White Papers
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[W-MO-213] Common Mode Voltage and Bearing Current Analysis of Permanent Magnet Synchronous Motors
This case study simulates high-frequency pathways accounting for parasitic components of each part via an equivalent circuit and evaluates the high-frequency phenomenon of a perma…
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[W-VI-192] Proposal for System-level Noise/Vibration Design Process Using Transfer Functions
This paper proposes a new system-level noise and vibration design process that takes advantage of transfer functions to realize designs that account for the magnetic characteristi…
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[W-SC-215] Quench Analysis of a High-Temperature Superconducting Coil
This paper introduces a simulation to comprehensively analyze the physical phenomenon during a quench event. The case study analyzes a no-insulation pancake coil that uses Rare-ea…
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[W-SC-214] High-temperature Superconductor Analysis Accounting for Anisotropy
This paper examines the need to account for anisotropy in electromagnetic field simulations through the analysis of the CORC cable presented in Fig. 1. This case study evaluates t…
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[W-MU-204] Thermal Analysis Validation with Measurements for a Water-Cooled PMSM
To solve this problem, this paper adopts a method that combines the Finite Element Analysis (FEA) and a thermal equivalent circuit.
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[W-MA-195] Influence of Symmetric BH Loop Fluctuations on Hysteresis Loss by Play Model
In this paper, we clarify the influence mechanism from fluctuations of the symmetric BH loops to a resulting minor loop and estimate errors caused by the fluctuations.
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[W-MA-196] Modeling of Excess Loss for Arbitrary Magnetic Flux Density Waveforms
Building upon the Bertotti model, this paper proposes a new modeling technique. More precisely, this approach is grounded in the power of the time derivative of the magnetic flux …
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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.
