© 2013 ANSYS, Inc. March 3, 20141 ANSYS Confidential & Proprietary Information

ANSYS R15LF Electromagnetics Highlights

Ashish Deshpande

Ansys, Pune

© 2012 ANSYS, Inc. March 3, 20142

LF Electromagnetics

Performance Improvements

Customer Driven Development

Electromechanical System Integration

Design Flow Automation

© 2011 ANSYS, Inc. March 3, 20143

Enhanced scalability

Extended coverage

Large scale DSO

-8

-4

0

4

8

-20 -10 0 10 20

B (

kG

)

H (O)

Vector hysteresis

Core loss effects

EM Force Acoustic analysis

Embedded Software

HEV Libraries

IRR test circuit - 5SLD0650J4503000

00 00 0 0

+

V

UU

L_d

EQU FML1

Ut:=8.616e-005*(273.15 +TACT)L_d:=(Ud + VACT)/DIACTfrequ_gen:=1/PERIODTend:=PERIOD*Cycles

+

V

VM_Ur

ICA:FML_INIT2

TACT:=125IACT:= 650DIACT:=4200e6VACT:=2800PERIOD:=4uCycles:=15HMIN:=5nHMAX:= 10uEQU

FML3

deltaT:=PERIOD/128

if(time<deltaT) {UU:= time/deltaT*VACT;}else {UU:=VACT;}

if(time<deltaT) {II:= time/deltaT*IACT;}else {II:=IACT;}

A

AM_Irr

ICA:FML_INIT3

c_s:=4*1e-12r_s:= 4*sqrt(L_d/c_s)

Switch

II

Rs1

r_s

Cs1c_s

D_Ld

D_clamp

+

V

syncDI

U1

IRR test circuit - 5SLD0650J4503000

00 00 0 0

+

V

UU

L_d

EQU FML1

Ut:=8.616e-005*(273.15 +TACT)L_d:=(Ud + VACT)/DIACTfrequ_gen:=1/PERIODTend:=PERIOD*Cycles

+

V

VM_Ur

ICA:FML_INIT2

TACT:=125IACT:= 650DIACT:=4200e6VACT:=2800PERIOD:=4uCycles:=15HMIN:=5nHMAX:= 10uEQU

FML3

deltaT:=PERIOD/128

if(time<deltaT) {UU:= time/deltaT*VACT;}else {UU:=VACT;}

if(time<deltaT) {II:= time/deltaT*IACT;}else {II:=IACT;}

A

AM_Irr

ICA:FML_INIT3

c_s:=4*1e-12r_s:= 4*sqrt(L_d/c_s)

Switch

II

Rs1

r_s

Cs1c_s

D_Ld

D_clamp

+

V

syncDI

U1

Power devices

Electromechanical Systems

R15

Advanced Technology

and Multiphysics

High Performance Computing

Systems and Design Flow

Harmonic stress coupling

© 2012 ANSYS, Inc. March 3, 20144

Performance Improvements

Transient Steady State Analysis

2D Meshing

© 2013 ANSYS, Inc. March 3, 20145 ANSYS Confidential & Proprietary Information

6 cycles = 30 simulation hrs

• Drastically reduced cycles to reach AC steady-state

• Improvements extended to more LF related applications in R15

Significant Transient Solution Speed Up

100 cycles = 500 simulation hrs

16 X

Very Effective

Limitation:

With LF envelope component

© 2013 ANSYS, Inc. March 3, 20146 ANSYS Confidential & Proprietary Information

Uniform mesh advantages

• Enhance the accuracy of loss and force computation

• Avoid unnecessary numerical noise in symmetric model

Remarkable 2D Solution Time Improvement

Tau LayerClassic Skin Depth

12 mins 47 sec !!

