the analytical method for predicting magnetic field and back electromotive force (BEMF) in the slotted air gap of spoke-type permanent-magnet machines. In comparison with FE result, the analytical solution yields higher peak value of cogging torque.

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