Electromagnetic Interference (EMI)

Slides:



Advertisements
Similar presentations
Noise Lecture 6.
Advertisements

POWER QUALITY BACKGROUND & ELEC-SAVER TVSS
September 6, 2014IEEE NJ Coast1 Environmental effects of Wireless radiation K.Raghunandan Construction Administrator (Wireless) Communication Engineering.
ITU Forum on "Human Exposure to Electromagnetic Fields (EMFs) in Latin America" Session 1: The other side of ICT convergence: EMF exposure and issues Montevideo,
Unlicensed to Kill: A Brief History of the Part 15 Rules Kenneth R. Carter Senior Consultant wik-Consult GmbH THE GENESIS OF UNLICENSED WIRELESS.
Solar Flares HOW DO THEY AFFECT US?. What is a solar flare?  A magnetic storm on the sun  A large energy release  A glow, then…  A huge ejection into.
Alternating Current Circuits And Electromagnetic Waves Chapter 21.
L 28 Electricity and Magnetism [6] magnetism Faraday’s Law of Electromagnetic Induction –induced currents –electric generator –eddy currents Electromagnetic.
L 28 Electricity and Magnetism [6] magnetism Faraday’s Law of Electromagnetic Induction –induced currents –electric generator –eddy currents Electromagnetic.
Principles of Telecommunications Technology Chapter 2.
ESE – Andrew Rusek Applications of Computer Modeling in Electromagnetic Compatibility (EMC) Tests (Part1) P8. Field Pattern of Three Radiating.
Advanced Topics in Next- Generation Wireless Networks Qian Zhang Department of Computer Science HKUST Wireless Radio.
Introduction to Networking. Spring 2002Computer Network Applications Analog Devices Maintain an exact physical analog of (some form of) information. Ex:
Introduction to RF and Microwave Systems
Wally is a slacker, he is always looking for the easy way out of doing anything.
By Stephen, Victor, Thomas and Tim. What Is a Transformer? A device designed to transfer energy from one electrical circuit to another.
Transformers and Coupled Circuits
The End Of The Plug?. What is it? Based on electromagnetic induction (using conductive materials in coils to create a magnetic field) Resonant Magnetic.
Possible Impact of VDSL on Stations Operating in the Amateur Radio Service Ed Hare, W1RFI ARRL Laboratory Manager 225 Main St Newington,CT 06111
UNDERSTANDING WITRICITY Catherine Greene. What WiTricity isn’t  Traditional Magnetic Induction  Electronic tooth brushes  Charging pads  Transformers.
Chapter 22 Alternating-Current Circuits and Machines.
Unit 27 Transformers. Objectives –After completing this chapter, the student should be able to: Describe how a transformer operates. Explain how transformers.
Exposure to risks arising from electromagnetic fields Chris Marshman York EMC Services Ltd University of York.
BENE 1113 PRINCIPLES OF ELECTRICAL AND ELECTRONICS
Wireless Power By: Peter Woods Supervising Professor: Dr. Chiao July 16 th 2013.
1 INTERNATIONAL TELECOMMUNICATION UNION Telecommunications Development Bureau (BDT) REGIONAL OFFICE FOR AFRICA EMF ENVIRONMENTAL CHARACTERIZATION OVERVIEW.
EMI and medical devices The problem: the EMI environment; why? Device types emitting EMI Devices affected Stakeholders Historical development and issues.
Kashif Bashir1 Basic Electronics Kashif Bashir Web:
Electromagnetism Shana Simmons Physics Per.6. Electromagnetism Electromagnetism is the physics of the electromagnetic field a field that encompassing.
Basic of Electricity Discuss the electrical properties of matter. Define voltage, resistance, impedance, current, and circuits.
Space Weather Major sources of space weather ● Solar wind – a stream of plasma consisting of high energy charged particles released from the upper atmosphere.