> 1 min per time step

4 hrs 14 mins20X

© 2013 ANSYS, Inc. March 3, 20147 ANSYS Confidential & Proprietary Information

Customer Driven Development

Vector Hysteresis Modeling

Nonlinear Impedance for Electromagnetic Harmonic

Multiphysics Simulation

Device Characterization

© 2013 ANSYS, Inc. March 3, 20148 ANSYS Confidential & Proprietary Information

Basic Properties

Hx=0 ; Hz=0

Mx=0; Mz=0

�→

�→

Hy

My

2D/3D Vector Hysteresis Modeling

Competitive Advantages

-8

-4

0

4

8

-20 -10 0 10 20

B (k

G)

H (O)

Hysteresis Motor with Solid Rotor

Satisfy All Hystereis Properties

Memory Efficient

Convenient Parameter Identification

Minor Loop

handled inherently

9 © 2013 ANSYS, Inc. March 3, 2014 ANSYS Confidential

Nonlinear Impedance for LF Electromagnetics

Losses are approximately 15% higher for the

nonlinear boundary vs. the linear boundary

© 2013 ANSYS, Inc. March 3, 201410 ANSYS Confidential & Proprietary Information

Noise-Vibration in R15

Thermal

Electromagnetic Fluid Flow

Structural

Extended Multiphysics Simulation

© 2013 ANSYS, Inc. March 3, 201411 ANSYS Confidential & Proprietary Information

Electrical machine design

• Predict and reduce electromagnetic induced

vibration and noise from electric motor

Multiphysics - Harmonic Stress Coupling

Magnetic FieldStructural Dynamics

Acoustic Field

Forces

Displacements

© 2011 ANSYS, Inc. March 3, 201412

• Model and control arcing in electrical contactors

– An electric arc is an electrical breakdown of a gas that

produces an ongoing plasma discharge, resulting from a

current through normally nonconductive media, such as air

• Analyze the H field and voltage due to the arc

– Plasma* in-between two metal bars

– Coupling of fluid motion and electromagnetics

• Realistic simulation must consider saturation in the

ferromagnetic splitter plates

Multiphysics - Element Based Conductivity Coupling

I

I

*Note: CFD is used to simulate the plasma behavior

© 2011 ANSYS, Inc. March 3, 201413

Multiphysics - Element Based Conductivity Coupling

Eddy

Current

Solution1

Eddy

Current

Solution2

Eddy

Current

Solution3

Temperature Fluent Transient

t1 t2 t3

Conductivity

B fields, loss

distribution

Temperature

Conductivity

B fields, loss

distribution

B fields, loss

distribution

Conductivity

Time

Temperature

CFD Transient coupled with LF Electromagnetics Eddy-Current

© 2011 ANSYS, Inc. March 3, 201414

Multiphysics - Element Based Conductivity Coupling

Liquid Glass

Copper bars (current excitation)

Inox (water Cooling system)

Melting Pot Example The liquid glass is heated using eddy current induced at 282 kHz

