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EMC Simulation EMC Simulation of a SEPIC DC-DC Conducted Emissions and Radiated Emissions 2014 – 05 – 09
Leading Technical Expert "EMC Modeling & Simulation" EMC Validation Engineering / Simulation
QL RBG 23 Qualification Laboratory Regensburg
Public [email protected]
EMC Simulation Capabilities
2
EMC Simulation during Development
Development Process
Innovation and Roadmap
Quotation Concept Refinement
Develop-ment
Product Validation
Series Production
Analog simulation
Analog simulation 3D simulation PCB Signal integrity
3D simulation – PCB – Housing
3D simulation – PCB – Housing – Cable harness
IC / Component Schematic / PCB ECU System Level
Public [email protected]
Simulation of a Single-ended primary-inductor converter (SEPIC) DC-DC
› SEPIC DC-DC allows the electrical potential (voltage) at its output to be greater than, less than, or equal to its input.
› The output of the SEPIC is controlled by the duty cycle of the control transistor.
Agenda
› Design Studio Simulation: Functional Simulation DC-DC Converter
› Conducted Emissions Simulation
› Microwave Studio: Simulation of the PCB
› Cable Studio: Simulation of Wires
› Radiated Emissions Simulation
› Summery and Outlook
EMC Simulation: SEPIC DC-DC Simulation Tasks
3
Public [email protected]
EMC Simulation: SEPIC DC-DC Schematic Supplier Evaluation Board
4
Controller for Switching Regulators Load 18Ω / 5V
Battery13.5V
MOSFET
Diode
Public [email protected]
EMC Simulation: SEPIC DC-DC Schematic Design Studio
5
Battery_LISN
GND_LISN
Coil_1
1 3
2
Mosfet
Load
GND
Battery
1
2
13.5 V13.5 V
10 m10 m
5050
11'
L10UH_2062749.S1PL10UH_2062749.S1P
2
1
3 irf8707pbfirf8707pbf
1
2
1
2
0.050.05
12
1
1'
L10UH_2062749.S1PL10UH_2062749.S1P
Coil_1
Mosfet
1
1
2
1 2
ss1p4ss1p4
1 3
2
5050
11
Battery_LISN
n1_r_flry_0qmm50_1
n1_r_flry_0qmm50_2
n2_r_flry_0qmm50_1
n2_r_flry_0qmm50_2
Wire_L0m2_H50mm_Q0qmm50Wire_L0m2_H50mm_Q0qmm50
GND_LISN
Load
20cm Wire 1
2
Load
GND
R=18Ω
Battery
• Pspice Models • S-Parameter • R,L,C Components
Diode
MOSFET
EMC Setup: Conducted Emissions
Public [email protected]
› LISN: Line Impedance Stabilization Network
› A LISN is a low-pass filter typically placed between an AC or DC power source and the EUT (Equipment Under Test) to create a known impedance and to provide an RF noise measurement port.
EMC Simulation: SEPIC DC-DC LISN
6
5 u5 u
100 n100 n
1 u1 u
11
1 2
3
1 3
2
Public [email protected]
EMC Simulation: SEPIC DC-DC Voltage/Current at MOSFET and Output Voltage
7
Output Voltage: 5V
Public [email protected]
EMC Simulation: SEPIC DC-DC Conducted Emissions
10
1M 10M 100M-10
0
10
20
30
40
50
60
70
80
90
100
Frequency [Hz]
Inte
rfere
nce V
oltage L
evel [d
Bµ
V]
DS_wo_Filter_wo_Wire_2_LISN_Battery .txt_PK.mes
DS_wo_Filter_wo_Wire_2_LISN_Battery .txt_AV.mes
CISPR 25_class5_200803_CE_PK.lim
CISPR 25_class5_200803_CE_AV.lim
Conducted Emissions 2 LISN (BW 9KHz, 120kHz) Battery LISN 100kHz – 108MHz - CISPR 25 Limit (Peak/Average) - Simulation Peak - Simulation Average
Public [email protected]
EMC Simulation: SEPIC DC-DC DCDC Layout
11
DCDC Layout: Top DCDC Layout: Bottom
SEPIC DC-DC Layout: • 2 Layer • Eagle – Gerber – ODB++
Public [email protected]
EMC Simulation: SEPIC DC-DC DCDC Layout
12
1. Layout Import MWS 2. Ports Definition 3. F-Solver Simulation 4. Total Solver Time: 6792 s
(=1 h, 53m,12 s)
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Load
Diode
GND_LISN
1 (PCB_Input_VCC)
2 (PCB_Input_GND)
7 (C4)
3 (L_in)
8 (C3)
9 (C2)
10 (C1)
4 (PCB_Output_VCC)
5 (PCB_Output_GND)
18 (Cout_3)
17 (Lout)
16 (Cout_2)
15 (Cout_1)
11 (L
1)
6 (M
osfe
t)
19 (R
sen)
12 (C
S)
13 (L
2)
14 (D
1)
Battery_LISN
1 2
1 3
2
Battery
LISN10 m10 m
5050
1
213.5 V13.5 V
Battery_LISN
n1_r_flry_0qmm50_1
n1_r_flry_0qmm50_2
n2_r_flry_0qmm50_1
n2_r_flry_0qmm50_2
Wire_L0m2_H50mm_Q0qmm50_Wire_L0m2_H50mm_Q0qmm50_
VoltageVoltage
12
12
gatedr
ain
sour
ce IPD031N03M_L0IPD031N03M_L0
551
1 3
2
LISN
5050GND_LISN
1
L10UH_2062749.S1PL10UH_2062749.S1P
1
L10UH_2062749.S1PL10UH_2062749.S1P
1 2
ss1p4ss1p4
1
2
100 k100 k
0.050.05
1 n1 n
1 2Load
Load_GNDLoad_GND
Diode
EMC Simulation: SEPIC DC-DC DCDC Simulation with Layout in Design Studio
13
EMC Setup: Conducted Emissions
Load R=18Ω
Public [email protected]
100k 1M 10M 100M-20
0
20
40
60
80
100
Frequency [Hz]
Inte
rfere
nce
Vol
tage
Lev
el [d
BµV
]
Simulation_Battery _LISN.txt_Cutted_PK.mes
CISPR25 5 CE PK.limCISPR25 5 CE PK.lim
EMC Simulation: SEPIC DC-DC Conducted Emissions
14
Conducted Emissions 2 LISN (BW 9KHz, 120kHz) Battery LISN 100kHz – 108MHz - CISPR 25 Limit - Simulation Peak - Measurement Peak
Note: Offset due to FFT window function?
