EMC-PARTNER 103514, User Manual

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MIG-OS-OS1_MIG0603OS1_MIG0603OSI M odular I mpulse G enerator
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In all the equations above:
t = time
Vp = maximum or peak value of the open-circuit voltage
Ip = peak value of the short circuit current
Calculated waveform with the equation above:
1,2/50 µs Wave
8/20 µs Wave
The circuit diagram of a generator capable to generate the two waveform above is showed below.
Generators to carry out combination wave tests
Figure: 1.0.3-2
Legend:
RL Charging resistor Cs Impulse capacitor S High voltage switch
RE1 Discharge resistor Ls Inductance of the generator Rs Serial resistor
RM Shunt RE2 Discharge resistor TM1 Divider
Lv Inductance of the connection MS Measurement equipment TM2 Divider
A dc source charges the capacitors within the different modules via the charging resistors. Closing the
switch S discharge the capacitors into the parallel branches RE1, RE2 and EUT. When the EUT has a high
impedance the CWG generates a voltage rise defined by the serial inductance Ls and by the parallel
resistor RE2. The half value time is determined by Cs and the both RE1 // RE2. When the EUT has a low
impedance the generated current is determined by the elements Cs, Ls, Rs and the EUT.
The current and voltage waveforms are defined in IEC 61000-4-5 as follows:
Test generator CWG
EUT, e.g. Motors