Yamaha V150A User Manual download pdf (Page 32)

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

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* Helmholtz coil too

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DUT

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MAGNETIC FIELD AND

VOLTAGE RIPPLE

TEST SETUP

International standards, such as ISO and SAE, require tests with magnetic ﬁ elds

and voltage ripples. The test signal is adapted to the DUT as a frequency sweep.

The application is implemented with the substitution or closed loop method.

autowave.control adjusts the measurement equipment, e.g. an oscilloscope,

for optimum performance and automatically regulates the disturbance signal in

the closed loop method based on the measurement values. It really doesn’t

get any easier!

Magnetic ﬁ eld test per ISO - or SAE J- Sine ripple

(Ford CI  immunity from continuous power line disturbances test pulse)

Voltage ripple per ISO - or SAE J-

TEST SETUP:

 AutoWave (arbitrary generator)

 AMP N (amplifier)

 Radiating loops (Helmholtz coil)

 Current probe

 Measuring device (oscilloscope)

TEST DESCRIPTION:

Large magnetic fields such as those found with high currents or in electric mo-

tors can disturb electronic components in the vehicle. The ISO - stan-

dard defines magnetic field tests with the radiated loop antenna or the Helm-

holtz coil. Many vehicle manufacturers (e.g. Ford EMC-CS ./RI )

adapt the international standards using other set-ups and parameters.

No problem for EM TEST equipment!

TEST SETUP:

 AutoWave (arbitrary generator)

 AMP N/N (amplifier)

 VDS N series (DC DUT supply and interference signal)

 Voltage probe

 Measuring device (oscilloscope)

TEST DESCRIPTION:

Per Ford CI , sine ripples have to be directly superimposed from the DC

source onto the supply line. The closed loop method must be applied for the

test. The entire measurement and regulation is handled by the autowave.con-

trol software.

You can concentrate fully on the DUT, as you should!

SOLUTION:

As the Ford CI  standard prescribes it,

the overlapped signal is measured at each

test point in the closed loop process. The

autowave.control software calculates and

automatically increases the disturbance

voltage until the required value has been

reached.

SOLUTION:

The vector diagram shows each

individual test point, including

the configured tolerance of the

test signal.

TEST SETUP:

 AutoWave

(arbitrary generator)

 AMP N/N (amplifier)

 CN N (transformer)

 VDS N series

(DC DUT power supply)

 Capacitor (HF short-circuit)

 Current probe

 Voltage probe

 Measuring device

(oscilloscope)

TEST DESCRIPTION:

Low frequency disturbance signals in the frequency up to  kHz, overlap

onto supply and signal lines and affect electronic systems in the vehicle. The

disturbance signal generated by the amplifier is transmitted over the audio

transformer onto the lines. Many manufacturers vary these tests in terms of

voltage and frequency. In CI , Ford uses a special transformer coupling with

load, which is already integrated in the CN N.

DUT

SOLUTION:

Each test device can be selected in

the configuration. The parameters

are saved in the program and are

accessed directly. The cursor position

indicates the voltage of the standard

unit (Vpp) and the frequency in a

graph.

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Yamaha V150A User Manual Page 32

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