emc 2016: international symposium on electromagnetic ... · 1 emc 2016: international symposium on...

1

EMC 2016: International

Symposium on Electromagnetic

Compatibility and

EMC Europe

September 09th, 2016, Wroclaw

Dr. Jean-Roger K. Kuvedu-Libla Delphi – Electronics & Safety

Bascharage, Luxembourg

[email protected]

Simple Decoupling and Coupling Strategies of Electromagnetic Disturbances

from/on Cable Harnesses when using Automotive Component Testing Methods

- EMC Europe Wroclaw 2016 -

2

Outline

I Motivations and Backgrounds

II Contents

III Conclusions

IV Questions

Simple Decoupling and Coupling Strategies of Electromagnetic

Disturbances from/on Cable Harnesses when using Automotive

Component Testing Methods




3


II Contents

III Conclusions

a) Expecting Benefits

b) Expecting Drawbacks


Disturbances from/on Cable Harnesses when using

Automotive Component Testing Methods

IV Questions

a) Why investigating “Decoupling and Coupling Strategies of Electromagnetic Disturbances”?

b) Where are the benefits and challenges?

c) Objectives and Requests?

a) Particularities of Electromagnetic Coupling / Decoupling

b) Definitions of Coupling / Decoupling

c) Theoretical Backgrounds of Coupling / Decoupling

d) EMC Requirements




4








5


Why investigating “Decoupling and Coupling of Electromagnetics”?

a) Several main motives Safety & Reliability Demands for Vehicles &

Automotive Component Test Methods

That means Repeatable Conditions for

Vehicles & Automotive Component Test Methods

b) Key Contribution Parts needed?

Cable Harness

Ground Plane & Chassis & Housing

Particularities of “Return Lines” of Harnesses

c) Example of Application Parameters?

Figure 1-1: Examples of Coupling on the Harnesses




Inductive

Load

Resistive

Load

𝐿𝑛𝑚′ in

mH

of Lines

Sensor- &

Signal Lines

𝐶𝑛𝑛’ in µF

Wire to

Ground Plane

𝐿𝑛𝑚′ in µH

of Lines

𝐶𝑛𝑚’ in µF

Wire to Wire

Capacitive

Load

6


Why investigating “Decoupling and Coupling of Electromagnetics”?

a) Several main motives Safety & Reliability Demands for Vehicles &

Automotive Component Test Methods

That means Repeatable Conditions for

Vehicles & Automotive Component Test Methods

b) Key Contribution Parts needed?

Cable Harness

Ground Plane & Chassis & Housing

Particularities of “Return Lines” of Harnesses

c) Example of Application Parameters?

Figure 1-2: Examples of Coupling Model




C11 C22 C33

C13

C23 C12

Ground Plane Ground Plane

C11 C22 Cnn …..

C1n

a) 3-Wires Harnesses b) n-Wires Harnesses

7





Where are the benefits and challenges?

a) Understanding of Coupling /

Decoupling Capacitances

respectively Parameters

Geometry Dependences

Frequency Dependences

b) Big Challenges:

Analytic Expression of the

Harnesses & Ground Plane &

Chassis

Matrix Forms

Coupling of Kind of Disturbances

(Common / Differential Modes)

Figure 1-3: Examples of Coupling Model

a) Sensor- and Signal Lines

b) Power Lines

-20

0

20

40

60

80

100

Level [dBµV]

100k200k 400k 1M 2M 3M 5M7M10M 20M30M 50M 108M

Frequency [Hz]

MES 11DE01_PosPk61 MES 11DE01_PosAv61 LIM B217110C_CEAv B21 7110 Rev C - Average limitLIM B217110C_CEPk B21 7110 Rev C - Peak limit

5.6

10.0

15.0

20.0

25.0

30.0

32.2

Level [dBµV/m]

200M 250M 300M 350M 400M 448.4M

Frequency [Hz]

MES 11DE01_lvAv1 LIM B217110C_REAv B21 7110 Rev C - Average limitLIM B217110C_REPk B21 7110 Rev C - Peak limit

Harness

Ground Pane

L’

C’

G’

R’

Repeatable?


