Maxwell and Simplorer Tips and Tricks - Ansys © 2011 ANSYS, Inc. September 8, 2011 Maxwell and Simplorer Tips and Tricks Ryan Magargle, PhD Ansys, Inc. ... • Click Draw Clip Plane

© 2011 ANSYS, Inc. September 8, 2011 1

Maxwell and Simplorer Tips and Tricks

Ryan Magargle, PhD

Ansys, Inc.


Simplorer System Design

PP := 6

ICA:

A

A

A

GAIN

A

A

A

GAIN

A

JPMSYNCIA

IB

IC

Torque JPMSYNCIA

IB

IC

Torque

D2D

Maxwell 2-D/3-D Electromagnetic Components

PExprt Magnetics

RMxprt Motor Design

Q3D

Parasitics

ANSYS

Mechanical Thermal/Stress

ANSYS Icepack

Model order Reduction

Co-simulation

Field Solution

Model Generation

Electromechanical Simulation


Maxwell Description

Pro

ject

Man

ager

P

rop

erti

es W

ind

ow

Message Manager Progress Window

Modeler Window

Solution Type

Post-Processing


Maxwell Highlights


Outline

Maxwell

– Geometry

– Transient

– Post-Processing

Simplorer

– Transient Solver

– Post-Processing

– Advanced Analysis


Maxwell Geometry Interface

Topic

• Remove geometry commands in any order to reduce the need for redrawing geometry



Example

• Create motor coils for symmetry, then change mind and undo symmetry



Topic

• Increase geometry visibility with split planes



Steps

• Click Draw Clip Plane

• Click Add-> Specify Center, Normal

1

2

1

2



Steps

• Grab and drag to change clip plane view


Outline

Maxwell

– Geometry

– Transient

– Post-Processing

Simplorer


– Post-Processing



Maxwell Transient Solver

Topic

• Multiple objects with independent motion

Actuated magnet has motion prescribed by user

Free magnet moves with its own inertia to align with actuated magnet



Setup

• Draw a “band” around each object with independent motion

• Assign axis of rotation and type of motion

Air region

band1 band2

magnet1 magnet2

Axis of rotation1

Axis of rotation2

1

2

1

2



Setup

• Apply mesh operations

• Specify time step and stop time 3

4

3

4



Setup

• Plot flux lines

• Plot motion and animate

3

4

0.00 50.00 100.00 150.00 200.00Time [ms]

-100.00

0.00

100.00

200.00

300.00

Po

sit

ion

[d

eg

]

Maxwell2DDesign1Magnet Motion ANSOFT

Curve Info

Victim MagnetSetup1 : Transient

Source MagnetSetup1 : Transient

3

4



Topic

• Define complex transient excitation with functions and datasets

0.00 2.50 5.00 7.50 10.00 12.50 15.00 17.50 20.00Time [ms]

-1.25

-0.63

0.00

0.63

1.25

Inp

utC

urr

en

t(W

ind

ing

1)

[A]

Maxwell2DDesign1Input Current Waveform ANSOFT

Curve Info

InputCurrent(Winding1)Setup1 : Transient

1A Sinusoid + .15A Triangle



Steps

• Define coil cross section as a ‘coil’ with turns.

• Define winding with current function:

– 1A*Sin(2*Pi*50*time)+ 0.15A*pwl_periodic(ds1,time) 1

2

Periodic piecewise linear interpolation function of numeric dataset, defined by user

1

2



Steps

• pwl_periodic(ds1,time) causes Maxwell to prompt for dataset definition

Unit Amplitude Triangle Wave



Resulting Current Waveforms

0.00 5.00 10.00 15.00 20.00Time [ms]

-100.00

-50.00

0.00

50.00

100.00

Ind

uc

ed

Vo

lta

ge

(Win

din

g1

) [V

]

Coil Back EMF ANSOFT

Curve Info

InducedVoltage(Winding1)Setup1 : Transient

0.00 5.00 10.00 15.00 20.00Time [ms]

-1.25

-0.63

0.00

0.63

1.25

Inp

utC

urr

en

t(W

ind

ing

1)

[A]

Input Current Waveform ANSOFT

Curve Info

InputCurrent(Winding1)Setup1 : Transient

1A*Sin(2*Pi*50*time)+ 0.15A*pwl_periodic(ds1,time)



Topic

• Define variable timestep to capture complex waveform shape.

