An Electrical Engineers Guide:
Published on Nov 27, 2015
No Description
MORE DECKS TO EXPLORE
PRESENTATION OUTLINE
Basic Definitions
- EMC: Electromagnetic Compatibility
- EMI: Electromagnetic Interference
- Electromagnetic Compliance
Photo by kevin dooley
EMC:Electromagnetic Compatability
Photo by Michael Kappel
The ability for eletrical devices to operate in the same environment without interfering with one another
Photo by Michael Kappel
Electromagnetic Interference
Electromagnetic energy emissions from one device causing or reduced or degraded performance from another device.
Photo by Thomas Hawk
Electromagnetic energy emissions from device causing reduced or degraded performance in another device.
Photo by Thomas Hawk
Electromagnetic Compliance
A product is considered to be in Electromagnetic Compliance when it meets all applicable regulations
Photo by Johan Larsson
A product is considered to be in "Electromagnetic Compliance" when it meets all applicable electromagnetic regulations
Photo by Johan Larsson
Global Marketplace
- Mandatory Regulations
- So you can sell in the consumer market
- Anything that has AC or DC power has to be tested
Photo by whoohoo120
Global Marketplace
- Mandatory Regulations
- So you can sell in the consumer market
- Anything that has AC or DC power has to be tested
- Electronic "smog" test
Photo by whoohoo120
Global Marketplace
- Mandatory Regulations
- So you can sell in the consumer market
- Anything that has AC or DC power has to be tested
- Electronic "smog" test
- DOD
Photo by whoohoo120
CISPR & IEC
- Determines and recommends required emissions and immunity
- Limits: For products sold in the commercial world market
- Test Equipment Requirements
- Test Procedures
Photo by SkyFireXII
Radiated Emissions
- Electric Field Strength: dBμV/m
- Magnetic Flux density: dBpT
Photo by Andrew from Sydney
Always use quasi-peak detectors
Historically meant to simulate the human
response to noise.
Photo by Ian Halsey
Measurements Solutions
- Evaluate emissions of device
- Use correct detectors and bandwidth
- Gives an approximation of EMI performance of EUT
Photo by Nick J Webb
Log Periodic Antenna
Biconical Antenna
Near Field Probes
Antenna Tripods
Raise and Lower Antennas
TurnTable
To Rotate the EUT for testing
Design Changes
- Investigate
- Save money to find problems
- Redesign
- Pre-compliance test
- Full Compliance
Photo by Accretion Disc
Everything must be certified
Photo by danielfoster437
