JMAG-Express Online [Free Software]

JMAG-Express Online gains an major version upgrade as of February 3 2020.
Click here for more info icon-arrow-circle-right 
JMAG-Express Online – Capable of Computing Basic Motor Characteristics in Just 1 Sec

JMAG-Express Online is a parameter-based motor design support tool.
JMAG-Express Online now has the ability to evaluate all the motor characteristics like Torque- Speed characteristics, Loss characteristics, Inductance characteristics, etc.
Because JMAG-Express Online can be used with tablets and smartphones, you can design motors anytime, anywhere, on the go or at home.

No installation required.
JMAG-Express Online can be used for free after creating an account.

Start using JMAG-Express Online

To all users of JMAG-Express Public
The August 5, 2019 update eliminates many of the differences with JMAG-Express Public.
If you have applied for JMAG-Express Online but have not been using it, please use the updated version.
The update is here. icon-arrow-circle-right 

JMAG-Express Online

Extract motor characteristics in an instant

Displays motor characteristics form design specifications with one click
Requires no analysis experience

Evaluate torque, efficiency, loss, and inductance characteristics with graphs and numerical values

Rotation speed vs torque characteristics, iron loss / copper loss characteristics, etc. are displayed in graphs in an instant.
Motor characteristics can be confirmed from tables of machine constants.

Performance Graph

Design sheet

Define geometries with templates

Templates for PMSMs, induction machines and brush motors are available.


(Permanent magnet synchronous motors)

(Permanent magnet synchronous motors)
Induction motor

Induction motor

Switched reluctance motors
Permanent magnet DC motors

Permanent magnet DC motors
Synchronous machines

Synchronous machines

Geometry sizing

A rough physical size can be decided simply by entering the minimum output expected of the motor.
Geometry and drive conditions can also be narrowed down by entering more information.

Efficiency Maps NEW!

The motor operating range, as well as efficiency and power output at each operating point, can be checked by using the map function. When creating maps, voltage and current limits can be applied. Multiple maps can be compared while using the parametric function.

Temperature Evaluation NEW!

The thermal model is evaluated using various heat generation sources like Copper Losses, Iron Losses, and Mechanical losses.

Design a Motor in 5 Minutes

When the desired power 50(kW) is specified, the size and comparative loading needed to achieve it are calculated automatically.
* This is not a video. There are items on the right side of this slide. Click the item you want to see, or click “Next >>” at the bottom of the screen to move forward with the slide.

Design a Motor in 5 Minutes (slide)


2020/02/03 NEW!
JMAG-Express Online Update
■ Main features
  • Efficiency Maps
  • Temperature Evaluating
2019/08/05 NEW!
JMAG-Express Online Update
■Main features
  • Supports parametric functions
  • Supports evaluation results CSV file output
  • Graph display flexibility (specifying two axes, display order, etc.)
Other modified items are here  icon-arrow-circle-right 
■Functions not supported by JMAG-Express Online
  • DXF file importing
  • Sensitivity analysis
Other known defects (RIDs) are here icon-arrow-circle-right 
2018/06/07 JMAG-Express Online (JMAG-Express Web version) released