EMI/EMC in Power Electronics (2024)
Doctoral School of Engineering and Science at Aalborg University
Organizer: Associate Prof. Pooya Davari, pda@energy.aau.dk, Aalborg University
Lecturers: Professor Eckart Hoene - Aalborg University and Fraunhofer IZM,
Dr. Christian Wolf, Lead Specialist, EMC & Power Electronics - Grundfos Holding A/S,
Associate Professor Pooya Davari - Aalborg University
ECTS: 2
Date/Time: November 14 -15, 2024
Deadline: 21 Oktober 2024
Place: AAU Energy, Pontoppidanstraede, Aalborg, Denmark
Format: in person
Max no. of participants: 20
Short description: This course will focus on design for EMC in power electronics converters to prevent and minimize power converters electromagnetic interference (EMI) from disturbing their own operation and other nearby electronic devices.
Description: With a rapid advancement of power switching devices and digital signal processing units, power electronics technology has found its way into many applications of renewable energy generation, transmission, and consumption. Although power electronics systems are a key enabler as a cross-functional technology in the energy conversion process, their pulse energy conversion with inherent switching behavior exhibit disturbing harmonic emissions and electromagnetic noises. Recently, with the high penetration of power electronic systems and advent of new power semiconductor devices known as wide-band gap (WBG) the importance of understanding and preventing power converters switching disturbances have significantly elevated. The generated harmonic and noise disturbances can result in electromagnetic interference (EMI) and should be controlled within specific limits by applying proper filtering, topology, and control scheme. Thereby, to prevent the power converters from disturbing their own operation and other nearby electronic devices they should design for electromagnetic compatibility (EMC). The emphasis of this course is to give a complete and clear picture on EMI issues and mitigation methodologies. Systematic designing of passive EMI filters for differential mode (DM) and common mode (CM) noises in single-phase and three-phase systems will be provided. Printed circuit board (PCB) design criteria, passive and active components parasitic and shielding approaches in reducing near-field couplings will be covered as well. Furthermore, time and frequency domain modeling of conducted low and high frequency emission noises through developing equivalent circuit models of power electronics converters to reduce the analysis complexity and prevent from conventional trial and error design approach will be addressed. This course will also focus on new challenges within the new frequency band of 2-150 kHz in power electronic based power systems. The course content is combined with real-world application examples and demonstration. In the first day the course will focus on basics of harmonics generated by switching, EMI issues in PWM converters, components parasitic, measurement requirement, interference mechanisms, filtering component and strategy. In the second day there will be more focus on advanced topics such as magnetic coupling, EMI prediction, Shielding and new standard requirements. The second day will be supported with industrial examples and real-world design experience regarding different aspects of EMI/EMC in power electronics.
Day1: EMI Prediction and Filtering in Power Converters
· 08:45 – 11:30 Topic1: EMI Issues and Measurement in PWM Converters (Basics) [Pooya Davari]
o 08:45 – 09:30 Disturbances Generated by Switching
· 09:30 – 09:40 Break
o 09:40 – 10:40 Components Parasitic
· 10:40 – 10:50 Break
o 10:50 – 11:30 Measurement requirement
· 11:30 – 12:15 Lunch
o 12:15-13:00 Topic2: Interference Generation [Pooya Davari and Eckart Hoene]
· 13:00 – 13:10 Break
o 13:10-14:10 Topic3: Filtering Components and Strategy [Pooya Davari]
· 14:10 – 14:20 Break
o 14:20 – 14:50 Topic4: Filtering Components (Advanced) [Eckart Hoene]
· 14:50 – 15:00 Break
o 15:00 – 16:00 Topic5: Prediction [Eckart Hoene]
o MINI PROJECTS (16:00 – 17:00)
Day2: EMI Mechanisms and EMC Design Strategy in Power Electronics
· 08:30 – 09:00 Topic6: Mechanisms [Eckart Hoene and Pooya Davari]
o 09:00 – 09:45 Topic7: Design Strategies for Power Electronic Devices [Eckart Hoene]
· 09:45 – 10:00 Break
o 10:00 – 10:45 MINI PROJECTS: 45 min presentation from groups [Students]
o 10:45-11:15 Topic8: New 2- 150 kHz Frequency Range Standard [Pooya Davari]
o 11:15-12:00 Topic9: Overview: EMC Design of Drive Systems (Eckart Hoene]
· 12:00 – 12:45 Lunch
o 12:45-13:30 Topic10: EMC Demonstrator [Christian Wolf]
o 12:45-13:15 EMC Demonstrator Conducted Mode
o 13:15-13:30 EMC Demonstrator Radiated Mode
· 13:30 – 13:40 Break
o 13:40-14:00 Topic11: Resonance Phenomenon [Christian Wolf]
o 14:00-14:30 Topic12: EMC filters and mechanical layout [Christian Wolf]
· 14:30 – 14:40 Break
o 14:40-15:20 Topic13: Crosstalk – Ground plane [Christian Wolf]
· 15:20 – 15:30 Break
o 15:30-16:00 Topic14: SMPS and layout [Christian Wolf]
o 16:00 – 16:30 Feedback and Closing the Session [Pooya Davari]
Prerequisites: This course is intended for intermediate and advanced researchers and engineers in the field of power electronics and its applications, for EMC specialists and advanced university students exploring new harmonics and EMI challenges in power electronics-based power system and WBG-based power electronic systems. General knowledge in power electronics converters operation modes, passive components and basic control theory are preferred. Course exercises and mini projects will be performed on MATLAB/PLECS software platform.
