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EMC in Power Electronics

L. Tihanyi


416 pages

Electronics professionals will find this book invaluable when designing power equipment, because it describes in detail how to cope with the problem of electromagnetic interference. The author shows how to meet the exacting US and European EMC standards for conducted emissions. The book includes a wide range of EMI analysis techniques. An important focus is on the energy content of interference transient signals (traditional analysis concentrates on amplitude and frequency). This provides a more accurate picture of the EMI situation. For those who do not want or need detailed analysis techniques, many approximation methods are also provided. These simplified techniques give accurate results for all but the most stringent applications. The book contains several worked examples and an extensive bibliography, and is sure to be useful to electronic design engineers and others who need to meet international EMC regulations and standards. Laszlo Tihanyi has worked on EMC for over 20 years. Formerly Head of the Department of Power Electronics at the Hungarian Research Institute for the Electrical Industry, he focused primarily on solving EMI problems in electronic systems and developing a dimensioning method for power line filters.

Chapter 1: Introduction
Chapter 2: History of EMC Standardization Efforts
Chapter 3: Description of Electromagnetic Disturbances
3.1 Classifying Disturbances by Frequency Content
3.2 Classifying Disturbances by Character
3.3 Classifying Disturbances by Transmission Mode
Chapter 4: Conducted EMI Measurement
4.1 EMI Measuring Instruments
4.2 Basic Terms and Conducted EMI References
4.3 Measuring the Interference Voltage
4.4 Measuring the Interference Current
4.5 Spectrum Analyzers
4.6 EMI Measurements for Consumer Appliances
4.7 Measuring Impulse-Like EMI
Chapter 5: EMI in Power Electronic Equipment
5.1 EMI from Power Semiconductors
5.2 EMI from Controlled Rectifier Circuits
5.3 EMI Calculation for Semiconductor Equipments
Chapter 6: EMI Filter Elements
6.1 Measuring HF Characteristics of EMI Filter Elements
6.2 Capacitors
6.3 Choke Coils
6.4 Resistors
Chapter 7: Noise Suppression
7.1 Noise Suppression in Relay Systems
7.2 Application of AC Switching Relays
7.3 Application of RC-Snubbers to Power Semiconductors
7.4 Shielded Transformers
7.5 Capacitor Filters
7.6 EMI Generation and Reduction at Its Source
7.7 Influence of Layout and Control of Parasitics
Chapter 8: EMI Filter Circuit Selection and Measurement
8. 1 Definition of EMI Filter Parameters
8.2 EMI Filter Circuits
8.3 Insertion Loss Test Methods
Chapter 9: EMI Filter Design
9.1 EMI Filter Design for Insertion Loss
9.2 Calculation of Worst-Case Insertion Loss
9.3 Design Method for Mismatched Impedance Condition
9.4 Design Method for EMI Filters with Common-Mode Choke Coils
9.5 Damped EMI Filters and Lossy Filter Elements
9.6 HF Characteristics of Noise Filter Circuit Elements
9.7 EMI Filter Layout
Chapter 10: Testing for Susceptibility to Power Line Disturbances
10.1 Surge Voltages in AC Power Mains
10.2 EMC Tests per IEC Specifications
10.3 Other EMS Test Methods
Chapter 11: Reduction Techniques for Internal EMI
11.1 Conductive Noise Coupling
l 1.2 Electromagnetic Coupling
11.3 Electromagnetic Coupling Reduction Methods
11.4 Wiring Layout Methods to Reduce EMI Coupling
11.5 PCB Design Considerations
Chapter 12: Transient Susceptibility Analysis Method
12.1 Noise Filter Design Method for Voltage Attenuation
12.2 Calculating the Energy Content of Transient Disturbances
12.3 Impulse Characteristics and Noise Filter Design
12.4 Surge Protection Devices