Objectives and Requests (1) - Challenging Decoupling / Coupling? Complexities of the Source functions (Common Modes &

Differential Modes) Complexities of Cables Harnesses (Sensor- & Signal Lines &

Power Lines)

- Challenging of Measurement Understanding? Practice Experience Data Theoretical Descriptions (Mathematical / Analytical)

Challenges for Frequencies f 100kHz (Broadband Ranges)

- Consequences of Decoupling / Coupling? Repeatability Conditions (Component & Vehicle Level)

Where is the optimal positions of the harness wires TEM-Mode Wave Propagation Assumption

8

?




9

II Contents







10

II Contents

Particularities of Electromagnetic Decoupling / Coupling

Figure 2-1: Example of Decoupling / Coupling Sources showing the Measurements Simple Decoupling and Coupling Strategies of Electromagnetic Disturbances



-20

0

20

40

60

80

100

Level [dBµV]

100k200k 400k 1M 2M 3M 5M7M10M 20M30M 50M 108M

Frequency [Hz]

MES 11DE01_PosPk61 MES 11DE01_PosAv61 LIM B217110C_CEAv B21 7110 Rev C - Average limitLIM B217110C_CEPk B21 7110 Rev C - Peak limit

3.75.0

10.0

15.0

20.0

25.0

30.0

35.0

Level [dBµV/m]

134.6M 150M 160M 170M 180M 190M 200M

Frequency [Hz]

MES 11DE01_bvPk1 MES 11DE01_bvAv1 MES 11DE01_rPk7 MES 11DE01_rAv7 LIM B217110C_REAv B21 7110 Rev C - Average limitLIM B217110C_REPk B21 7110 Rev C - Peak limit

0

10

20

30

40

50

60

70

80

Level [dBµV]

150k300k500k 1M 2M 3M4M 6M 10M 20M30M 50M 108M

Frequency [Hz]

MES 11JN02_Pk2 LIM CISPR25_Con_BB_5_Pk (Broadband Class 5)

5.6

10.0

15.0

20.0

25.0

30.0

32.2

Level [dBµV/m]

200M 250M 300M 350M 400M 448.4M

Frequency [Hz]

MES 11DE01_lvAv1 LIM B217110C_REAv B21 7110 Rev C - Average limitLIM B217110C_REPk B21 7110 Rev C - Peak limit

a) Conducted b) Radiated

Repeatable?

11

II Contents





a) Conducted b) Radiated

Figure 2-2: Example of Emission Test Setups

DUT

LISN

Harness

(Signal / Sensors)

12V Battery

Supply

Periphery

Measuring

Receiver

h = 5cm

Ground Plane

Supply Lines

Periphery

LISN

12V Battery

Supply

DUT

Measuring

Antenna

h = 5cm

Harness

(Signal / Sensors)

Ground Plane

12

II Contents


Figure 2-3: Example of Decoupling / Coupling Sources /

Parameters

a) Coupling / Coupling Parameters?

Frequency dependences:

- Electric ~ 𝜀

- Magnetic ~ 𝜇

- Electromagnetic 𝜀, 𝜇

b) Reference Point / Plane?

Ground Plane

Return Lines

c) Hereby Electromagnetic Parameters?

Expressions:

- Matrix C’

- Matrix L’

- Matrix of Wave Impedance Zw




Inductive

Load

Resistive

Load

𝐿𝑛𝑚′ in mH

of Lines

Sensor- &

Signal Lines

𝐶𝑛𝑛’ in µF

Wire to

Ground Plane

𝐿𝑛𝑚′ in µH

of Lines

𝐶𝑛𝑚’ in µF

Wire to Wire

Capacitive

Load

13

II Contents

Definitions of Electromagnetic Decoupling / Coupling




a) Decoupling / Coupling in the

Harnesses?

Decoupling / Coupling Harness to Ground

Plane (Diagonal Elements)

Decoupling / Coupling Harness Wires to

Harness Wires (Cross Diagonal Elements)

b) The Test Setup Ensures TEM-Wave

Propagations

That means: Matrix C’ and Matrix L’ are

binding thru the wave propagation speed c

(𝑓𝑜𝑟 𝑓𝑟𝑒𝑒 𝑠𝑝𝑎𝑐𝑒 𝑐0)

C11 C22 C33

C13

C23 C12

Ground Plane

h'

d

Ground Plane

C11 C22 Cnn …..

Cnm

h

d

Figure 2-4: Model to express the Decoupling / Coupling

Harness

14

II Contents

Theoretical Backgrounds of Electromagnetic Decoupling / Coupling?




a) Analytical Decoupling / Coupling

Description of the Harnesses?

