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Home » Products » SYSTEM INTEGRATION » ISO 7637-2: Electrical transient conduction along supply lines only »

Transient Immunity

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    • CISPR 25 Radiation & Conduction Measurement
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    • ISO 7637-2: Electrical transient conduction along supply lines only
      • Transient emission
      • Transient Immunity
        • Pulse 1
        • Pulse 2a
        • Pulse 3a/3b
        • Pulse 2b
        • Pulse 4
        • Pulse 5
    • ISO 7637-3: Electrical transient transmission by capacitive and inductive coupling via lines other than supply lines
    • ISO 16750-2: Environmental conditions and testing
    • ISO 11452-2: Absorber-lined shielded enclosure
    • ISO 11452-4: Harness excitation methods (Including BCI method)
    • ISO 11452-5: Stripline
    • ISO 11452-8: Immunity to magnetic fields
    • ISO 11452-9: Portable Transmitters testing

Transient Immunity

n  Transient Immunity


pulse-1.jpgPulse 1 - A simulation of transients due to supply disconnection from inductive loads; it applies to a DUT if as used in the vehicle, it remains connected directly in parallel with an inductive load

pulse-2a.jpgPulse 2a - Simulates transients due to sudden  interruption of currents in a device connected in parallel with the DUT due to the inductances of the wiring harness

pulse-2b.jpgPulse 2b - Simulates transients from dc  motors acting as generators after the ignition is switched off

pulse-3ab.jpgPulse 3a/3b - Occurs as the result of switching processes. The characteristics of this pulse are influenced by distributed capacitance and inductance of the wiring harness

pulse-4.jpgPulse 4 - The voltage reduction caused by energizing the starter motor circuits of the internal combustion engines

pulse-4-variant.jpgPulse 4 Variants – Most manufacturer variations of pulse four are generally much more complicated.  For example Ford requires up to four arbitrary generators with four outputs to be perfectly synchronized.

pulse-5.jpgPulse 5 – Simulation of a load dump transient occurring in the event of a discharged battery being disconnected while the alternator is generating charging current with other loads  remaining on the alternator circuit at this moment

magnetic.jpgMagnetic Field Immunity – Simulates magnetic fields generated by electric motors, daytime running lamps, etc. for DUTs with magnetically sensitive devices.

transformer.jpgTransformer Coupled Sine Waves – Sinusoidal noise burst coupled on battery lines



transient-immunity-1.jpg


iso-7637-2-transient-immunity-delta-2-1.jpgiso-7637-2-transient-immunity-delta1-1.jpg





TOTAL: 6

View:
Pulse 1

Pulse 1

Pulse 2a

Pulse 2a

Pulse 3a/3b

Pulse 3a/3b ( 1 )

Pulse 2b

Pulse 2b

Pulse 4

Pulse 4 ( 2 )

Pulse 5

Pulse 5 ( 3 )

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