Investigation of Electromagnetic Field Coupling from DC-DC Buck ...
iMAPS New England 43rd Symposium & Expo
Investigation of Electromagnetic Field Coupling from DC-DC Buck Converters to
Automobile AM/FM Antennas
Patrick DeRoy, CST of America, Framingham, Massachusetts, USA Andreas Barchanski, CST AG, Darmstadt, Germany
Cyrous Rostamzadeh, Bosch, Plymouth, Michigan, USA Behrouz Abdolali, Crouse, Tehran, Iran
CST ? COMPUTER SIMULATION TECHNOLOGY |
Outline
Introduction and Motivation ? SMPS EMI CISPR25 RE Test and Nearfield Probe Measurements Buck Converter Operation and RF Current Paths
? Time Domain Waveforms, Parasitic Inductances and Loop Inductance Calculations
AM Band Noise and Mitigation
? Effect of Shielding, Electric and Magnetic Shields
Glass Antennas and Vehicle Level Measurements
? Near field coupling interaction
Computational Modeling and Analysis Summary and Q&A
CST ? COMPUTER SIMULATION TECHNOLOGY |
Modern Automobile = Complex Electromagnetic Environment
? keyless entry
? toll collect system
? garage opener
? vehicle detection
? remote for block heater ? wireless charging
? tire pressure monitoring ? car alarm
? automotive radar
GPS, Galileo, Glonass, Iridium, Globalstar
ISM band ISM band
SDARS
2m band Tetra DVB-T GSM 850/900
long wave radio AM,DRM
short wave radio AM,DRM
radio clock DCF 77
medium wave radio AM,DRM
4m band CB radio
Orbcomm FM radio
Radio DAB
LTE
UMTS
DSRC
GSM 1800/1900 LTE
Bluetooth, WLAN, Zigbee
WLAN DAB-L
Car2Car Satellite TV
A modern car contains 20-30 Antennas!
100 kHz
1 MHz
10 MHz
100 MHz
1 GHz
10 GHz
CST ? COMPUTER SIMULATION TECHNOLOGY |
Switched Mode Power Supply EMI
Power Electronics designers require a deep breadth of knowledge ? circuit design, magnetics, semiconductor devices, thermal management, control theory, PCB layout, EMI... EMI continues to be a major problem! Especially for Switched Mode Power Supply (SMPS) devices Concepts well known, yet it can still be difficult to pass EMC regulations ? and it's only getting more difficult
CST ? COMPUTER SIMULATION TECHNOLOGY |
CISPR25 Radiated Emissions Test
CST ? COMPUTER SIMULATION TECHNOLOGY |
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