Public [email protected]
100k 1M 10M 100M-20
0
20
40
60
80
100
Frequency [Hz]
Inte
rfere
nce
Vol
tage
Lev
el [d
BµV
]
Simulation_Battery _LISN.txt_Cutted_PK.mes
CISPR25 5 CE AV.limCISPR25 5 CE AV.lim
EMC Simulation: SEPIC DC-DC Conducted Emissions
15
Conducted Emissions 2 LISN (BW 9KHz, 120kHz) Battery LISN 100kHz – 108MHz - CISPR 25 Limit - Simulation Average - Measurement Average
Public [email protected]
EMC Simulation: SEPIC DC-DC DCDC Simulation with Layout in Design Studio
16
2m cable harness
EMC Setup: Conducted Emissions
Load R=18Ω
Public [email protected]
100k 1M 10M 100M-20
0
20
40
60
80
100
Frequency [Hz]
Inte
rfere
nce
Vol
tage
Lev
el [d
BµV
]
Simulation_Wire_Battery _LISN_wire.txt_PK.mes
CISPR25 5 CE PK.limCISPR25 5 CE PK.lim
EMC Simulation: SEPIC DC-DC Conducted Emissions
18
Conducted Emissions 2 LISN (BW 9KHz, 120kHz) Battery LISN 100kHz – 108MHz - Peak, CISPR 25 Limit - Simulation - Measurement
Public [email protected]
100k 1M 10M 100M-20
0
20
40
60
80
100
Frequency [Hz]
Inte
rfere
nce
Vol
tage
Lev
el [d
BµV
]
AV-2LISN_PCB3_Nr10.mesAV-2LISN_PCB3_Nr10.mes
CISPR25 5 CE AV.lim
EMC Simulation: SEPIC DC-DC Conducted Emissions
19
Conducted Emissions 2 LISN (BW 9KHz, 120kHz) Battery LISN 100kHz – 108MHz - Average, CISPR 25 Limit - Simulation - Measurement
Public [email protected]
EMC Simulation: SEPIC DC-DC Radiated Emissions Simulation: Monopole Setup
20
Standard Test Setup: • Harness length: 2m • Harness height: 5cm • Harness Twisted
Monopole Antenna
Cable Harness
Public [email protected]
100k 1M 10M-20
-10
0
10
20
30
40
50
60
70
80
Frequency [Hz]
Inte
rfere
nce
Vol
tage
Lev
el [d
BµV
]
PK-RE30MHz__2LISN_PCB1_Nr1.mes
Antenna.txt_Cutted_PK.mes
EMC Simulation: SEPIC DC-DC Radiated Emissions
21
Simulation Measurement
Radiated Emissions 2 LISN (BW 9KHz, 120kHz) Battery LISN 100kHz – 108MHz - Simulation - Measurement
Note: Resonance Measurement Setup
Public [email protected]
EMC Simulation: SEPIC DC-DC Summary and Outlook
22
Time Domain Simulation in Design Studio works
Time Domain Simulation with Layout and Wire Harness possible
Conducted and Radiated Emissions shows good comparability
Summary
Challenging Setup of different GUI and Solver
Increased speed of time domain Simulations in Design Studio?
Stability Design Studio
Outlook
Public [email protected]
Felix Müller
Leading Technical Expert "EMC Modeling & Simulation" EMC Validation Engineering / Simulation
Qualification Laboratory Regensburg
Thank you for your Attention
23
Public [email protected]
EMC Simulation: SEPIC DC-DC EMI Test Receiver CISPR 16-1-1
24
EMI Test Receiver: Detectors
IF-SignalEnvelope-Detector Peak
Average
Quasi-peak
Detectors
U
U
U
t
t
t
