AMETEK CTS have announced the release of the New Ripple NX, a
high-power ripple generator designed to perform ripple immunity tests. It
offers the power to test high power high voltage components i.e., electric
drives, high voltage batteries, DC-DC converters, on-board chargers, and other
high voltage components. It can also be used to generate ripple on high-power
The requirements of today’s Electric Vehicle Powertrain presents
unique EMC immunity challenges for vehicle manufacturers and component
The robust AC induction motor has become the preferred main drive system for
the latest generation of EVs. However, an unwanted side effect of the inverter
technology, used to control the speed of the AC motor, is large ripple
disturbances that become superimposed on the DC power system.
To ensure that other components and systems are unaffected by the disturbance,
a ripple immunity test is now required by international standards such as ISO
21498-2 and ISO 7637-4 or manufacturer standards such as MBN 11123, VW 80300,
and PSA B21 7712, and is becoming increasingly important due to the constantly
developing automotive industry.
Testing low impedance HV components and systems are a big challenge when ripple
testing due to the high power disturbances that must be generated. However,
this is not a problem for the new Ripple NX from AMETEK CTS.
The Ripple NX is a fully integrated test system that includes all
> Low-frequency amplifier 10 Hz - 300 kHz, 160 Vp,
63 Ap or 126 Ap
> Coupling network consisting of coupling transformers and a
> Measurement and control unit
> Capacitor bank 10mF (low ESR) with pre- and discharge
> Connection boxes with connection cables
The fully integrated system guarantees a minimum setup time,
error-proof cabling, and reduced operator interaction. The components are
designed that they optimally work as a system, ensuring the maximum voltage,
current, and system power.