Machine Design Tool for Design Engineers

JMAG-Express
JMAG-Express quickly performs multifaceted evaluation to obtain machine design that meets
performance requirements.
Operations are easy with templates for motor geometry and evaluation results. The templates can bereused and you can run multipurpose optimization with the built-in engine.
Design exploration covers magnetic, thermal, structural, and control design and tests a wide range athigh speed from concept design to detailed design.

Eﬃciency Map

Temperature

30098Stress12097200

10096

094

Temperature (degC)

95Eﬃciency (%)

Torque (Nm)100

93-100

80

60

40

92
20-20091-300
1,000

090
2,000

3,000

4,000

5,000

6,000

7,000

8,000

9,000

0

10,000

100

200

300

400

500

600

700

800

900

1,000Time (sec)

Speed (rpm)

Flux Line

Back EMF

Cogging Torque
800

0.5
0.4

600

0.3
400
0.2
200

0.1

000

2

4

6

8

10

12

14

0

16-0.1

10

20

30

40

50

60

70

80

90-200

-0.2
-400
-0.3
-600

-0.4
-0.5-800

Capabilities
One-click simultaneous evaluation of magnetic, thermal, and structural characteristics of motors
High-speed calculation makes way for evaluation of multiple motor designs● Run a detailed evaluation in JMAG-Designer by just switching display mode
● Flexible support for analysis accuracy requirements and various applications● Control simulation and NVH evaluation coupled with other tools●●Evaluation items
You can add and reuse templates of what you want to evaluate
Preinstalled- Magnetic design: machine constant, efficiency map,
cogging torque, torque ripple,
induced voltage, demagnetization- Thermal design: natural/forced cooling, cooling jacket,
temperature evaluation in a drive cycle- Structural design: stress evaluation●Motor types
You can add and use 2D or 3D custom shapes● Custom● Preinstalled- Axial Gap Motor- PMSM- Claw-Pole Motor- IM- SRM
- WFSM/EESM- Brush Motor- SynRM- Universal Motor etc.

Main functions of JMAG-Express■ Eﬃciency map and temperature evaluation

during drive cycle
Torque (Nm)Eﬃciency (%)

Temperature (deg C)

1002000-200800Speed (r/min)

Temperature for specific parts during WLTCdriving mode

110
Coil-- MagnetCreate efficiency maps quickly. During WLTC mode drive, you canalso check the efficiency, loss, and more. These loss histories canthen be referenced in thermal design, and the temperature historyof the parts can be evaluated. After running WLTC mode drive, themagnet and coil temperatures have increased by 5 deg C and 35
deg C, respectively.

90

70
0900

10,0001,800Time (s)Eﬃciency map and operating points
for driving mode

Time history of temperature
ATF spray

Temperature (deg C)

90■ Evaluate part temperatures and investigate

cooling speciﬁcations
Temperature evaluation of motors cooled bycooling jackets and ATF sprayb, da85c80

d75bac70

Thermal circuit models are available for general cooling types formotors. Multiple temperature evaluation points are established in theaxial and circumferential directions in addition to the temperatures foreach part. Temperature evaluation is then run accounting for thedeviations in cooling that occur as a result of each cooling type.

0300

600

900

ATF poolTime (s)Temperature (deg C)

90

From the graph, it can be seen that temperatures are higher at thecoil ends where the ATF spray is not directly applied, as well as themiddle of the coil. This occurs even within the same coil.

f85ee, gfg

80
75700

■ Simultaneous evaluation of magnetic and300

structural characteristics
Max. torque (Nm)

220

300
Accepted range

210

200

0.45

0.65

1000.85

Max. stress (MPa)230

Max. stress
400

200
0.25

Bridge width (mm)Rotor shape and design variable

900
Water cooling jacket
Temperature evaluation points

Max. torqueBridge width600
Time (s)Design plans that meet requirements for
maximum torque and maximum stress
Evaluated maximum torque and maximum stress with design
variable of the bridge width. When making bridge width wider,stress decreases but the maximum torque is also decreased. Bothrequirements of torque and stress are fulfilled around 0.65mm.

Bridge width, maximum torque and stress■ Design exploration using the built-in

1,450

9 geometry dimensions are the variables for an 8-pole, 48-slot IPM
m o t o r. P a r a m e t e r o p t i m i z a t i o n i s r u n w i t h a v e r a g e t o r q u emaximization, torque ripple minimization, and loss minimization as theobjective functions. By accounting for not only magnetic
characteristics as a constraint condition in the early stages of design
but also design requirements such as thermal, stress, and ripple,even more appropriate design plans can be narrowed down evenfaster.

3,000

1,350

2,600
Loss (W)

Design exploration results that vary dependingon the constraint conditions to account for

Loss (W)

optimization engine

2,200

1,250300

1,800
1,400
1,000
100 150 200 250 300 350 400 450 500320340
360
Torque (Nm)

380400●: Magnetic design only●: Magnetic, thermal, stress●: Magnetic, thermal, stress+ripple

Torque (Nm)*The names of the products and services are the trademarks or registered trademarks of the copyright holder.

JMAG Business Company
JSOL Corporation
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1-6-5,Kudanminami,Chiyoda-ku,Tokyo 102-0074, Japan
TEL +81(0)3-6261-7361
E-mail : info@jmag-international.com

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