Power frequency Magnetic field Immunity IEC61000-4-8 ?????????

1
Power frequency Magnetic field Immunity
IEC61000-4-8?????????

• Provided by
• PH Yuan

2
Typical Occurrence

• Conductors with high currents ?????
• Motors ??
• Generators ???
• Electrical equipment
• ????
• Transformer Leakage
• ?????

3
Typical effect ??????
????
4
Power-Magnetic Fields Characteristics ???????

• Field frequency equal to frequency of power
  supply system ????????????
• Field strength up to more than 100 A/m
• ??????100??

5
Testing Setup ????
INA 701
Modula 6000
EUT
0.1 m thickness Insulating Support 10cm???????
MFO 6502
?????
Ground Reference Plane
6
MFO 6502 ?????

• Automatic magnetic field option
• Driven from Modula master controller using PDA
  or WIN Modula software
• ??Modula ?Win Modula ???PDA?????
• Connection to antenna loop using banana sockets
  ?????????????
• External Amp meter can be used to monitor the
  generated field
• ???????????????
• H Coil factor X I (????X??)
• H Generated field (?????)
• I Current flowing through antenna loop (
  ?????????)

7
Technical specifications
Total Harmonic Distortion (THD) ????? lt 8 ( nominal lt3,5 at full range )
Frequency ?? Selectable 50 Hz and 60 Hz /- 3
Range Low ??? 80 mA to 400 mA into INA702 ( Cf 9,8) gt allows 0,8 A/m to 4 a/m 80 mA to 440 mA into INA701 ( Cf 0,89 ) gt allows 0,08 to 0,4 A/m
Range High ??? 200mA to 4,1 A into INA702 (Cf 9,8) gt allows 2 A/m to 40 A/m 200mA to 4,1 A Into INA701 ( Cf 0,89 ) gt allows 0,2 A/m to 3,6 A/m
Supply Voltage ???? 90 to 240 V
Power consumption ???? lt 150 W
Operating temperature 5 40 degrees centigrade
Overload protection ???? By temperature sensor on power stage
Weight ?? 4 kg approx.
Dimensions ?? 195 mm x 180 mm x 380 mm
CF ????
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INA 701??????

• Magnetic field loop ??????
• 1 X 1 meter
• Coil factor 0.89 ????
• Field strengths up to 3.6 A/m for power
  frequency fields
• ??????????3.6A/m
• Used with magnetic field generator, MFO 6501/6502
  
• ??MFO 6501/6502 ????
• When doing testing, EUT is to be placed in the
  center of the loop
• ??????????????????????
• Field strength can be monitored via a magnetic
  field meter
• ????????????

9
Installation ??

• Connect MFO 6502 power IN to mains.
  ?????MFO6502?????
• Remove 25 pin interlock connector at rear panel
  of Modula Master Controller. ?Modula????25 pins
  interlock ?????
• Connect the interlock connector to X2 of MFO
  6502.
• ?interlock?????? MFO6502? x2 ?
• Connect Master Controller 25 pin output to MFO
  6502 X1 plug, using system interface cable
  delivered with MFO 6502.
• ????????25pin ???MFO6502x1??
• Connect MFO 6502 to Loop Antenna INA 701.
• Power On MFO 6502.
• Power On Modula main frame.

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Power magnetic field testing terms

• Field Field strength, unit is A/m
• Frequency Power frequency, 50Hz
• Step duration Duration of testing

11
??

• ???Immersion method
• ?EUT???????????????????
• ???Proximity Method
• ??????????????EUT???,?EUT???????
• ??????

12
???????
?? ??? ??? ?????(1-3s) ?????(1-3s)
A/m(??) uT A/m(??) uT
1 1 1.26 - -
2 3 3.78 - -
3 10 12.6 - -
4 30 37.8 300 378
5 100 126 1000 1260
x ?? ?? ?? ??
13

• ????
• ??50Hz??????????????????????????
• ????? 1A/m ??,1A/m ??????????????1.26uT

14
????

• ???????
• 1.?????????
• ????1m x1m ???????1M?????????????????????3dB??,?
  ?????0.6x0.6x0.5m(h)
• 2.???????-???????,??????????
• ????,??????????????,??0.8M????????????????3dB??
  ,0.6m x 0.6m x1m(h) ???????????
• 3.?????????????? ??????EUT???????????,????EUT,???
  ?????????EUT?????????EUT???????,??????????????(???
  ?60 x 60)????(?????????50)???,?????
• ?????EUT??25-30cm

15
Power Frequency Magnetic Field Immunity Test
with MFO 6501 INA 702?????????IEC 61000-4-8
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MFO 6501 ???????

• Manual magnetic field option
• Rotary hand-wheel for current control
• ????????
• Low / High current range selector
• ?/????????
• 50Hz / 60Hz frequency selector
• 50/60Hz ?????
• Connection to antenna loop using banana sockets
  ????????????
• External Amp meter can be used to monitor the
  generated field ??????????????
• H Coil factor X I ??????x ??
• H Generated field
• I Current flowing through antenna loop
• ?????????

17
INA 702

• Magnetic field loops
• 1 X 1 meter
• Coil factor 9.8
• Fitted with POWER plug
• Field strengths up to 40 A/m
• Used with MFO 6501/6502 for IEC 61000-4-8
  testing
• When doing testing, EUT is to be placed in the
  center of the loop
• Field strength can be monitored by a magnetic
  field meter

18
Installation

• Connect MFO 6501 to INA 702 loop
• Insure that POWER plug is fitted
• Connect MFO 6501 to mains.
• Connect external Ampmeter
• Switch ON mains power .
• Adjust the required current through the loop
  using hand-wheel.

19
Test level adjustment
???????????CF??????
Standard level Field in the loop A/m Current required for INA 702 ( power ) Cf 9,8
1 1 0,102 A
2 3 0,306 A
3 10 1,02 A
4 30 3,06 A
x 40 ( max ) 4,08 A
H CF x I ????????? x ??????? ????(H)
20
IEC61000-4-9

• Pulse magnetic field immunity
• ?????????

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IEC61000-4-9???????
?? ?????? ??????
A/m uT
1 - -
2 - -
3 100 126
4 300 378
5 1000 1260
x ?? ??
22
?????

• ????? 6.4us30
• ?????16us30
• ??????100 to 1000A
• ?? ?????
• ???????????0 360?????10???
• ?????????
• ??????????????(??1.2/506.4/16us)