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Testing for e-drives rethought

Müller-BBM VibroAkustik Systeme and DEWETRON enhance the testing for e-motor development and quality assurance

The electrification of drivetrains is changing the testing requirements for components and assemblies.

To provide customized tools for e-motor development, DEWETRON and Müller-BBM VibroAkustik Systeme now enable an integrated testing solution for e-NVH and e-power.

Power analyzers from DEWETRON (e.g. DEWE3-PA8 or DEWE3-PA8-RM), which precisely acquire currents and voltages with 10 MS/s sampling rate can now be connected to the data stream of NVH systems via the PAK device cloud, the live IO hub of Müller-BBM VibroAkustik Systeme. The measurement data is time synchronous. In this way, electrical quantities, such as power and efficiency values, of electric motors can be directly correlated with NVH data, such as housing vibrations and emitted sound. This allows to view these correlated phenomena in an extended context and to tune the control of the e-motor on the test bench directly.

“Our PAK device cloud offers an open architecture that combines data streams from different data sources and manufacturers”, says Andreas Ansorge, Managing Director of Müller-BBM VibroAkustik Systeme GmbH, explaining the technology. “The entire data stream is provided to a variety of applications, like our PAK software – a powerful NVH suite – or to other participating partner products. Users benefit from a very flexible platform enabling customized environments with tailored tools.”

DEWETRON’s power analyzers are configured by the in-house software OXYGEN which easily computes over 30 e-motor related performance parameters, such as active, apparent, and reactive power. OXYGEN sends both the raw voltage/current data and the calculated e-power quantities to the PAK device cloud which combines it with the NVH data. Evaluations are done online in PAK.

Thanks to this cooperation, engineers can now study different motor control settings on the test bench directly, relating the control strategies to their effects on the motor’s electric and NVH performance simultaneously.

“For our customers, this means a real progress in testing, as interdisciplinary engineering is now possible at the test bench directly”, says Klaus Quint, Managing Director of DEWETRON GmbH. “By coupling our power analyzers with the NVH measurement and analysis system PAK, a wide range of testing tasks in the field of electromobility can thus be addressed much more efficiently.”

Andreas Ansorge adds, “the integration of the power analyzer into the NVH data stream is just the first step for networked testing. Further data source integrations are already in process."


Contact for further information:

Dennis de Klerk, PhD

Müller-BBM VibroAkustik Systeme

T: +31 621 574 851

Dipl. Ing. (FH) Christoph Wiedner


T: +43 316 3070 484



Related Files

Press Release | 2021-06-07
e-NVH - Investigating the correlations between e-power & NVH