1 EMC 2016: International Symposium on Electromagnetic Compatibility and EMC Europe September 09 th , 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 -
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1
EMC 2016: International
Symposium on Electromagnetic
Compatibility and
EMC Europe
September 09th, 2016, Wroclaw
Dr. Jean-Roger K. Kuvedu-Libla Delphi – Electronics & Safety
Where is the optimal positions of the harness wires TEM-Mode Wave Propagation Assumption
8
?
Simple Decoupling and Coupling Strategies of Electromagnetic Disturbances
from/on Cable Harnesses when using Automotive Component Testing Methods
- EMC Europe Wroclaw 2016 -
9
II Contents
Simple Decoupling and Coupling Strategies of Electromagnetic Disturbances
from/on Cable Harnesses when using Automotive Component Testing Methods
- EMC Europe Wroclaw 2016 -
Simple Decoupling and Coupling Strategies of Electromagnetic
Disturbances from/on Cable Harnesses when using
Automotive Component Testing Methods
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
from/on Cable Harnesses when using Automotive Component Testing Methods
- EMC Europe Wroclaw 2016 -
-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
Particularities of Electromagnetic Decoupling / Coupling
Simple Decoupling and Coupling Strategies of Electromagnetic Disturbances
from/on Cable Harnesses when using Automotive Component Testing Methods
- EMC Europe Wroclaw 2016 -
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
Particularities of Electromagnetic Decoupling / Coupling
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
Simple Decoupling and Coupling Strategies of Electromagnetic Disturbances
from/on Cable Harnesses when using Automotive Component Testing Methods
- EMC Europe Wroclaw 2016 -
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
Simple Decoupling and Coupling Strategies of Electromagnetic Disturbances
from/on Cable Harnesses when using Automotive Component Testing Methods
- EMC Europe Wroclaw 2016 -
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?
Simple Decoupling and Coupling Strategies of Electromagnetic Disturbances
from/on Cable Harnesses when using Automotive Component Testing Methods
- EMC Europe Wroclaw 2016 -
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
b) The Test Setup Ensures TEM-Wave
Propagations
That means: Matrix C’ Elements are:
𝑗𝜔𝐶𝑛𝑚′ =𝑗𝜔𝐶11′ ⋯ 𝑗𝜔𝐶1𝑚′
⋮ ⋱ ⋮𝑗𝜔𝐶𝑛1′ ⋯ 𝑗𝜔𝐶𝑛𝑚′
n- Wire Systems
3- Wire Systems
𝑗𝜔𝐶3𝑥3′ =
𝑗𝜔𝐶11′ 𝑗𝜔𝐶12′ 𝑗𝜔𝐶13′
𝑗𝜔𝐶21′ 𝑗𝜔𝐶22′ 𝑗𝜔𝐶23′
𝑗𝜔𝐶31′ 𝑗𝜔𝐶23′ 𝑗𝜔𝐶33′
𝑪𝒏𝒎’ = 𝟐𝝅𝜺
𝒍𝒏𝒅
𝟐𝒉
with 𝒏 = 𝒎
𝑪𝒏𝒎’ = 𝟐𝝅𝜺
𝒍𝒏𝒅
𝟐𝒉′
with 𝒏 ≠ 𝒎
15
II Contents
Theoretical Backgrounds of Electromagnetic Decoupling / Coupling?
Simple Decoupling and Coupling Strategies of Electromagnetic Disturbances
from/on Cable Harnesses when using Automotive Component Testing Methods
- EMC Europe Wroclaw 2016 -
a) Analytical Decoupling / Coupling
Description of the Harnesses?
