Showing posts with label ESD-EMI-RFI. Show all posts
Showing posts with label ESD-EMI-RFI. Show all posts

Wednesday, October 12, 2016

EMI RFI - ElectroMagnetic Interference

Electromagnetic interference (or EMI, also called radio-frequency interference or RFI when in radio frequency) is disturbance that affects an electrical circuit due to either electromagnetic induction or electromagnetic radiation emitted from an external source.
 
Electromagnetic interference Wiki

Vertical polarized VHF- UHF biconical antenna

Vertical polarized VHF- UHF biconical antenna
170 – 1100 MHz with omni directional H-plane pattern

Who would know better about Radio Frequency Interference and ElectroMagnetic Interference more than the Hams or Amateur Radio Community.

If they have to communicate effectively using limited resources, they have to deal with EMI/RFI effectively, While they build their equipment or combat Noise from other Machines and Installations nearby.

This problem needs more practical involvement and experimentation to learn, compared to learning something like Digital Electronics.

Equipment and Electricals like SMPS, AC/DC Drives, Motors, Solenoids and CFL Lamps are to be built/reinforced for low EMI/RFI emission/radiation.

Sensitive Medical Equipment like ECG or even a Aircraft can be seriously affected by Noise.

Radio Frequency Interference (RFI)

Saturday, October 03, 2015

TDK - Electronic components and Materials

Electronic components, materials and power supplies to factory automation systems, anechoic chambers, test systems and more.

TDK - Electronic components and Materials

TDK was founded in Japan on 7 December 1935 to manufacture iron-based magnetic material ferrite, which had been recently invented by Yogoro Kato and Takeshi Takei. In 1952 they began production of magnetic tapes, with compact cassette tapes following in 1966; it is for these that the company is most widely noted

Sensors from TDK

TDK Museum

Through videos and practical demonstrations, the museum introduces how TDK’s products and technologies, centered on our strength in ferrite and “magnetism”, have played a role in the evolution of society and how TDK will be involved in the coming future society in an easy-to-understand, enjoyable, and experiential manner.

Monday, May 12, 2014

EMI RFI Filters and Electrical Noise Control

EMI RFI Filters are required in two situations, to prevent EMI from an Electronic Equipment Like A Dimmer, Thyristor Drive, SMPS or Switcher affecting other Modules in a System or Neighboring Equipment. The Second Situation is when a Sensitive Equipment Like a Medical Apparatus or Precision Measuring Instrument has to be Immune to any Noise from outside, as it can affect performance. EMI RFI Filter
Sometimes it is Accuracy that can get affected, but some electrical jolts can damage or desensitize fine sensors or positioning systems.

On the right you can see a Filter that i used to make long ago, This is connected in series with an Existing Mains Chord. It can also be Fixed in a Control Panel with a Clamp. One Y cap is Missing in this Piece. The Big one must be the X cap a higher Capacitance Value. The Y cap is Lower Value and withstands around 1kV, It is better if X cap is AC 440V.

Related Resources
Here is one type i encountered in many T&M Instruments along with TDK too. It was Schaffner - electromagnetic compatibility - International leader in electromagnetic compatibility (EMC) and power quality (PQ). EMC Filters, RFI Suppression Chokes, Feedthrough Components.

Tuesday, March 18, 2014

Earthing Practice and Power Quality

"Earth leakage currents arise mainly from the EMC filters built into electronic equipment with switched mode power supplies. Standards limit the leakage current from non-fixed equipment (i.e. equipment that plugs into a standard socket outlet) to less than 3.5 mA. When a lot of electronic equipment is in use, the total leakage current in the protective conductor can become significant."

Earthing Practice by Trevor Charlton
  • Methods of Earthing
  • Earth Conductors
  • Electrical interference
  • Lightning Protection

Earthing Practice and Power Quality

Power Quality and Utilisation Guide

The PQ E-library is a collection of electronic technical reference documents covering introduction, costs, harmonics, resilience, voltage disturbances, earthing, energy efficiency and renewables/distributed generation. See also - Power Quality

Copper Development Association
  • Educational Resources
  • Computers cannot work without copper
  • Electricity in buildings
Copper Development Association Website for information on Copper and Copper Alloys

Copper Development Association - Resource Library

Copper Development Association provides a range of resources in support of the correct and efficient use of copper and copper alloys for major applications.

Tuesday, March 05, 2013

Kenneth Wyatt - EMC design and training services

A consulting firm that specializes in EMC design, troubleshooting and training services to commercial and industrial manufacturers with global distribution in the consumer, computer, network & telecommunications, industrial and scientific industries.

Kenneth Wyatt -  EMC design and training services

Kenneth Wyatt -  EMC design and training services

DIY 6 GHz comb generator by Kenneth Wyatt

Most simple DIY comb generators seem to run out of steam about 1 GHz. I recently ran into David Bowman’s 2.4 GHz circuit and measured an upper usable range of about 6 GHz. While greatly attenuated above 3 GHz, this circuit should still be valuable for measuring semi-anechoic chambers in the GHz ranges.