Maxwell - Power Losses

Maxwell

Magnetic Flux Density

Fluent – Temperature Profile

© 2013 ANSYS, Inc. March 3, 201415 ANSYS Confidential & Proprietary Information

R14.5

• Users manually interate the coupled simulations

• 30 mouse clicks for 10 iterations

Multiphysics – Feedback Automation

R15

• Coupled simulations stop automatically

• Iteration status directly accessible in WB schematic

© 2013 ANSYS, Inc. March 3, 201416 ANSYS Confidential & Proprietary Information

0

0

Port1

Port2

Port3 Port4

Port6

Q1D

G

S

TJ

TC

Q2D

G

S

TJ

TC

Q3

Q4D

G

S

TJ

TC

Q5 D

G

S

TJ

TC

Q6

NTC

Sh

un

t

FTCO3V455A1 Pkg

Sh

un

t_N

Ph1_Sense

Q1

_S

Q4

D

Ph2_Sense

Q2

_S

Q5

_D

Ph3_Sense

Q3

_S

Q6

_D

Q1

_G

Q2

_G

Q3

_G

Q4

_G

Q5

_G

Q6

_G

Sh

P_

Q4

_S

Sh

P_

Q5

_S

Sh

P_

Q6

_S

Th

1_

Pa

d

Th

2_

Pa

d

Vb

att_

Q1

_D

Vb

att_

Q2

_D

Vb

att_

Q3

_D

Vbatt_Sense

GND

Ph1

Ph2

Ph3

Q1

_G

_L

ea

d

Q2

_G

_L

ea

d

Q3

_G

_L

ea

d

Q4

_G

_L

ea

d

Q5

_G

_L

ea

d

Q6

_G

_L

ea

d

Sh

un

t_P

Th

1_

Le

ad

Th

2_

Le

ad

Vbatt

Vdc1EMF=13.8V

Vgs_Cmd1

Rgate

Rg

+

V

Vgs_Char

+

V

VM1

L1L=18uH

L2L=18uH

+

V

VM2

+

V

Vgs_Spice

Rgate1Rg

Vgs_Cmd2

+

V

Vbatt_Sense

A

Id_Char

A

Id_Spice

Tcase_Ext

L3L=10uH

+

V

Vds_Char

+

V

Vds_Spice

+

VVds_SpiceExt

+

VVds_CharExt

+

V

Vgs_SpiceInt

+

V

Vgs_CharInt

EQU

FML1

I

Char_Energy_Calc

I

Spice_Energy_Calc

Rgate2Rg

D1

D2

Rgate3Rg

ICA:

FML_INIT1

Rg:=45

A

Idc_Rtn

Overall Test Schematic

New Power Electronics Capabilities

Simplorer Power MOSFET

Q3D Package Parasitics

FTCO3V455A1 Pkg

Sh

un

t_N

Ph1_Sense

Q1

_S

Q4

D

Ph2_Sense

Q2

_S

Q5

_D

Ph3_Sense

Q3

_S

Q6

_D

Q1

_G

Q2

_G

Q3

_G

Q4

_G

Q5

_G

Q6

_G

Sh

P_

Q4

_S

Sh

P_

Q5

_S

Sh

P_

Q6

_S

Th

1_

Pa

d

Th

2_

Pa

d

Vb

att

_Q

1_

D

Vb

att

_Q

2_

D

Vb

att

_Q

3_

D

Vbatt_Sense

GND

Ph1

Ph2

Ph3

Q1

_G

_L

ea

d

Q2

_G

_L

ea

d

Q3

_G

_L

ea

d

Q4

_G

_L

ea

d

Q5

_G

_L

ea

d

Q6

_G

_L

ea

d

Sh

un

t_P

Th

1_

Le

ad

Th

2_

Le

ad

Vbatt

Vbatt_Sense

CFD LTI ROM Link

New Power MOSFET Module

© 2013 ANSYS, Inc. March 3, 201417 ANSYS Confidential & Proprietary Information

Design Flow Automation

Electric Machine Design Toolkit

Wire Power Transfer

User Experience

© 2012 ANSYS, Inc. March 3, 201418

Electrical Machines Design Flow

RMXprt

Maxwell2D

Maxwell3D

Toolkit

UDOs &Toolkit

Initial Design FE Design Optimal Design

© 2013 ANSYS, Inc. March 3, 201419 ANSYS Confidential & Proprietary Information

Seamless Customization via UDO/Toolkit

© 2012 ANSYS, Inc. March 3, 201420

Seamless Customization via UDO/ToolkitTotal loss

Copper loss

Core loss

Magnet loss

Magna Electronics IPM Motor

© 2013 ANSYS, Inc. March 3, 201421 ANSYS Confidential & Proprietary Information

Wireless Power Transfer

0

0

0

R1

7.2mOhm

R2

3.6mOhm

Cs

1.72uF

Cp

4.96uF

Rload

13ohm

W

+WM1

W

+WM2

D4

D3

D2

D1

IGBT4

IGBT3

IGBT2

IGBT1

C1

1000uF

TRANS4

DT4

TRANS3

SINE1.VAL > TRIANG1.VAL

TRANS2

DT1

TRANS1

SINE1.VAL < TRIANG1.VAL

STATE_11_4

SET: TSV4:=0SET: TSV3:=0SET: TSV2:=0SET: TSV1:=0DEL: DT4##Dead_Time

STATE_11_3

SET: TSV4:=0SET: TSV3:=1SET: TSV2:=1SET: TSV1:=0

STATE_11_2

SET: TSV4:=0SET: TSV3:=0SET: TSV2:=0SET: TSV1:=0DEL: DT1##Dead_Time

STATE_11_1

SET: TSV4:=1SET: TSV3:=0SET: TSV2:=0SET: TSV1:=1

TRIANG1

AMPL=1FREQ=Carrier_Freq

SINE1

AMPL=Modulation_IndexFREQ=Frequency

ICA:FML_INIT1

Modulation_Index:=0Carrier_Freq:=20kFrequency:=20k

DC_Source:=400Dead_Time:=2u

~

3PHAS

~

~

A * sin (2 * pi * f * t + PHI + phi_u)