Using the canonic Basic for the Matrices:
- Matrix C’
- Matrix L’
- Matrix Wave Impedance Zw
b) The Test Setup Ensures TEM-Wave
Propagations
That means: Matrix L’ Elements are
𝑗𝜔𝐿𝑛𝑚′ =𝑗𝜔𝐿11′ ⋯ 𝑗𝜔𝐿1𝑚′
⋮ ⋱ ⋮𝑗𝜔𝐿𝑛1′ ⋯ 𝑗𝜔𝐿𝑛𝑚′
n- Wire Systems
3- Wire Systems
𝑗𝜔𝐿3𝑥3′ =
𝑗𝜔𝐿11′ 𝑗𝜔𝐿12′ 𝑗𝜔𝐿13′
𝑗𝜔𝐿21′ 𝑗𝜔𝐿22′ 𝑗𝜔𝐿23′
𝑗𝜔𝐿31′ 𝑗𝜔𝐿23′ 𝑗𝜔𝐿33′
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
Theoretical Backgrounds of Electromagnetic Decoupling / Coupling?
Simple Decoupling and Coupling Strategies of Electromagnetic Disturbances
from/on Cable Harnesses when using Automotive Component Testing Methods
- EMC Europe Wroclaw 2016 -
a) Analytical Decoupling / Coupling
Description of the Harnesses?
Using the canonic Basic for the Matrices:
- Matrix C’
- Matrix L’
- Matrix of Wave Impedance Zw
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
Simple Decoupling and Coupling Strategies of Electromagnetic Disturbances
from/on Cable Harnesses when using Automotive Component Testing Methods
- EMC Europe Wroclaw 2016 -
Theoretical Backgrounds of Electromagnetic Decoupling / Coupling?
Example of Matrix C’
b) Examples for Matrix L’:
Using the canonic Basic for the Matrices:
- Matrix C’
- Matrix L’
- Matrix Wave Impedance Zw
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
Simple Decoupling and Coupling Strategies of Electromagnetic Disturbances
from/on Cable Harnesses when using Automotive Component Testing Methods
- EMC Europe Wroclaw 2016 -
Theoretical Backgrounds of Electromagnetic Decoupling / Coupling?
Example of Matrix L’
b) Examples for Matrix L’:
Using the canonic Basic for the Matrices:
- Matrix C’
- Matrix L’
- Matrix Wave Impedance Zw
That means: Matrix L’ Elements are for the
distance h above the Ground Plane (h ≥ 25𝑚𝑚):
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
Theoretical Backgrounds of Electromagnetic Decoupling / Coupling?
Simple Decoupling and Coupling Strategies of Electromagnetic Disturbances
from/on Cable Harnesses when using Automotive Component Testing Methods
- EMC Europe Wroclaw 2016 -
c) Examples for Matrix Zw:
Using the canonic Basic for the Matrices:
- Matrix C’
- Matrix L’
- Matrix of Wave Impedance Zw
That means: Matrix Zw Elements are for the
distance h above the Ground Plane (h ≥ 25𝑚𝑚):
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
from/on Cable Harnesses when using Automotive Component Testing Methods
- EMC Europe Wroclaw 2016 -
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
from/on Cable Harnesses when using Automotive Component Testing Methods
- EMC Europe Wroclaw 2016 -
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
Distance Wire to Ground Plane h in m
Imp
edan
ce D
iago
nal
Znn i
n Ω
Distance Wire to Ground Plane h in m
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
from/on Cable Harnesses when using Automotive Component Testing Methods
- EMC Europe Wroclaw 2016 -
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
Simple Decoupling and Coupling Strategies of Electromagnetic Disturbances
from/on Cable Harnesses when using Automotive Component Testing Methods
- EMC Europe Wroclaw 2016 -
Simple Decoupling and Coupling Strategies of Electromagnetic
Disturbances from/on Cable Harnesses when using
Automotive Component Testing Methods
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
Simple Decoupling and Coupling Strategies of Electromagnetic Disturbances
from/on Cable Harnesses when using Automotive Component Testing Methods
- EMC Europe Wroclaw 2016 -
25
IV Questions
Simple Decoupling and Coupling Strategies of Electromagnetic Disturbances
from/on Cable Harnesses when using Automotive Component Testing Methods
- EMC Europe Wroclaw 2016 -
Simple Decoupling and Coupling Strategies of Electromagnetic
Disturbances from/on Cable Harnesses when using
Automotive Component Testing Methods
26
IV Questions
Simple Decoupling and Coupling Strategies of Electromagnetic Disturbances
from/on Cable Harnesses when using Automotive Component Testing Methods