Optimal rotor structure design of claw-pole alternator for performance improving using static 3D FEM coupled-circuit model

2016 ◽  
Author(s):  
Huai-Cong Liu ◽  
Geochul Jeong ◽  
Sang-hwan Ham ◽  
Ju Lee
Keyword(s):  
Structure Design ◽  
Circuit Model ◽  
3D Fem ◽  
Rotor Structure

A nonlinear magnetic circuit model for periodic eddy current problems using T,ϕ-ϕ formulation

2017 ◽  
Vol 36 (3) ◽  
pp. 649-664 ◽  
Author(s):  
Rene Plasser ◽  
Gergely Koczka ◽  
Oszkár Bíró
Keyword(s):  
Eddy Current ◽  
Magnetic Circuit ◽  
Iteration Process ◽  
Equation System ◽  
Circuit Model ◽  
Computational Time ◽  
Combined Method ◽  
3D Fem ◽  
Content Type ◽  
Transformer Model

Purpose A transformer model is used as a benchmark for testing various methods to solve 3D nonlinear periodic eddy current problems. This paper aims to set up a nonlinear magnetic circuit problem to assess the solving procedure of the nonlinear equation system for determining the influence of various special techniques on the convergence of nonlinear iterations and hence the computational time. Design/methodology/approach Using the T,ϕ-ϕ formulation and the harmonic balance fixed-point approach, two techniques are investigated: the so-called “separate method” and the “combined method” for solving the equation system. When using the finite element method (FEM), the elapsed time for solving a problem is dominated by the conjugate gradient (CG) iteration process. The motivation for treating the equations of the voltage excitations separately from the rest of the equation system is to achieve a better-conditioned matrix system to determine the field quantities and hence a faster convergence of the CG process. Findings In fact, both methods are suitable for nonlinear computation, and for comparing the final results, the methods are equally good. Applying the combined method, the number of iterations to be executed to achieve a meaningful result is considerably less than using the separated method. Originality/value To facilitate a quick analysis, a simplified magnetic circuit model of the 3D problem was generated to assess how the different ways of solutions will affect the full 3D solving process. This investigation of a simple magnetic circuit problem to evaluate the benefits of computational methods provides the basis for considering this formulation in a 3D-FEM code for further investigation.

scholarly journals Numerical Optimization Simulation of Synchronous Four-Wing Rotor

Materials ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 5353
Author(s):  
Kongshuo Wang ◽  
Haichao Liu ◽  
Tianhao Chang ◽  
Deshang Han ◽  
Yiren Pan ◽  
...  
Keyword(s):  
Parametric Design ◽  
Fitness Function ◽  
Pso Algorithm ◽  
Practical Experience ◽  
Structure Design ◽  
Before And After ◽  
Optimization Simulation ◽  
Distribution Index ◽  
New Ideas ◽  
Rotor Structure

The mixer is the most widely used batch mixing equipment in the rubber industry. The rotor is a core component and has a great impact on the mixing effect of the equipment. The current rotor structure design is done empirically, being tightly dependent on practical experience. This paper proposes a method for optimizing the rotor structure by using optimization algorithms combined with numerical simulation technology. Using MATLAB software, a parametric design program for synchronous rotors and a set of optimization programs for the particle swarm optimization (PSO) algorithm were written. The global distribution index was used as the fitness function to optimize the synchronous rotor configuration. A comparative analysis of the rotors before and after optimization shows that the optimization process is feasible, and the results are reliable. This provides new ideas for the design and development of mixer rotors.

scholarly journals Experimental design for an enhanced parametric modeling of supercapacitor equivalent circuit model

2021 ◽  
Vol 23 (1) ◽  
pp. 63
Author(s):  
Ali Mohsen Alsabari ◽  
M. K Hassan ◽  
Azura CS ◽  
Ribhan Zafira
Keyword(s):  
Experimental Design ◽  
Equivalent Circuit ◽  
Equivalent Circuit Model ◽  
Structure Design ◽  
Parametric Modeling ◽  
Circuit Model ◽  
Maximum Relative Error ◽  
Internal Parameters ◽  
Terminal Voltage ◽  
Real Challenge

The modelling of the supercapacitor (SC) plays an important role for the industrial application with many model representations such as electrical, chemical, and electrochemical models. Among one of those models are the equivalent circuit model which has been used to describe the real-time (charging/discharging) operation characteristics of the SC. Apart of its mathematical complexity, the time-consuming experimentally is also a real challenge for obtaining the internal parameters values for the SC. Choices of test equipment with a structure design of experiment also play important criteria affect the accuracy of the model. This research emphasis on a structured of experimental design for SC modelling by using Neware battery tester. The experimental exercise to attain internal parameters of the SC are described and discussed in the paper. The findings were benchmarked with an empirical model of previous researchers. The terminal voltage of SC was validated via experiment with maximum relative error of 0.045%. The model successfully reproduce the SC dynamic behavior during the charge/discharge phase which indicates the proposed method and model accuracy.

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