Automotive Engineering Exposition 2019 Yokohama

We have found ourselves in the midst of rapid preparations for the Automotive Engineering Exposition 2019 YOKOHAMA which is coming soon. Here we will introduce one panel to be displayed from the contents of the JMAG booth.

At the JMAG booth, we will present topics on analysis technology and examples, focusing on model-based design and development of motors on a large number of documents.

We look forward to the participation of everyone on the day of the event.

Main Exhibit

That which is required of a motor, the key component in motorization, is not only high performance but also a high level of integration within the system.
Model-based development using simulation is becoming indispensable for motor development as well.
JMAG, with a high track record in motor design, proposes a new workflow for model-based development.
In addition, related to this, we will present analysis technology and examples culled from many documents.

Model-Based Development

For electric vehicles the efficiency of the drive motor is directly linked to the fuel consumption of the vehicle. Therefore it is important to evaluate efficiency maps using high-accuracy motor models and control models.
A workflow is proposed for automatically and rapidly generating and verifying detailed efficiency maps for 3D motor models using JMAG electromagnetic field analysis software.


An example of rotor geometry design using topology optimization will be presented. The objective functions used were for torque (maximized) and torque ripple (minimized), from which multi-objective optimization was performed. By parameterizing the materials in the design space using the ON/OFF method, it is possible to find complex goemetries that cannot be found by conventional parameter optimization.


In order to realize miniaturization and energy savings in devices, the demand for high efficiency and miniaturization of motors is increasing.
In order to meet this demand, the need for loss analysis is increasing and JMAG is continually developing technology to evaluate various losses including iron loss, harmonic loss from a PWM carrier, magnet eddy current loss, AC copper loss, stray load loss, excess eddy current loss, etc.
We will present a wealth of documents concerning loss analysis technology which is still evolving.

Motor Design

JMAG has absolute confidence in its analysis of motors.
Even though the motor is a mature device with a 100-year history, fierce technological competition is in progress to improve performance even today, for which FEA is an indispensable design technology.
JMAG has a parameter-based motor design support tool, JMAG-Express, that allows you to test a designer’s ideas immediately. Global design search is possible among various motor types and parameters.

Large-scale model computation

The time allowed for the design of automobiles and electrical devices is getting shorter every year. Analysis software is often used as one way to reduce design time.
Speed is directly linked to accuracy and reliability. High-speed processing for large-scale computations is essential for detailed understanding of phenomena inside devices and for searching a design space.
JMAG continues to work on attaining higher speeds by developing and tuning algorithms.
In order to reduce analysis times, we have enhanced HPC solutions and provide MPP solvers and GPU solvers.


In recent years the need for multiphysics has increased. JMAG has implemented a magnetic field – thermal coupled analysis function for induction heating device design, and a magnetic field – NVH for electromagnetic noise countermeasures, and has started providing them to users.
In addition, in order to meet a wider range of needs, we have partnered with CAE partners in various analysis fields to build and maintain an easy-to-use environment.
There are many examples from which to check.

Analysis Methods

In electrical device design, analysis software is used to create the best product in the design period allowed.
With high performance being demanded and accurate analysis being required these days, reducing processing times is a strong wish among software users.
JMAG achieves time savings by using various analysis methods. Please search for useful analysis methods for your needs.

Date: May 23 (Thursday) , 2019 from 10:20 a.m to 10:50 a.m.
Place: W213
Speaker: Yusaku Suzuki,JMAG Business Company Marketing & Sales Manager
URL:  (Japanese)
High-Accuracy Virtual Efficiency Map Automatic Generation for Electric Vehicles

Electric vehicle traction motor efficiency is linked to fuel consumption making it important to evaluate efficiency maps using high-fidelity motor and control models.
A workflow is proposed for automatically and rapidly generating and verifying detailed 3D motor model efficiency maps using JMAG.

◇2019 JSAE Annual Congress (Spring) Session
Date: May 24 (Friday) , 2019 from 3:35 p.m.
Place: Room302
Speaker: Hiroyuki Sano, JMAG Business Company Marketing & Support Section Manager
Session Name: Traction Motors for EV/HEV
Sesoin No.62:Requirements for Accuracy of Electromagnetic Simulation for Model Based E-Motor Development

A highly accurate plant model is indispensable from model-based development motor drive simulation through automotive ECU test and validation. By using JMAG-RT , it is possible to generate a highly accurate plant model from an electromagnetic field FEA model. However, the plant model used in model-based design requires accuracy comparable to an actual machine. This is a level different from the accuracy required for FEA in motor design.
JMAG-RT has incorporates a highly-accurate evaluation of the magnetic saturation effects and the mechanical angle dependency of both the inductance and torque. This JMAG-RT model satisfies the accuracy required in design and evaluation. We will be introducing case studies where this can be used in model-based development of ECU.


Dates May 23 (Thursday) , 2019
Location PACIFICO YOKOHAMA (Kanagawa, Japan)
Booth 184


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