New Immunity Basic Standards: IEC 61000-4-31 and -4-39

Andreas KlinkAmetek CTS Europe GmbH Berlin

Standard overview

IEC 61000-4-31

Testing and measurement techniques AC mains ports broadband conducted disturbance immunity (IEC 61000-4-31)

IntroductionSo far covered with IEC 61000-4-6: Disturbances coming from intended radio-frequency (RF) transmitters.Increase of conducted disturbances caused by broadband signal sources on AC mains ports

Intended:Power line telecommunications (PLT)

Conducted broadband disturbance

Unintended:Other noises generated by connected electrical and electronic equipment to the AC mains network

IEC 61000-4-31

Coupling/Decouping Network for DM (CDND)

CMDM

Brodband noise DM = Differential modeCM = Common mode

Coupling NetworksCoupling of the broadband test signal Common mode / differential mode impedanceDecoupling function to other devices are not under testCDNDs (D stands for differential) for AC ports and CDNs (IEC 61000-4-6) for all other ports

CDND according IEC 61000-4-31Frequency range 150 kHz to 80 MHzLongitudinal conversion loss (LCL) of 16 dB in order to couple the common mode signal as well as the differential mode signal simultaneously to the EUT line

UCM (common modeasymm.mode)

UDM (diff.-mode, balanced or symm. mode)

UDM

Balanced pair

LCL Example:

LCL = 0 dB, UDM = UCM

LCL = 16 dB, 1/6.3 x UDM = UCM

LCL = 20 dB, 1/10 x UDM = UCM

LCL = 40 dB, 1/100 x UDM = UCM

LCL = 60 dB, 1/1000 x UDM = UCM

LCL = 80 dB, 1/10000 x UDM = UCM𝐿𝐿𝐿𝐿𝐿𝐿 = 20 ∗log ( UDM/UCM)

Coupling Network

CMDM

Brodband noise

LCL = 16 dB, UDM /6.3 = UCM

UDM = 6.3 x UCM

CDND according IEC 61000-4-31Common mode (CM) impedance 25 ΩDifferential mode (DM) impedance 100 ΩDecoupling >15 dB

Test levels

Disturbance signal

GeneratorWhite noise source 150 kHz to 80 MHzPulse modulation 1 Hz and 2 Hz (50 % duty cycle)Broadband power amplifierLow-pass filter (LPF), and/or a high-pass filter (HPF) to avoid interference with some types of EUTSolution: Teseq NSG 4031

Block diagram of NSG 4031

Example of setup for level setting

Test setup

Test example: PLT adapter

Standard overview

IEC 61000-4-39

Testing and measurement techniques – Radiated fields in close proximity - immunity test (IEC 61000-4-39)

IntroductionIncrease of RF sources in the near fieldChange form broadcast transmitting antennas on the hill to the phone in every pocket

IntroductionExamples of RF sources in the near fieldThe possibility is given that such a RF source comes to a close distance and could influence the environment. Typical situations are in air planes, cars and in the medical environment.The advice to switch off the devices is often not possible.The way out is to make the devices immune against near field disturbances.

IEC 61000-4-39

Testing IEC 61000-4-39

H Field150 kHz – 26 MHz100 mm Loop

RF Field380 MHz – 6 GHzTEM Horn

RF Field 26 MHz – 380 MHzTBD

H Field9 kHz – 150 kHz120 mm Loop

Test levels

Frequency range 9 kHz to 150 kHz 150 kHz to 26 MHz 380 MHz to 6 GHzLevel Test field strength Test field strength Test field strength

A/m A/m V/m1 1 0,1 102 3 0,3 303 10 1 1004 30 3 300X Special Special Special

Modulation

Frequency range 9 kHz to 150 kHz 150 kHz to 26 MHz 380 MHz to 6 GHz

Modulation AM PM PM

Frequency 1 kHz 2 Hz, 1 kHz 2 Hz, 217 Hz, 1 kHz

Parameter 80% 50 % duty cycle 50 % duty cycle

on/off ratio --- 20 dB 20 dB

Level setting CW CW CW

Equipment

Frequency range 9 kHz to 150 kHz 150 kHz to 26 MHz 380 MHz to 6 GHzField magnetic magnetic RF

Radiating loop Radiating loop TEM hornDiameter 120 mm 100 mm ---

Number o turns 20 3 ---Distance to EUT 50 mm 50 mm 100 mm

SetupCurrent probe or

shunt ---Directional coupler,

power meterSensor Field sensor probe Field sensor probe Field strength probe

Diameter 40 mm 40 mm ---Number o turns 51 1 ---

ExampleRadiating Loop Antenna9 kHz – 150 kHz120 mm

Radiating Loop Antenna150 kHz – 26 MHz100 mm

TEM Horn380 MHz – 6 GHz

Spacer Spacer

TEM JIG

Field Sensor Loop9 kHz – 150 kHz40 mm, 51 turns

Field Sensor Loop150 kHz – 26 MHz40 mm.1 turn

Field Probe380 MHz – 6 GHz

TEM horn

TEM hornOne TEM horn for the frequency range 600 MHz to 6 GHzExtendable with matching networks for the TETRA 400 and GMRS 460 / FRS 460 applicationsHigh efficiency

Verification of the field uniformity

TEM Horn Antenna

Field probe(single axis)

100m　± 5mm

0 to -4dBuniform area

100mm

Field uniformity examples

Test execution

Polarisation

Test equipment

The End Any Questions?