Physical Transmission
Producing Electric Current
TELECOMMUNICATIONS Dr. Hugh Blanton ENTC 4307/ENTC 5307.
Purpose This course discusses techniques for analyzing and eliminating noise in microcontroller (MCU) and microprocessor (MPU) based embedded systems.
Course Introduction Purpose
General Licensing Class Good Grounds Your organization and dates here.
1 POWER QUALITY -- Bhanu Bhushan -- April, Simple examples around us : Ceiling fan regulators Tube lights Lap-tops & peripherals Domestic inverters.
WIRELESS Communication Automation Control. Wireless = Efficiency Performance: Performance: –Space Efficiency: Efficiency. = #receptors / box area –Unlimited.
The Aspect of RF & EMC in Today’s World National University of Singapore B.Tech (Electronics) EE1001E:Emerging Technology in Electrical Engineering 19.
Jeopardy Q 1 Q 2 Q 3 Q 4 Q 5 Q 6Q 16Q 11Q 21 Q 7Q 12Q 17Q 22 Q 8 Q 13 Q 18 Q 23 Q 9 Q 14 Q 19Q 24 Q 10 Q 15 Q 20Q 25 Final Jeopardy MagnetismTermsElectricityMixedCircuits.
Alternating and Direct Current Direct Current (DC) is the one way flow of electrical charge from a positive to a negative charge. Batteries produce direct.
Wally is a slacker, he is always looking for the easy way out of doing anything.
1 Power Quality EKT 451 CHAPTER 8. 2 Introduction Utilities transmit electricity over power lines into home as an alternating current (AC) wave. This.
EMI EMC Introduction : Widespread use of electronic circuits for communication, computation, automation, and other purposes makes it necessary for diverse.
Prof R T KennedyEMC & COMPLIANCE ENGINEERING 1 EET 422 EMC & COMPLIANCE ENGINEERING.
Introduction to Power Supplies
Introduction  Utilities transmit electricity over power lines into home as an alternating current (AC) wave.  This is how power travels through wiring.
Wireless Electricity Transmission
Topic : 4.0 WIRELESS TECHNOLOGIES.  Wireless networks utilize radio waves and/or microwaves to maintain communication channels between computers. Wireless.
Basic Components used in Electronics. Used in electronic circuits to charge up to a given potenti al.
FUNDAMENTALS OF ELECTRICAL ENGINEERING [ ENT 163 ] LECTURE #10 ELECTRICAL MACHINES HASIMAH ALI Programme of Mechatronics, School of Mechatronics Engineering,
L 28 Electricity and Magnetism [6] magnetism Faraday’s Law of Electromagnetic Induction –induced currents –electric generator –eddy currents Electromagnetic.
La Entrada Goes 1:1 with Wi-Fi. Technology that allows an electronic device to share data using electromagnetic radiation (EMR) waves over a computer.
The Different Types of Inductors and Their Affecting Factors
WIRELESS CHARGING Presented by: K.MAHESH (08T81A1236)
A+ Computer Repair Lesson 9 Problems Causing Power Events.
Electromagnetic Induction. A voltage is induced when there is relative motion (perpendicular) between a conductor and a magnetic field. It doesn’t matter.
IEEE NPEC SC2 Equipment Qualification Electromagnetic Compatibility Compliance Type Test-Design Considerations- Installation and Mitigation Standard/Guidance.
Balaji engineering college Special transformer
The University of Adelaide, School of Computer Science
Safety Standards & Block-Block Interface Definitions
Safety & EMC Standards & Block-Block Interface Definitions
Safety & EMC Standards & Block Requirements
What are transformers and how do they work?
SHORT RANGE WIRELESS POWER TRANSMISSION
Test Requirements and Procedures
Lecture 1 - Introduction to Electrical Engineering
Presented by Applied Energy LLC
Presentation transcript:

Electromagnetic Interference (EMI) Eric Mitchell Phil Zanotti Kasra Dabiran Leon Voskov Ross Schwarz

Overview Introduction Examples Prevention and Mitigations Techniques Wireless Devices Natural Interferences Switching Circuits Radio Frequency Electromagnetic warfare Prevention and Mitigations Techniques Standards and Regulations Summary

Background What is EMI? Electromagnetic Interference is disturbance that affects an electrical circuit Caused by induction or outside radiation Can temporary and permanently disrupt circuit components Big design issue for new products

How does EMI work? Causes Effects Electric fields radiating from currents Switching circuits, clocks, natural fields, ect. Coupling of electric fields into circuits and components Unintentional and intentional Effects Causes problems for electronics Loss and disruption of data Growing problem with more advanced devices

Examples of EMI

Solar Interference 2012 Solar Maximum Solar Storm of 1859 11 year solar cycles Flight routes over north pole changed Solar Storm of 1859 March 1989 Solar Storm X-class solar flare Power outage in Quebec Communications with some satellites disrupted for hours Other potential issues Spacecraft communication Induced currents on underground piping HF radio interference

Interference at 2.4 GHz Why use 2.4GHz? Part of the ISM Band No license needed to design devices in this range FCC originally designated 2.4-2.483 GHz band for microwave ovens Devices and protocols that operate in this band Cordless telephones Baby monitors Bluetooth Wi-Fi 802.11b and 802.11g wireless devices (most routers) Wireless cameras and controllers

Cellular Device Interference Airplanes No proven scientific basis for banning cell phone use on airplanes FAA, FCC, and aircraft OEMs are unwilling to spend money to do testing Ban on cell phone use errs on the side of caution Medical Equipment 2007 Mayo Clinic study showed that phones have no negative effect on medical equipment FDA has developed standards for pacemaker OEMs to ensure safety

Power Converters Capacitive, Inductive, and Resistive loads Caused by sudden load changes Found in many household items Computers, phone chargers, TVs, etc. Minimal or no EMI effect created

Electromagnetic Pulse Intense surge of electromagnetic radiation Created using high-energy explosion (i.e. nuclear) Gamma rays trap high-energy electrons in earth’s magnetic field Destroys all power electronics connected to affected power grid

Radio Frequency Interference Two way transmitters, radio stations, amateur radio broadcast Interrupted signal before reaching receiver Results in signal masking and distortion

Prevention and Mitigation

EMI Filters and Chokes Coil of wire wound around magnetic core Blocks high-frequency AC in a circuit Passive inductor Impedance is proportional to frequency Simple and inexpensive Energy Reflected back up the cable Absorbed resistively within ferrite core (heat) Audio vs. Radio

Electromagnetic Shielding Shields Examples Enclosure formed by conducting material Isolates electrical devices and blocks external electric fields Often known as Faraday Cage (invented in 1836) Amount of reduction depends Material and its thickness Size of shielded volume Frequency of fields Cables MRI scan room Microwave oven Electronic devices

Mitigation Software and Techniques EMI Analyst is a tool used for meeting EMI requirements set by regulatory agencies Combines all four areas of EMI analysis Conducted Emissions Radiated Emissions Conducted Susceptibility Radiated Susceptibility Money Saving Tool Reduction of circuit design area

Final Emissions Screenshot

Standards and Regulations

EMI Testing Procedure

Regulation Committees FCC CISPR Federal Communications Commission United States Modems, Printers, and other I/O devices The International Special Committee on Radio Frequency Interference International House hold appliances, Ignition systems, fluorescent lamps

Classes of Regulations Class A Class B “A computing device that is marketed for use in a commercial, industrial, or business environment; exclusive of a device which is marketed for use by the general public, or which is intended to be used in the home.” “A computing device that is marketed for use in a residential environment notwithstanding use in a commercial, business, and environmental environments.”

FCC and CISPR Class A

FCC and CISPR Class B

Other types of standards MIL-STD-416D CE - Conformité Européenne Department of Defense Even harder-to-meet standards than FCC and CISPR Dependent on reliability of electronic and communication equipment European Conformity Identifies that a product or machine is compliant with all safety requirements Requirement not a voluntary process

Conclusion Introduction and Background Examples of Electromagnetic Interference Prevention and Mitigation Techniques Laws and Regulations Questions?