1- Pre-reading the shared materials
2- Power Electronics
3- Basic understanding of power electronics control
Form of evaluation: The participants will work on mini-projects in the final 1-day lecture. The mini projects are defined based on a real application design and will be assigned to group of four people. Groups will compare and deeply discuss their design method and choices and present their results in presentation form to the class.
1- Mini projects
2- Power point presentation
Reference:
• Basics in EMC and Power Quality_Schaffner [Page: 5 - 13]
• H. W. OTT, "Electromagnetic Compatibility Engineering", Wiley, 2009. Chapter 1, pp. 1 – 33
• H. W. OTT, "Electromagnetic Compatibility Engineering", Wiley, 2009. Chapter 5. Passive Components, pp. 194 – 206
• M. Hartmann, H. Ertl and J. W. Kolar, "EMI Filter Design for a 1 MHz, 10 kW Three-phase/Level PWM Rectifier," in IEEE Transactions on Power Electronics, vol. 26, no. 4, pp. 1192-1204, April 2011.
• H. W. OTT, "Electromagnetic Compatibility Engineering", Wiley, 2009. Chapter 2. Cabling, pp. 44 – 68
• Tips and Tricks for Successful Power Designs, Texas Instrument
• M. Lobo Heldwein, “EMC Filtering of Three-Phase PWM Converters”, PhD Thesis, ETH, 2007.
• Keysight Application Note: “Making EMI Compliance Measurements”, 2015.
• P. Davari, E. Hoene, F. Zare, and F. Blaabjerg, “Improving 9-150 kHz EMI performance of single-phase PFC rectifier”, In Proc. of CIPS, 2018.
• R. W. Erickson, "Optimal single resistors damping of input filters," Applied Power Electronics Conference and Exposition, 1999. APEC '99. Fourteenth Annual, Dallas, TX, 1999, pp. 1073-1079 vol.2.
• K. Raggl, T. Nussbaumer and J. W. Kolar, "Model based optimization of EMC input filters," 2008 11th Workshop on Control and Modeling for Power Electronics, Zurich, 2008, pp. 1-6.
• P. T. Jensen and P. Davari, "Power Converter Impedance and Emission Characterization Below 150 kHz," 2021 IEEE International Joint EMC/SI/PI and EMC Europe Symposium, 2021.
• P. Davari and F. Blaabjerg, “Impedance Analysis of Single-Phase PFC Converter in the Frequency Range of 0-150 kHz”, IPEC 2022, ECCE-ASIA, 2022.
• F. Zare, H. Soltani, D. Kumar, P. Davari, H. A. M. Delpino and F. Blaabjerg, "Harmonic Emissions of Three-Phase Diode Rectifiers in Distribution Networks," IEEE Access, vol. 5, 2017.
• H. Soltani, P. Davari, F. Zare, and F. Blaabjerg, ”A review on the effects of dc-link filter on harmonic and interharmonic geenration in three-phase adjustable speed drive systems," in Proc. of ECCE, 2017.
• Ganjavi, F. Zare, D. Kumar, A. M. Abbosh, K. S. Bialkowski and P. Davari, "Mathematical Model of Common-Mode Sources in Long-Cable-Fed Adjustable Speed Drives," in IEEE Transactions on Industry Applications, vol. 58, no. 2, pp. 2013-2028, March-April 2022
• S. Weber, S. Guttowski, E. Hoene, W. John and H. Reichl, "EMI coupling from automotive traction systems," 2003 IEEE International Symposium on Electromagnetic Compatibility, 2003. EMC '03., 2003.
• E. Hoene, A. Lissner, S. Weber, S. Guttowski, W. John and H. Reichl, "Simulating Electromagnetic Interactions in High Power Density Inverters," 2005 IEEE 36th Power Electronics Specialists Conference, 2005.