PHI = 0°

PHI = -120°

PHI = -240°

THREE_PHASE1

D5

D6

D7

D8

D9

D10 Battery

- +

LBATT_A1

D11

D12

D13

D14

C2

1uF

2.00 2.20 2.40 2.60 2.80 3.00Time [ms]

-150.00

-100.00

-50.00

0.00

50.00

100.00

150.00

Y1

[A

]

Curve Info rms

WM1.ITR 41.6165

WM2.ITR 34.8648

2.00 2.20 2.40 2.60 2.80 3.00Time [ms]

-800.00

-300.00

200.00

700.00

Y1 [

V]

Curve Info rms

WM1.VTR 281.0066

WM2.VTR 321.9453

2.900 2.925 2.950 2.975 3.000Time [ms]

-250.00

-125.00

0.00

125.00

250.00

Y1

[A

]

-1000.00

-500.00

0.00

500.00

873.02

Y2

[V

]

MX1: 2.9200

MX2: 2.9811

-408.7847-315.0105-64.8250

-40.2840

-377.1247-319.5653 -53.6971

-0.0037

0.0610

Curve Info Y Axis rms

WM1.ITR Y1 38.9542

WM2.ITR Y1 34.1140

WM1.VTR Y2 276.0822

WM2.VTR Y2 316.6292

PWR

Probe

PWR_Probe1

Current_1:srcCurrent_2:src

Current_1:snkCurrent_2:snk

PWR

Probe

PWR_Probe2

0

0

0

R1

7.2mOhm

R2

3.6mOhm

Cs

1.72uF

Cp

4.96uF

Rload

13ohm

W

+WM1

W

+WM2

D4

D3

D2

D1

IGBT4

IGBT3

IGBT2

IGBT1

C1

1000uF

TRANS4

DT4

TRANS3

SINE1.VAL > TRIANG1.VAL

TRANS2

DT1

TRANS1

SINE1.VAL < TRIANG1.VAL

STATE_11_4

SET: TSV4:=0SET: TSV3:=0SET: TSV2:=0SET: TSV1:=0DEL: DT4##Dead_Time

STATE_11_3

SET: TSV4:=0SET: TSV3:=1SET: TSV2:=1SET: TSV1:=0

STATE_11_2

SET: TSV4:=0SET: TSV3:=0SET: TSV2:=0SET: TSV1:=0DEL: DT1##Dead_Time

STATE_11_1

SET: TSV4:=1SET: TSV3:=0SET: TSV2:=0SET: TSV1:=1

TRIANG1

AMPL=1FREQ=Carrier_Freq

SINE1

AMPL=Modulation_IndexFREQ=Frequency

ICA:FML_INIT1

Modulation_Index:=0Carrier_Freq:=20kFrequency:=20k

DC_Source:=400Dead_Time:=2u

~

3PHAS

~

~

A * sin (2 * pi * f * t + PHI + phi_u)

PHI = 0°

PHI = -120°

PHI = -240°

THREE_PHASE1

D5

D6

D7

D8

D9

D10 Battery

- +

LBATT_A1

D11

D12

D13

D14

C2

1uF

2.00 2.20 2.40 2.60 2.80 3.00Time [ms]

-150.00

-100.00

-50.00

0.00

50.00

100.00

150.00

Y1

[A

]

Curve Info rms

WM1.ITR 41.6165

WM2.ITR 34.8648

2.00 2.20 2.40 2.60 2.80 3.00Time [ms]

-800.00

-300.00

200.00

700.00

Y1 [

V]

Curve Info rms

WM1.VTR 281.0066

WM2.VTR 321.9453

2.900 2.925 2.950 2.975 3.000Time [ms]