Wyatt Technical Services, LLC
56 Aspen Dr. Woodland Park, CO 80863, USA

Monday, March 04, 2013

Technical Resource - Marc Dekenah

Useful resource on Power Quality, Radio Telemetry, T&M and Interfacing.

Technical Resource - Marc Dekenah

Economical Impulse Generator, Measuring in Excess of 1kV, "Soft Earthing" Instruments and A Real LAN twist cable are pages you must read.

Marc's Technical Pages; knowledge-base of Faultlink International, an independent electrical / electronics fault investigation & analysis consultancy.

Marc is an independent electrical/electronic fault investigation and analysis consultant with over 25 years of industrial electrics/electronics experience as Consultant, System Engineer, Technical Director, Design Engineer and more.

Connecting Up For Intermittent Nuisance Trips

Connecting Up For Intermittent/Nuisance Trips

"Intermittent trips are circuit breakers rightfully operating because of an unknown cause or fault. Nuisance trips are a breaker deeming a non-existent fault has occurred and, in so doing, operates without need."

"Faultlink International is a fully independent broad-range electrical/electronics fault investigation and analysis consultancy."

FaultLink International - Electrical Power Diagnostics

Thursday, May 03, 2012

LCR Electronics - EMI and EMC Products

EMC testing, EMI Filter design, development and manufacturing. Complete range of high quality standard and custom EMI filters (RFI filters, EMC filters), Motor Controls and Electronic Controls.
The also offer EMC testing, engineering and contract manufacturing services.
LCR Electronics - EMI and EMC Products
LCR designs and manufactures custom and standard backplanes, card cages, chassis and sub-system enclosures too.

LCR Electronics, Inc. 9 South Forest Avenue, Norristown, PA 19401

Wednesday, October 12, 2011

Surge Protection and Lightning Arrestors

Supplementary to EMI/RFI/EMC Immunity of an Equipment. Many Installations are subject to Highly Disruptive Electrical Environment not just EMI. Depending on the budget and the situation a solution has to be found. Sometimes a CVT or an Isolation Transformer can do a lot of good. Converting all Energy inputs to battery energy and having a Isolated Synthetic Sine Supply may be an expensive but good solution. Either way the devices that face the harsh environment have to be over rated along with these protections.

Siemens Residential Surge Protection

Abstract-This study examines the design and construction of AC Electronics load surge protection in order to carry electric surge load arisen from faults in low voltage electricity system (single phase/220V) by using the principle of electronics load clamping voltage during induction period so that electric voltage could go through to safe load and continue to work. The qualification of the designed device could prevent both transient over voltage and voltage swell.

Design of AC Electronics Load Surge Protection - World Academy of Science, Engineering and Technology - WASET

See a product from the MTL Instruments Group. They have a Comprehensive range of surge protection devices offering solutions for all mains power, process control, network and communications, telecom, wireless and RF systems.

ZoneMaster Series

The ZoneMaster Series is available in units with either a 200 or 170kA surge handling capability. ZoneMaster is engineered to protect the most critical electronic systems, suppressing surges at the main service panel.

Tuesday, October 11, 2011

Electrical Safety and Clean Power

This is an educative and important guide for Electrical Equipment Safety. This can be also applied partially to Power Electronics and Home Energy Systems. Electronic Equipment also have to be maintained by Calibrating them and protecting them from environmental parameters like dust, grime, direct sunlight, moisture, humidity, sea wind (brine), corrosive fumes and chemicals. They should not be even placed near machines like a big lathe, sub-sonic or low frequency vibrations.

Electrical Safety Testing Reference Guide

Electrical SafetyElectrical Safety is a Serious Issue Electrical Safety in the workplace is the most important job of an electrical worker. No matter how much training one has received or how much employers try to safeguard their workers, Electrical Safety is ultimately the responsibility of the electrical worker.

Electrical Safety Hazards Handbook

Power Studies, Arc-Flash Hazard Labeling, Data Gathering and Inspection, Engineering Services.

The steps to osha electrical safety

Electrical Design, Lighting and most important Earthing or Grounding. Good Reference Articles and Product Reviews.

Electrical Construction and Maintenancee Power Quality, National Electric Code, Construction, V/D/V, Ops, Equipment Rental Industry Resourc

Earthing or Grounding is something Audio Enthusiasts make a lot of fuss about. The Articles here about Balanced Power, Symmetrical Power Systems and Earthing throw light on ways to counter Audio Noise.

Clean PowerAC Power has the 50/60 Hz noise, now more AC noise can be picked up by poorly designed systems when so many gadgets around. These articles are also relevant for the instrumentation engineer. Dissonance is encountered when you build sensitive strain gauge based measurements or while measuring and transmitting micro-volts from a remote sensor to the dashboard/control panel.
Index of Technical Articles About Balanced Power

International leader in electromagnetic compatibility (EMC) and power quality (PQ). EMC Filters, RFI Suppression Chokes, Feedthrough Components.

Schaffner - EMC/EMI components, harmonic filters & magnetic components.