Broadband excitation for sensing applications



Steps

• Define coil cross section as a ‘coil’ with turns.

• Define winding with current function:

– 1A*Sin(2*Pi*(1250*time+50)*time)

Frequency increases linearly from 50Hz to 150Hz in 8 fundamental periods

1

2

1

2



Steps

• Capture 30 steps per period, for 8 fund. periods – 1/30/(1250*time+50)

3

3


Outline

Maxwell

– Geometry

– Transient

– Post-Processing

Simplorer


– Post-Processing



Maxwell Post-Processing

Topic

• Use fields calculator to plot only Br in airgap for electric machine

Flux Density Contour

Flux Density Vector Radial Flux Density Vector



Calculator

• Scalar Field:

• Vector Field:

Steps

• Define Br

• Save Br as a new Field Expression

• Define Br_vec using Br

• Save Br_vec as a new Field Expression

yxyyxxrr iiiBiBiBB sincos

yxrrrr iiBiBB sincos



Calculator: Define Br

• Input -> Quantity -> B

• Vector -> Scalar? -> ScalarX

• Input -> Function -> Phi

• Scalar -> Trig -> Cos

• General -> *

• Input -> Quantity -> B

• Vector -> Scalar? -> ScalarY

• Input -> Function -> Phi

• Scalar -> Trig -> Sin

• General -> *

• General -> +

• General -> Smooth

• Library -> Add… -> “Br”

Calculator: Define Br_Vector • Named Expressions -> Br ->

Library -> Copy to Stack • Input -> Function -> Phi • Scalar -> Trig -> Cos • General -> * • Scalar -> Vec? -> VecX • Named Expressions -> Br->

Library -> Copy to Stack • Input -> Function -> Phi • Scalar -> Trig -> Sin • General -> * • Scalar -> Vec? -> VecY • General -> + • Library -> Add… -> “Br_vec”



Topic

• Graph the radial flux density in the gap

0.00 10.00 20.00 30.00 40.00 50.00 60.00Distance [mm]

-0.13

0.07

0.27

0.47

0.67

0.88

Br

[ T

]

Radial Flux Density in Air Gap Over One Pole ANSOFT



Steps

• Draw-> Arc -> 3 point Arc

• Create Fields Report

• Select the arc and Br

1

2

3

0.00 10.00 20.00 30.00 40.00 50.00 60.00Distance [mm]

-0.13

0.07

0.27

0.47

0.67

0.88

Br

[ T

]

Radial Flux Density in Air Gap Over One Pole ANSOFT



Take Spatial FFT

Steps:

• Right click Setup1 and select Perform FFT on Report

• Select the flux density plot and select magnitude for the spectral plot.

1

2

0.00 100.00 200.00 300.00 400.00 500.00FFT Distance Harmonic

0.00

0.10

0.20

0.30

0.40

0.50

FF

T B

r

FFT Radial Flux Density in Air Gap Over One Pole ANSOFT

1

2


-60.00 -40.00 -20.00 0.00 20.00 40.00H [A / m] [kA_per_m]

0.00

0.20

0.40

0.60

0.80

1.00

1.20

1.40

B [

T ]

BH Operating Point in Iron and Air ANSOFT

Curve Info

Imported BHImported

Operating Point IronSetup1 : LastAdaptive


Topic

• Display magnet operating point on BH curve



Steps

• Export BH curve for Alnico5

• Add header to BH text file

• Solve design in iron or air fixture

1

2

3

1

2

3


-60000.00 -40000.00 -20000.00 0.00 20000.00 40000.00H [A / m]

0.00

0.20

0.40

0.60

0.80

1.00

1.20

1.40

B [

T ]