-250.00

-125.00

0.00

125.00

250.00

Y1

[A

]

-1000.00

-500.00

0.00

500.00

873.02

Y2

[V

]

MX1: 2.9200

MX2: 2.9811

-408.7847-315.0105-64.8250

-40.2840

-377.1247-319.5653 -53.6971

-0.0037

0.0610

Curve Info Y Axis rms

WM1.ITR Y1 38.9542

WM2.ITR Y1 34.1140

WM1.VTR Y2 276.0822

WM2.VTR Y2 316.6292

PWR

Probe

PWR_Probe1

Current_1:srcCurrent_2:src

Current_1:snkCurrent_2:snk

PWR

Probe

PWR_Probe2

Wireless Power Transformer

© 2013 ANSYS, Inc. March 3, 201422 ANSYS Confidential & Proprietary Information

Eddy Current Matrix Post Processing

Geometric Coil Turns Lumped Object

2 pins !!105 concentric rings

210 pins !!

© 2013 ANSYS, Inc. March 3, 201423 ANSYS Confidential & Proprietary Information

0

0

0

R1

7.2mOhm

R2

3.6mOhm

Cs

1.72uF

Cp

4.96uF

Rload

13ohm

W

+WM1

W

+WM2

D4

D3

D2

D1

IGBT4

IGBT3

IGBT2

IGBT1

C1

1000uF

TRANS4

DT4

TRANS3

SINE1.VAL > TRIANG1.VAL

TRANS2

DT1

TRANS1

SINE1.VAL < TRIANG1.VAL

STATE_11_4

SET: TSV4:=0SET: TSV3:=0SET: TSV2:=0SET: TSV1:=0DEL: DT4##Dead_Time

STATE_11_3

SET: TSV4:=0SET: TSV3:=1SET: TSV2:=1SET: TSV1:=0

STATE_11_2

SET: TSV4:=0SET: TSV3:=0SET: TSV2:=0SET: TSV1:=0DEL: DT1##Dead_Time

STATE_11_1

SET: TSV4:=1SET: TSV3:=0SET: TSV2:=0SET: TSV1:=1

TRIANG1

AMPL=1FREQ=Carrier_Freq

SINE1

AMPL=Modulation_IndexFREQ=Frequency

ICA:FML_INIT1

Modulation_Index:=0Carrier_Freq:=20kFrequency:=20k

DC_Source:=400Dead_Time:=2u

~

3PHAS

~

~

A * sin (2 * pi * f * t + PHI + phi_u)

PHI = 0°

PHI = -120°

PHI = -240°

THREE_PHASE1

D5

D6

D7

D8

D9

D10 Battery

- +

LBATT_A1

D11

D12

D13

D14

C2

1uF

2.00 2.20 2.40 2.60 2.80 3.00Time [ms]

-150.00

-100.00

-50.00

0.00

50.00

100.00

150.00

Y1

[A

]

Curve Info rms

WM1.ITR 41.6165

WM2.ITR 34.8648

2.00 2.20 2.40 2.60 2.80 3.00Time [ms]

-800.00

-300.00

200.00

700.00

Y1

[V

]

Curve Info rms

WM1.VTR 281.0066

WM2.VTR 321.9453

2.900 2.925 2.950 2.975 3.000Time [ms]

-250.00

-125.00

0.00

125.00

250.00

Y1

[A

]

-1000.00

-500.00

0.00

500.00

873.02

Y2

[V

]