Using the canonic Basic for the Description of

Matrices:

- Matrix C’

- Matrix L’

- Matrix Wave Impedance Zw


Propagations

That means: Matrix C’ Elements are:

𝑗𝜔𝐶𝑛𝑚′ =𝑗𝜔𝐶11′ ⋯ 𝑗𝜔𝐶1𝑚′

⋮ ⋱ ⋮𝑗𝜔𝐶𝑛1′ ⋯ 𝑗𝜔𝐶𝑛𝑚′

n- Wire Systems

3- Wire Systems

𝑗𝜔𝐶3𝑥3′ =

𝑗𝜔𝐶11′ 𝑗𝜔𝐶12′ 𝑗𝜔𝐶13′



𝑪𝒏𝒎’ = 𝟐𝝅𝜺

𝒍𝒏𝒅

𝟐𝒉

with 𝒏 = 𝒎

𝑪𝒏𝒎’ = 𝟐𝝅𝜺

𝒍𝒏𝒅

𝟐𝒉′

with 𝒏 ≠ 𝒎

15

II Contents







Using the canonic Basic for the Matrices:

- Matrix C’

- Matrix L’



Propagations

That means: Matrix L’ Elements are

𝑗𝜔𝐿𝑛𝑚′ =𝑗𝜔𝐿11′ ⋯ 𝑗𝜔𝐿1𝑚′

⋮ ⋱ ⋮𝑗𝜔𝐿𝑛1′ ⋯ 𝑗𝜔𝐿𝑛𝑚′

n- Wire Systems

3- Wire Systems

𝑗𝜔𝐿3𝑥3′ =

𝑗𝜔𝐿11′ 𝑗𝜔𝐿12′ 𝑗𝜔𝐿13′



𝑳𝒏𝒎’ = 𝟏

𝟐𝝅∙𝜺𝟎∙𝒄𝟎𝟐 ∙ 𝒍𝒏

𝟐𝒉

𝒅 with 𝒏 = 𝒎

𝑳𝒏𝒎’ = 𝟏

𝟐𝝅∙𝜺𝟎∙𝒄𝟎𝟐 ∙ 𝒍𝒏

𝟐𝒉′

𝒅 with 𝒏 ≠ 𝒎

16

II Contents








- Matrix C’

- Matrix L’


b) The Test Setup Ensures TEM-Wave Propagations

That means: Elements of Matrix Zw

𝑍𝑤,𝑛𝑚 =

𝑍𝑤,11 ⋯ 𝑍𝑤,1𝑚

⋮ ⋱ ⋮𝑍𝑤,𝑛1 ⋯ 𝐿𝑤,𝑛𝑚

n- Wire Systems

3- Wire Systems

𝑍𝑤,3𝑥3 =

𝑍𝑤,11 𝑍𝑤,12 𝑍𝑤,13

𝑍𝑤,21′ 𝑍𝑤,22 𝑍𝑤,23

𝑍𝑤,31 𝑍𝑤,23 𝑍𝑤,33

Zw,nm =

𝝁

𝜺 =

𝑹′+𝒋𝝎𝑳′

𝑮′+𝒋𝝎𝑪′

For R’ ≈ 𝟎 and G’ ≈ 𝟎 and 𝑳𝒏𝒎′ ∙ 𝑪𝒏𝒏

′ =𝝁𝒓′∙𝜺𝒓′

𝒄𝟎𝟐

𝝁𝒓 = 𝝁𝒓′ + 𝒋𝝎𝝁𝒓′′ ; 𝜺𝒓 = 𝜺𝒓′ + 𝒋𝝎𝜺𝒓′′ ; 𝝁𝒓

′′ = 𝟎; 𝜺𝒓′′ = 𝟎

Zw, stat,nm = 𝝁′

𝜺′ =

𝑳′

𝑪′

17

II Contents





Example of Matrix C’

b) Examples for Matrix L’:


- Matrix C’

- Matrix L’


That means: Matrix C’ Elements are for the

distance h above the Ground Plane (h ≥ 25𝑚𝑚):

3- Wire Systems

3- Wire Systems

𝐶3𝑥3′ ≈ 15 47 4747 15 47

47 47 15 in pF/m

𝐶3𝑥3′ = 15.3 47.2 47.2

47.2 15.3 47.247.2 47.2 15.3

in pF/m

Approximately

18

II Contents





Example of Matrix L’

b) Examples for Matrix L’:


- Matrix C’

- Matrix L’


