ISO/TS 7637-4

Road Vehicles — Electrical disturbance by conduction and coupling

Part 4: Electrical transient conduction along shielded high voltage supply lines only

Download PDF

Content:

1. ISO 7637-4
   1. General
   2. Transient emission test
   3. Immunity test – Pulse A
   4. Immunity test – Pulse B
2. Our solution
   1. CAR-AN-HV
   2. CAR-AWG1200
   3. CAR-CN50-1
   4. CAR-AWG25
   5. CAR-PS1500
   6. Combined System
3. Usage
4. Summary

ISO/TS 7637-4

General

Transient emission test:

The automotive system consists of many data, supply lines and components. All of these together form a passive network of impedances and capacitances. This is defined in the standard as an artificial network (AN).  Transient emission tests show, how the device under tests behaves in under these circumstances

Immunity tests:

There are two types of disturbances on the high voltage supply lines generated by the  switching of various devices:

• Pulsed sinusoidal disturbances (Waveform A)
• Low-frequency sinusoidal disturbances (Waveform B)

The device under test:

• Shielded high-voltage supply lines
• Supply voltages up to 1500V

Transient emission test

Immunity test – Pulse A

Immunity test – Pulse B

Our solution

CAR-AN-HV

1. Power supply/ battery (optionaly)
2. Switchable load for high voltage battery (resistor external)
3. Residual voltage monitoring with ground switch
4. Switchable capacitor 100µF
5. Artificial network
6. 50Ω termination

CAR-HVC: Control unit + CAR-AN4:

Artificial network Designed for testing passive and active components and devices:

• Used for emission test and immunity tests (A and B)
• Triggerable load switch
• Load for high voltage battery included
• 100µF capacitor included
• Security due residual voltage control and ground switch
• External artificial network according ISO7637-4

Car-AWG1200

Low frequency generator

• Used for Immunity test – Pulse B
• Output voltage: 0-75V
• Output current: 40A
• Frequency sweep range: 1 - 300 kHz

Car-CN50-1 

Coupling transformer

• Used for coupling Immunity test - Pulse B
• Voltage capability: 600V
• Current vapability: 50A
• Frequency range: 30 – 300 kHz

Car-AWG25 

Simulator for sinusoidal disturbance

• Used for immunity tests – Pulse A
• Frequency range: 100kHz – 250MHz

Car-PS1500

Power Supply:

• Load for high voltage battery included
• Output Voltage: 0 - 1500V
• Output Current: 30A
• Constant power: 15kW
• Slew rate: 100V/s

Combined system 

Compact and customer friendly:

• Main switch
• Remote controlled
• Security due to voltage monitoring and earthing switch
• Security due residual voltage control and ground switch

Transient emission test

Immunity test - Pulse A

Immunity test - Pulse B

Summary

Car-PS1500

Designed for testing passive and active components and devices:

• Transient emission test
• Immunity test – Pulse A
• Immunity test – Pulse B
• Compact construction
• Customer-friendly control
• Secure (Voltage control, earthing switch)
• Space for extensions (higher power supply)

  Click here to see all of our articles