MX1: 2.9200

MX2: 2.9811

-408.7847-315.0105-64.8250

-40.2840

-377.1247-319.5653 -53.6971

-0.0037

0.0610

Curve Info Y Axis rms

WM1.ITR Y1 38.9542

WM2.ITR Y1 34.1140

WM1.VTR Y2 276.0822

WM2.VTR Y2 316.6292

PWR

Probe

PWR_Probe1

Current_1:srcCurrent_2:src

Current_1:snkCurrent_2:snk

PWR

Probe

PWR_Probe2

0

0

0

R1

7.2mOhm

R2

3.6mOhm

Cs

1.72uF

Cp

4.96uF

Rload

13ohm

W

+WM1

W

+WM2

D4

D3

D2

D1

IGBT4

IGBT3

IGBT2

IGBT1

C1

1000uF

TRANS4

DT4

TRANS3

SINE1.VAL > TRIANG1.VAL

TRANS2

DT1

TRANS1

SINE1.VAL < TRIANG1.VAL

STATE_11_4

SET: TSV4:=0SET: TSV3:=0SET: TSV2:=0SET: TSV1:=0DEL: DT4##Dead_Time

STATE_11_3

SET: TSV4:=0SET: TSV3:=1SET: TSV2:=1SET: TSV1:=0

STATE_11_2

SET: TSV4:=0SET: TSV3:=0SET: TSV2:=0SET: TSV1:=0DEL: DT1##Dead_Time

STATE_11_1

SET: TSV4:=1SET: TSV3:=0SET: TSV2:=0SET: TSV1:=1

TRIANG1

AMPL=1FREQ=Carrier_Freq

SINE1

AMPL=Modulation_IndexFREQ=Frequency

ICA:FML_INIT1

Modulation_Index:=0Carrier_Freq:=20kFrequency:=20k

DC_Source:=400Dead_Time:=2u

~

3PHAS

~

~

A * sin (2 * pi * f * t + PHI + phi_u)

PHI = 0°

PHI = -120°

PHI = -240°

THREE_PHASE1

D5

D6

D7

D8

D9

D10 Battery

- +

LBATT_A1

D11

D12

D13

D14

C2

1uF

2.00 2.20 2.40 2.60 2.80 3.00Time [ms]

-150.00

-100.00

-50.00

0.00

50.00

100.00

150.00

Y1

[A

]

Curve Info rms

WM1.ITR 41.6165

WM2.ITR 34.8648

2.00 2.20 2.40 2.60 2.80 3.00Time [ms]

-800.00

-300.00

200.00

700.00

Y1

[V

]

Curve Info rms

WM1.VTR 281.0066

WM2.VTR 321.9453

2.900 2.925 2.950 2.975 3.000Time [ms]

-250.00

-125.00

0.00

125.00

250.00

Y1

[A

]

-1000.00

-500.00

0.00

500.00

873.02

Y2

[V

]

MX1: 2.9200

MX2: 2.9811

-408.7847-315.0105-64.8250

-40.2840

-377.1247-319.5653 -53.6971

-0.0037

0.0610

Curve Info Y Axis rms

WM1.ITR Y1 38.9542

WM2.ITR Y1 34.1140

WM1.VTR Y2 276.0822

WM2.VTR Y2 316.6292

PWR

Probe

PWR_Probe1

Current_1:srcCurrent_2:src

Current_1:snkCurrent_2:snk

PWR

Probe

PWR_Probe2

Simplorer/Maxwell State Space Model

Wireless Power Transformer Battery

Enabled by Maxwell eddy current matrix post processing

R14.5R15

Power transfer for moving car

© 2013 ANSYS, Inc. March 3, 201424 ANSYS Confidential & Proprietary Information

• New Visual Component Search engine

• Organization by use

• Context and component menu simplification

– 50% reduction in the number of commands

Simplorer 2014 includes major improvements to User Experience and Performance

© 2013 ANSYS, Inc. March 3, 201425 ANSYS Confidential & Proprietary Information

EelectromechanicalSystem Integration

New VHDL-AMS HEV Model Libray

Modelica FMI Links

© 2013 ANSYS, Inc. March 3, 201426 ANSYS Confidential & Proprietary Information

New VHDL-AMS HEV LibrariesAllow easy prototyping of automotive systems

© 2013 ANSYS, Inc. March 3, 201427 ANSYS Confidential & Proprietary Information

Links with Embedded and Modelica through FMI

Extending System Simulation Capabilities

© 2013 ANSYS, Inc. March 3, 201428 ANSYS Confidential & Proprietary Information

Links with Embedded and Modelica through FMI

Extending System Simulation Capabilities

© 2013 ANSYS, Inc. March 3, 201429 ANSYS Confidential & Proprietary Information