That means: Matrix L’ Elements are for the


3- Wire Systems

3- Wire Systems

𝐿3𝑥3′ ≈ 1.4 0.44 0.44

0.44 1.4 0.440.44 0.44 1.4

in µH/m

𝐿3𝑥3′ = 1.36 0.44 0.44

0.44 1.36 0.44

0.44 0.44 1.36 in µH/m

Approximately

19

II Contents





c) Examples for Matrix Zw:


- Matrix C’

- Matrix L’


That means: Matrix Zw Elements are for the


3- Wire Systems

3- Wire Systems

𝑍3𝑥3 ≈ 300 100 100

100 300 100

100 100 300

in Ω

𝑍3𝑥3 = 298.48 98.32 98.32

98.32 298.48 98.32

98.32 98.32 298.48

in Ω

Approximately

Example of Matrix Zw

II Contents

20 Simple Decoupling and Coupling Strategies of Electromagnetic Disturbances



EMC Requirements? a) Test Set Up Parameters?

Harness:

Variable h: 0.35mm … 100mm (Matrix

Diagonal)

Variable h: 0.69mm … 100mm (Matrix Cross

Diagonal)

Reference h for Impedance Matrix: h < 25mm;

h=50mm; h>50mm

Fixed Parameter d: 0.69mm (Wire Diameter

for Diagonal)

Fixed Parameter d’: 0.69mm (Wire Diameter

for Cross Diagonal)

Nature Constant:

𝜀0 = 8.854187817 ∙ 10−12 in As/Vm;

𝜀𝑟 = 1; 𝜇𝑟 = 1; 𝑐0 = 3 ∙ 108 in m/s

Figure 2-5: Model showing Geometries and Material Constants

C11’ C22’ C33’

C13’

C23’ C12’

Ground Plane

h'

d

𝝁

𝜺

Ground Plane

C11’ C22’ Cnn’ …..

Cnm’

h

d

𝝁

𝜺

II Contents

Figure 2-3: Example of Decoupling / Coupling “Factor”

21 Simple Decoupling and Coupling Strategies of Electromagnetic Disturbances



EMC Requirements?

a) Diagonal Impedance 𝑍𝑤,𝑛𝑛 b) Diagonal Capacitance 𝐶𝑛𝑛

Cap

acit

ance

Dia

go

nal

Cnn i

n 1

02p

F

Distance Wire to Ground Plane h in m

Ind

uct

ance

Dia

go

nal

Lnn i

n 1

0−

1𝜇

H


Imp

edan

ce D

iago

nal

Znn i

n Ω


Interesting Interval

for repeatability

0.05 0.025

c) Diagonal Inductance 𝐿𝑛𝑛

a)

c)

b)

II Contents

Figure 2-4: Example of Decoupling / Coupling “Factor” 22 Simple Decoupling and Coupling Strategies of Electromagnetic Disturbances



EMC Requirements?

a) Cross Diagonal Impedance 𝑍𝑤,𝑛𝑛 b) Cross Diagonal Capacitance 𝐶𝑛𝑛 c) Cross Diagonal Inductance 𝐿𝑛𝑛

c)

Imp

edan

ce C

ross

Dia

go

nal

Znn i

n Ω

Distance Wire to Wire h in mm Distance Wire to Wire h in mm

Distance Wire to Wire h in mm

Ind

uct

ance

Cro

ss D

iago

nal

Lnn i

n 𝜇

H

Cap

acit

ance

Cro

ss D

iago

nal

Cnn i

n 1

02p

F

a)

b)

23

III Conclusions







24

III Conclusions

Wrap Up 1 What are the topics? Decoupling and Coupling Strategies of

Electromagnetic Disturbances from/on

Cable Harnesses

2 What are the Expecting Benefits? Not only Safety & Reliability in Designs &

Test Methods Better understanding of Designs, Test Methods and Model of Decoupling / Coupling Mechanism

3 Current Benefits: h ≈ 25mm between harness wires to

Ground Plane / Return Lines give the

reference point for Decoupling/Coupling h > 25mm for better Measurement Repeatable

4 What are the Challenges: Better Achievement of Decoupling/Coupling

when using Automotive Test Methods

5 Current Drawbacks: Analytical descriptions of “Decoupling/

Coupling” Matrix not always simple but

simple when using canonic Basic




25

IV Questions







26

IV Questions




emc 2016: international symposium on electromagnetic ... · 1 emc 2016: international symposium on...

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