White Papers
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[W-OP-165] Solving Geometry Conflicts in GA Optimizations with Large Numbers of Geometric Parameters
Genetic Algorithm (GA) based optimization with finite element analysis is expected to become a solution for high performance motor designs which need to satisfy many strict requir…
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[W-MB-181] Validation of JMAG-RT Spatial Harmonic Model Accuracy: Comparison of Differential Equation Models, Integral Method Models, and FEA
JMAG-RT generates models that can simulate nonlinear motor characteristics for use in control circuit designs done with software-in-the-loop (SIL), hardware-in-the-loop (HIL), and…
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[W-MA-49] Necessity and Approach of Stray Load Loss Analysis
The main components of loss depend on the operating point. One of these components is stray load loss.
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[W-SE-94] Improving Automatic Mesh Generation Speed for 3D Solid Models
Magnetic field simulation tends to be run as a large-scale analysis lately, being backed by the remarkable performance improvement of the computer. JMAG features a high-performanc…
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[W-VI-97] Correlation Analysis for Matching Stiffness between Actual Machine and Analysis Model
If vibration can be estimated with high accuracy, the cost of prototype and testing can be reduced, and thus the reduction of the overall product development time is achievable.
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[W-SE-95] Improvement in Generation of Three-Dimensional Skin Mesh
We have improved the reliability of skin mesh generation for JMAG-Designer in this work, and thus, its details are introduced in this paper.
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[W-MA-76] Material Modeling Method for Electromagnetic Field/Iron Loss Analyses Considering Residual Strain
This paper proposes an electromagnetic field analysis and iron loss analysis based on the assumption that the effect of punching can be expressed as a function of the distance fro…
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[W-MO-114] Comparison of Efficiency Map with Measurement
This document compares an efficiency map obtained with simulations with an efficiency map consisting of actual measurements, achieving an error of 1% or less for entire regions.
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[W-SE-98] Improved Durability for Automatic Mesh Generation
This white paper assesses the durability of JMAG's automatic mesh generation feature.
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[W-MA-67] On the Geometry Edge Effects in Laminated Steel Sheet Eddy Current Loss Analysis
In this white paper, based on the results of this analysis, the scenarios where the 2D + 1D method degrades accuracy are made clear and issues to be addressed in the future are pr…
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[W-OP-119] Global Design Search of Multi-Objective Multi-Constraint Optimization Issues by Narrowing Down Design Spaces
This document shows a reduction in calculation costs by narrowing down the design space as an optimization calculation pre-process using PM motor optimization issues as an example…
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[W-MA-100] Introducing the Detailed Analysis Method for Electromagnetic Steel Sheet for High-Precision Loss-Assessment
Here, we use a simple example and consider the significance of taking into account the eddy currents and magnetic hysteresis during magnetic field analysis.
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[W-OP-166] Sensitivity Study of Configuration of Large Scale Multi-Objective Optimization of a PMSM
The feasible solution space of large scale multi-objective optimization schemes is sensitive to the configuration (population size, objectives, constraints, and design variables).
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[W-MB-167] Motor Plant Model Considering AC Loss for Control Calibration
Control parameter calibrations on Model-In-the-Loop Simulation (MILS) with Finite Element Analysis (FEA) based motor models is expected to be a standard procedure in the Model-Bas…
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[W-MO-164] Investigation in the Accuracy of FEA Based Efficiency Maps for PMSM Traction Machines
In this report, three methods are compared on a PMSM showing that the accurate version is necessary for advanced applications such as EV. It shows that the accurate version based …
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[W-MB-157] Evaluation of the Effect of Resolver Eccentricity on PM Motor Torque Ripple Control
VR-type resolvers are widely used as angle sensors to control the rotation of traction motors for electric vehicles and hybrid vehicles.
