JMAG-Express

JMAG-Express is a tool to support motor design. All template-based, it includes everything from concept design with JMAG-Express Quick Mode to basic design and detailed design with JMAG-Express Power Mode. It can export motor models (JMAG-RT models) at any stage, allowing SILS and HILS to be done.

Functions

Freely define geometry templates

  • Templates for PMSMs, induction motors, brush motors, and universal motors have all been prepared.
  • You can add geometries created in JMAG-Designer as templates.
  • JMAG-Express Power mode can evaluate the motor characteristics of PMSMs and induction motors. Use JMAG-Designer for brush motors and universal motors.

Built-in database

  • You can search for model data by design parameters, output, and design date from a wealth of design proposals.
    E.g. Searching for model data where the slot combination is 4 poles and 24 slots
    – Search model data where the average torque is over 3 Nm
    – Search model data that was calculated on May 25, 2012

Geometry sizing

  • JMAG-Express Power mode will recommend a geometry and drive conditions if you simply enter the minimum output expected of the motor.
  • Of course, you can also narrow down the geometry and drive conditions by entering more information.

An extensive material database

  • JMAG-Express Power mode has approximately 730 types of characteristics data built-in, just like JMAG-Designer.
  • Precise material designs are completed by selecting the material name.

Parametric Analysis

  • Geometry, materials, windings, and drive conditions can be entered as parameters, which enables characteristics evaluations.
  • Multiple designs can be easily compared.

Running the analysis remotely

  • You can use an external calculation server.
    E.g. When there are a lot of analysis cases

Saving and reading setting parameter files

  • You can save setting parameter files separately from geometry data.
  • This should come in handy during system automations like linking with opimization softwares.

JMAG Function Videos

 icon-youtube-play Related Videos

JMAG-Express Quick mode

JMAG-Express allows calculation of basic motor properties in one second.
Just by entering the geometry template, materials, winding, and drive conditions as parameters, you can obtain the induced voltage constant, torque constant, inductance properties, current vs. torque properties, revolution speed vs. torque properties, iron loss/copper loss properties, etc. in a split second. When the desired power (W) is specified, the size and comparative loading needed to achieve it are calculated automatically.

JMAG-Express screen

Quick Mode results screen

Features

Evaluate basic motor properties by simply entering parameters
  • Just enter the geometry template, materials, winding, and drive conditions as parameters.

JMAG-Express screen

Geometry Modeling

Material Designs

Coil Settings

Drive Conditions

Evaluate torque, efficiency, loss, and inductance properties with a graph or numerically
  • Revolution speed vs. torque properties, iron loss/copper loss properties, etc. are instantaneously displayed in a graph.
  • Motor properties can be viewed in a machine constant table.

Properties Graph

Machine Constant Table

JMAG-Express Power mode

JMAG-Express Power mode is a design tool that allows you to perform motor design and evaluation by simply inputting parameters, like geometry, winding, and rotation speed, that follow a template.
It utilizes the finite element method’s highly accurate analysis ability to evaluate eddy current losses in magnets and iron losses from local magnetic saturation or harmonic currents.
JMAG-Express Power mode also supports more detailed design studies by seamlessly using models and results from JMAG-Designer, the electromagnetic field analysis software.

Features

JMAG-Express Power mode delivers highly accurate results with simple settings
  • Simply input the design parameters for geometry, materials, winding, and drive conditions.
  • No prior analysis knowledge is necessary.
  • It automatically carries out the process from analysis model creation to results output.

It evaluates efficiency maps and losses from magnetic saturation and harmonic current, which are essential to a motor’s performance analysis.
  • Magnetic flux density distribution or iron loss density distribution
  • Joule loss frequency analysis
  • Magnet eddy current loss distribution
  • Efficiency maps


Getting a more detailed study by seamlessly connecting with JMAG-Designer or a control circuit simulator
  • Start up JMAG-Designer by clicking the calculation result screen.
  • Generate an RT model while maintaining the design parameters.

A comparison of JMAG-Express Quick mode and JMAG-Express Power mode

Quick mode

Target motor Output
PMSM
IM
Externally excited synchronous machine
Simple calculation
  • Speed-Torque curve
  • Torque/efficiency
  • Copper loss/iron loss
  • Inductance
  • Voltage
  • Magnetomotive force distribution
SRM
Simple calculation
  • Speed-Torque curve
  • Torque/efficiency
  • Copper loss/iron loss
  • Inductance
  • Voltage
Brush motor
Simple calculation
  • Speed-Torque curve
  • Torque/efficiency
  • Copper loss/iron loss
  • Voltage
Wound-field AC synchronous machine
Simple calculation
  • No-load saturation curve (OCC) / three phase short circuit curve (SCC) / gap line (AGL) / zero-power-factor full load saturation curve (ZPF)
  • phasor diagram

Power mode

Target motor Output
PMSM
Basic characteristics
  • No-load
    • Cogging torque waveform
    • Induced voltage waveform
    • Magnetic flux density distribution
    • Loss values in the stator core
    • Iron loss density distribution in the stator core
  • Loading
    • Torque waveform
    • Voltage waveform
    • Magnetic flux density distribution
    • Loss values in the stator core
    • Iron loss density distribution in the stator core
  • Inductance
    • beta characteristics for Ld/Lq
    • beta characteristics for the reluctance torque, magnet torque, and total torque
  • Efficiency maps
    • Speed-Torque curve, Efficiency maps
Iron loss analysis considering PWM carrier harmonics
  • Rotor core and stator core losses (hysteresis loss, joule loss, iron loss)
  • Joule loss frequency characteristics
  • Loss density distribution (iron loss, hysteresis loss, joule loss)
Magnet eddy current loss analysis that accounts for PWM
  • Eddy current loss variations from the number of magnet divisions
  • Eddy current loss density distribution contour plots, Eddy current loss density vector plots
Segregation analysis of torque components
  • Magnetic flux density distribution and magnetic flux lines for the magnetomotive force in the current and magnet
  • beta characteristics for the reluctance torque, magnet torque, and total torque
IM
Equivalent Circuit Parameters
  • Magnetic flux density distribution (During constraint, During no-load)
  • Current Density Distribution (During constraint)
  • Secondary Resistance (During constraint)
  • Leakage Inductance (During constraint)
  • Excitation inductance (During no-load)
Drive Characteristics
  • Primary current/voltage
  • Primary copper loss
  • Secondary copper loss
  • Iron loss
  • Torque
  • Efficiency
  • Eddy current loss density distribution in the cage
  • Loss density distribution in the rotor and stator cores(hysteresis loss, joule loss, iron loss)
Torque Characteristics
  • Torque-Current curve
  • Current-Voltage curve
  • Eddy current loss density distribution in the cage
  • Loss density distribution in the rotor and stator cores(hysteresis loss, joule loss, iron loss)
Line Start Analysis
  • Rotation speed waveform during start-up
  • Torque waveform during start-up
  • Stator coil current waveform during start-up
SRM
I-Psi characteristics
  • I-Psi curve
  • Magnetic flux density distribution
Static characteristics
  • Flux linkage
  • Flux linkage waveform
  • Inductance
  • Inductance waveform
  • Torque
  • Torque waveform
Drive characteristics
  • Torque waveform
  • Current waveform
  • Copper loss waveform
  • Switching characteristics
Drive characteristics
  • Rotation speed versus torque
  • Rotation speed versus current
  • Rotation speed versus iron loss
  • Rotation speed versus efficiency