BH Operating Point in Iron and Air ANSOFT

Curve Info

Imported BHImported

Operating Point IronSetup1 : LastAdaptive

Operating Point AirImported


Steps

• Use calculator to define Hx and Bx

• Draw a point to evaluate fields

• Create fields report of Bx vs Hx at defined point

• Import BH curve into report

• Paste results from other simulations 5

4

6

7

8

5

4

6

7

8


Outline

Maxwell

– Geometry

– Transient

– Post-Processing

Simplorer


– Post-Processing



Simplorer Highlights


Simplorer Transient Solver

Topic: Enable on sheet live update for plots

• Tools > Options > Simplorer Options > General Options


Simplorer Post-Processing

Topic: Create numerical display

• Add display to schematic for instant numeric display of circuit gain

0

0

0

E1

AMPL=0.01V

FREQ=1000Hz

VccEMF=12V

RB1a50kOhm

RE15kOhm

RB2a100kOhm

RB2b22kOhm

RE21kOhm

SPICE_NPN1

SPICE_NPN2

CC1

1uF

CC2

1uF

+

V

VM1

TR

Probe

TR_Probe1

EQU

gain:=TR_Probe1.PKPK /(E1.AMPL *2)

RB1b50kOhm

RC2RC

CE210uF

Vb1

Ve1 Ve2

Vc2

Vb2

0.10 0.30 0.50 0.70 0.90Time [ns]

0.10

0.50

0.90

E1

.V [V

]

Curve Info pk2pk

E1.VTR

0.10 0.35 0.60 0.85Time [ns]

0.10

0.50

0.90

Vc2

.V

Curve Info pk2pk

Vc2.VTR



Steps

• Create a data table

• Pare To: Time Max

1

2

1

2



Steps

• Drag plot onto schematic 3


Outline

Maxwell

– Geometry

– Transient

– Post-Processing

Simplorer


– Post-Processing



Simplorer Advanced Analysis

Topic: Statistical Analysis

• Vary component parameters to measure manufacturing variation on performance

0

0

0

E1

AMPL=0.01V

FREQ=1000Hz

VccEMF=12V

RB1a50kOhm

RE15kOhm

RB2a100kOhm

RB2b22kOhm

RE21kOhm

SPICE_NPN1

SPICE_NPN2

CC1

1uF

CC2

1uF

+

V

VM1

TR

Probe

TR_Probe1

EQU

gain:=TR_Probe1.PKPK /(E1.AMPL *2)

RB1b50kOhm

RC2RC

CE210uF

Vb1

Ve1 Ve2

Vc2

Vb2

0.10 0.30 0.50 0.70 0.90Time [ns]

0.10

0.50

0.90

E1

.V [V

]

Curve Info pk2pk

E1.VTR

0.10 0.35 0.60 0.85Time [ns]

0.10

0.50

0.90

Vc2

.V

Curve Info pk2pk

Vc2.VTR



Steps

• Select properties for each resistor.

• Select distribution for each resistor.

1

1

2

2



Steps

• Add statistical analysis

• Define Monte Carlo iterations

• Define measured output

3

4

5

3

5

4



Steps

• Execute statistical analysis

• View analysis results

6

7

6

7



Topic: Import complex load waveforms from empirical data

• Reduce a complex sub-system to data from measurements.



Steps

• Import text file as a dataset

• Use datapairs block for dataset interpolation

• Select the dataset in (1)

1

1

2

2

3

3



Steps

• Plot interpolated source and output.



Topic: Digitize datasheet information using the sheetscan tool.

• An automated approach to digitizing measured data for use in simulation.



Steps

• In datasets window select sheetscan source

• Picture -> Load Picture

1

2

1 2



Steps

• Coordinate System -> New, Click to locate coordinate axes

• Curve -> New, click to locate datapoints

• File -> Export, to export text file

3

4

3

4

5

5


Workbench Coupling

Topic: Coupling Designs in Workbench

• Link the geometry and transfer heat dissipation from magnetics to thermal.


Workbench Coupling

Steps

• Drag Geometry, Maxwell3D, and Steady State thermal blocks onto the schematic

• Link Geometries and solutions by drag and dropping.

1

2


Workbench Coupling

• Create your geometry

• Setup and solve Maxwell

• Setup and solve Thermal.

– Coupling meshes is automatic, select which geometries to include.

1

2

3

4

1

2 3

4


Questions?

Documents

Maxwell and Simplorer Tips and Tricks - Ansys © 2011 ANSYS, Inc. September 8, 2011 Maxwell and Simplorer Tips and Tricks Ryan Magargle, PhD Ansys, Inc. ... • Click Draw Clip Plane