Schaffner - electromagnetic compatibility

Friday, September 16, 2011

WEMS - EMI filters and Electronic Manufacturing

ISO 9001-2000 Certified Manufacturer of EMI filters and electronic and electromechanical systems.

WEMS - EMI filters and Electronic Manufacturing

"EMI / RFI Filter Division designs and manufactures high reliability input, output, powerline and signal line filters intended for military, aerospace, and high end industrial applications."WEMS - EMI filters and Electronic Manufacturing
Contract Manufacturing facilities of Wems Include -
  • Mechanical and Electronic Engineering
  • PCB Design & Assembly
  • Thru-hole Board Assembly
  • Surface Mount Assembly
  • Inspection & Testing to Aerospace, Military and Medical Standards
Box Build Specialists WEMS Manufacturing facilities offer total vertical integration.

Contract Manufacturing Division encompasses a wide variety of skills and technologies, including high voltage, high current, hydrolics, pneumatics and complete system assembly.

WEMS Electronics
4650 West Rosecrans Ave. Hawthorne, CA 90250

Monday, May 09, 2011

AlphaLab - Test Instruments for EMI and RFI

Manufacturers of electromagnetic pollution detectors. Assists in determining the safe distance from any EMR source.

AlphaLab - Test Instruments for EMI and RFI

Products Include - DC Gaussmeters, Electromagnetic pollution meter (magnetic, electric, microwave fields). For Static Electricity Surface DC Voltmeters. Others are AC Electric Field Meter, RF Field Strength Meter and Natural Electromagnetic (EM) Meter.

DC Milligauss Meter 3 Axis - AlphaLab

DC Milligauss Meter 3 Axis - AlphaLab

An improvement on the flux gate magnetometer, the AlphaLab DC Milligauss Meter measures magnetic fields (technically "flux density") up to several times the strength of the Earth field. It has a resolution of 0.01 milligauss (1 nanotesla) and a range of +/-2000 milligauss (200 microteslas).

AlphaLab, Inc.
3005 South 300 West Salt Lake City, Utah 84115 USA

Wednesday, April 06, 2011

dBi Corporation - Testing Laboratory

A2LA-accredited EMC/EMI/ESD testing laboratory based in Lexington, Kentucky. They have done the FCC-/ CE-Marking-approval EMC/ EMI/ ESD tests for over 308 products developed by clients; bringing over 97% of them into compliance with both domestic and international laws and standards.

dBi Corporation - Testing Laboratory

The President, John R. Barnes, is a Professional Engineer (PE) licensed in the state of Kentucky, a NARTE-Certified Electromagnetic Compatibility Engineer (NCE)....

dBi Corporation - Testing Laboratory

Some Types of Testing Services they offer
  • Radiated and Conducted Emissions tests.
  • Magnetic Field Immunity tests.
  • Voltage Dip/ Voltage Interruption Immunity tests.
  • Electrostatic Discharge (ESD) tests.
  • Electrical Fast Transient/Burst (EFTB) tests.
My Test Engineering Years - John R. Barnes

He has written three books: Electronic System Design: Interference and Noise Control Techniques, which was published in English in 1987 and in Russian in 1990..

dBi Corporation
216 Hillsboro Ave, Lexington, KY 40511-2105, USA.

Friday, March 06, 2009

Electrostatics Society of America - ESA

Electrostatics Society of America - ESA

"The ESA is a nonprofit professional society founded in 1970 that is devoted to the advancement and improved understanding of electrostatics....

The ESA has a rich and interesting history which highlights the accomplishments of many of the pioneers in Electrostatics over the past half-century."

Joint ESA/IEEE-IAS/IEJ/SFE Conference: June 15-19, 2009 - Boston, MA

Wednesday, August 13, 2008

Compliance Engineering ESD EMC Safety

Ce-mag.com is the world's foremost on-line resource for international developments in regulatory compliance for electronics engineers.

Compliance Engineering
Compliance Engineering ESD EMC Safety
 
Ce-mag.com serves as an on-line extension of Compliance Engineering magazine, providing the same in-depth print resources readers have come to expect from the print publication. These include all current and archived articles, the annual reference guide, a current events calendar, and the suppliers directory.
  • Compliance Engineering Reference Guide
  • CE-Mag Discussion Forum
  • Mr. Static

Saturday, September 01, 2007

Robust Electronic Design - John R Barnes

Robust Electronic Design

Robust Electronic Design - John R Barnes

"As an engineer, I am always working on new things. So I am going to make some mistakes. But I find it very embarrassing to have to redo something because of a mistake that I could and *should* have avoided. ....."

John R. Barnes KS4GL

"My first book, Electronic System Design: Interference and Noise Control Techniques, concentrated on designing electronic equipment to work."

Industrial Standards Index

EMC/EMI/ESD standards for residential/ commercial/ light-industry generic devices

Full Standards Index

(EMC), electromagnetic interference (EMI), and electrostatic discharge (ESD) standards for information technology equipment (ITE) and related (generic) equipment.

Robust Electronic Design, Inc.