White Papers

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  1. [W-MB-155] Accuracy of 6-Phase Motor Plant Models for Detecting Faults at Disconnections

    Multiphase motors have become widely used, and a fail-safe function can be realized by providing a system with redundancy.

  2. [W-MB-152] Accuracy of Motor Plant Model Required for ECU testing

    ECU testing is performed under various conditions from the normal to the abnormal system.

  3. [W-SE-99] High Speed Magnetic Field Analysis with SMP Solver

    The parallel solver is one way to run magnetic field analysis at high speed. JMAG has an SMP-parallel solver that can easily be used with a single click on the computer.

  4. [W-MB-153] Accuracy and Speed Verification of Motor Plant Models Accounting for Spatial Harmonics

    This document uses JMAG-RT, which is a type of plant model, to show the relationship between the resolution and accuracy of each axis (mechanical angle, current amplitude, and cur…

  5. [W-MB-156] Improving Motor Plant Model Accuracy by Accounting for Harmonic Iron Loss

    Because of the acceleration of the motor and the effect of the PWM drive, it is becoming more important to account for loss in order to improve accuracy even for analysis using mo…

  6. [W-MO-12] Comparative Evaluation of Synchronous Impedance of a 2D Model and a 3D Model

    This case study makes the differences clear between 2D and 3D models by comparing the synchronous impedances obtained from the analysis results of 2D and 3D models, and shows that…

  7. [W-SE-101] Detailed Eddy Current Analysis of End Winding with Parallel Processing

    To accurately obtaining the end-winding eddy current loss at high rotation speed, the influence of the magnetic field flux generated by the eddy current flow in every part of the …

  8. [W-MB-66] Accuracy Improvements in the JMAG-RT Induction Machine Model

    In this paper, improvements in the accuracy of induction machine plant models when applied to automobile drive motors are discussed.

  9. [W-MA-88] Improvements in Accuracy of Anomalous Eddy Current Loss Calculations (1)

    In iron loss analysis, conventionally, methods using previously measured iron loss data have been mainly used (hereinafter referred to as conventional methods).

  10. [W-OP-96] Necessity of GA for Multi-Objective Optimization of Drive Motor

    In this paper, the multi-objective optimization calculation has 12 design variables (8 geometric variables, 4 circuit variables) with 6 objective functions (maximize torque, minim…

  11. [W-SE-145] Highly Parallel Solver Performance Evaluation (Induction Heating)

    This document uses as an example an induction heating model to evaluate the performance of the highly parallel solver. As a result, it was found that even in thermal-magnetic fiel…

  12. [W-MO-17] Alternator Analysis Using Tetrahedral/Pentahedral Mixed Mesh

    This paper looks at tetrahedral/pentahedral mixed mesh and aims to generate effective mesh to reduce calculation time. We compared calculation times and accuracy when analysis is …

  13. [W-MB-102] Motor Efficiency Map Evaluation for Model-Based Development (MBD) Using FEA Simulation

    In MBD, it is necessary to evaluate devices characteristics without having to wait for the manufacturing of a prototype.

  14. [W-MA-111] Improvements in Accuracy of Anomalous Eddy Current Loss Calculations (2)

    The iron loss analysis method the most commonly applied uses measured iron loss data (hereinafter referred to as the conventional method). In the conventional method, since the ap…

  15. [W-SE-113] Reduction of Calculation Time Using Equivalent Circuit Model

    In electrical machine design, the use of coupled analysis between the electromagnetic FEA and the motor drive control circuit is necessary in order to have an understanding of the…

  16. [W-SE-75] Iterative Calculations and Convergence Characteristics

    In this report, we will explain the convergence criteria of a local quantity and the improvement of the determination of convergence of ICCG. And then, we describe that these idea…

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