AVL Ripple Generator™

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Ripple emulation for battery, fuel cell, inverter and component testing.

Ripple Generator

The inverter required in electric powertrains causes a ripple on the entire DC-bus due to the switching of the transistors. This ripple can negatively affect the lifetime of a battery or alter the inner resistance and therefore also the battery’s efficiency. The ripple also influences other DC bus components such as a second inverter, an onboard charger, or heating/cooling units. It can cause the component to either cease functioning entirely or depart from their stable operating point.

We have designed the new AVL Ripple Generator™ to support HV component testing and to investigate immunity to voltage ripple

The emulated currents on a testbed and the signals measured in a real vehicle are different, mostly due to the high dynamic background noise (aka ripple) of the inverters. Depending on the noise level, the lifetime of the battery may be affected, or a component may fail from its stable operation.

This is why OEMs come up with specific testing standards like LV123, a testing directive, defined by European OEMs, focusing on the electrical characteristics of HV components in electric vehicles. Our AVL Ripple Generator also fulfills other standards like: LV124, LV148, VW80300, VW80303, ISO 16750, MBN11123 and ISO 21498.

Ripple Generator

An Effective and Automated Test Setup

The AVL Ripple Generator™ was designed to add mid-frequency AC currents with up to 200 kHz to an existing DC bus. Additionally, the AVL E-STORAGE BTE™ DC supply features an internal ripple emulator to cover the low-frequency range. Together they provide an outstanding solution to emulate the inverter behavior at the test item and may also be used as a powerful broadband signal source for impedance measurements.

  • Ripple generation from 300 Hz to 200 kHz
  • Amplitude up to 200 App
  • AVL-patended coupling network and current control
  • Easy integration to AVL automation systems AVL PUMA 2TM, AVL LYNX 2TM
  • Easy installation in existing testing equipment and tested compatibility with AVL E-STORAGE DC supplies and AVL Cell TesterTM
Technical Data Unit

Frequency range

300 Hz – 200 kHz
Max. current 200 App
Max. voltage 150 Vpp
Waveforms Any waveform (with DAC)
Sum height  177 mm + 132 mm --> 7 HE
Width 442 mm
Lenght 507 mm
Weight 22,7 + 16,6 --> 39,3 kg


Easy installation

Easy installation in existing testing equipment and tested compatibility with AVL E-STORAGE™ DC supplies and AVL CELL TESTER™. 

Fast & Accurate

AVL-patented coupling network and current and/or voltage control directly at the UUT. 


The mobile design of the Ripple Generator ensures higher device utilization. 

Full Control

Full control of amplitude and shape due to AVL patented measurement and control concept. 


Standardized for: LV123, LV124, VW80300, VW 80303, MBN11123, PV8450, ISO 16750 and ISO 21498.


Parallelization of up to six several ripple generators to emulate larger inverter disturbance currents.

Excitation of Different Waveforms

For example, for excitation of a frequency spectrum of defined frequencies and for long-term tests of batteries or for playback of recorded driving profiles.

Solution Sheet AVL Ripple Generator

Join us in exploring new e-horizons

White Paper Ripple Voltage Safety

Testing the High Voltage DC Bus for Ripple Voltage Safety


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