JMAG Open Interface programs

In recent years, the sophistication of electrical equipment design is required. As known there is a limit to the design of magnetic circuits alone, therefore multifaceted evaluations such as structure, vibration, heat, and control are required at the same time.
It is more efficient to perform coupled analysis by linking different software where they have their own strength in the respective physical phenomenon rather than to adhere to one CAE software.

Challenges and solutions for coupled analysis

It is not easy to build a coupled analysis mechanism because it is necessary to know the details and interfaces of both CAE software that are linked.
Therefore, we have no choice but to rely on IT engineers who are familiar with using CAE software, but IT engineers may not always be able to easily obtain the necessary interface information.
Concerns remain about analysis accuracy, such as the accumulation of errors due to the exchange of physical quantities between different models and meshes.

Solutions based on JMAG for coupled analysis

Various partners and collaboration methods

What is Multi-Purpose File Export Tool?

  • Coupling method via commonly-used files as proposed by JMAG
    • It is easy to arrange the coupling setup since commonly-used and intuitive files, such as CSV and structural analysis files, are used.
  • Mapping of physical quantities and changing analysis type
    • Various types of conversions vital for coupling, such as mappings between different meshes and changing from the time axis to the frequency axis, can all be carried out in the Multi-Purpose File Export Tool.
the Multi-Purpose File

Characteristics of Multi-Purpose File Import/Export Tool

Export function Descriptions
Major physical quantities Electromagnetic force, Loss, Magnetic flux density, Displacement (Displacement)
Filtering function Changing analysis type (such as frequency analysis results→transient analysis results)
Mapping function
  • Mapping for a model having different meshes. Compatible with mesh created by those other than JMAG.
  • Expand 2D model into 3D model/Full model conversion.
  • Various ”post calculation” options.
    • Able to specify parts and ranges (such as for time and frequency) to be output.
    • Merge multiple result files, which is possible even when analysis types differ.
Preview function For checking mesh models and results after mapping
Import function Descriptions
Major physical quantities Heat transfer coefficient, stress, temperature distribution, displacement (deformation)
Import distributions Read CSV files that contain information on coordinate values and physical quantities at those coordinates.
Mapping function Automatically/manually determines the distance when searching for coordinates.
Preview function Preview of output items in advance

Cases considered in the coupled analysis

1.One-way coupled analysis

  • Coupled analysis performed by JMAG users alone
    • From JMAG to other CAE software
    • From other CAE software to JMAG
Coupled analysis performed by JMAG users alone

2.Coupled with various CAE softwares

  • Two-way coupled analysis built by an IT engineer in charge of MBD
    • Can be freely coupled with multiple CAE software, including In-house system
Two-way coupled analysis built by an IT engineer in charge of MBD


Apply for JMAG open interface program


Case studies by users working with JMAG.
※updated every Wednesday

Currently provided data

After registering as a member, you can utilize the sample data.

Structural/vibration analysis

SPM Motor Electromagnetic Force Distribution (Stator Electromagnetic Vectors)

The data in this document is obtained by outputting the electromagnetic force distribution of the motor time history obtained with JMAG to frequency domains. This data can be used when simulating vibration in frequency analysis using the electromagnetic force of the motor as the excitation force. Mesh information, step information, and result data (physical quantities) are included in output files.

Electromagnetic Force Distribution of SPM Motors (Electromagnetic Force for Each Tooth)

This sample data is output from the motor electromagnetic force obtained in JMAG for each tooth according to the rotation angle region, time domain, and frequency region settings. This can be used to run vibration analysis using the motor’s electromagnetic force as excitation force. The output file contains the result data (physical quantities).

Thermal analysis

Loss Density Distribution of IPM Motors

This sample data is an output of the motor loss distribution obtained in JMAG and can be used when temperature analysis is run using the motor’s heat generation as the heat source. The output file contains mesh information, step information, and result data (physical quantities).


This is an interface for developing integrated programs. Do not apply for any other purpose.
STEP1: Apply for JMAG open interface program
STEP2: Agree to the terms and conditions
STEP3: After confirming your application, enter your ID/PW on the dedicated log-in page


Please check for other company tools that are already integrated.
To use this interface, you must agree to the Terms of Use for JMAG interface information of use.